TERRITORIALITY AND SPATIAL FORMS!

from The Challenge of the Slums, UN Human Settlements

Spatial forms and the physical location of slums vary from region to region, from city to city and even within the same city. The working definitions of slums, suggested in Chapter I, as non-complying with building regulations and standards, having inadequate basic services provision and insecure tenure status, leave a great deal of room for variation, from marginally inadequate in one feature to being a place of multiple insanitary and deprived conditions.²

Though the term slum includes the traditional meaning of housing areas that were once respectable or even desirable, but which have since deteriorated, it has come to include the vast informal settlements that are quickly becoming the most visual expression of urban poverty. Indeed, the majority of dwellings in most of the world's developing cities are in slums. Informal settlements come in many forms; but virtually all are either squatter settlements or illegal settlements and so it is important to distinguish between these even though they have an overwhelming range of similarities. The twofold tenure problem of squatters - that is, that they have neither the owner's permission nor the permission of the local authorities (while illegal settlements have the owner's permission)- tends to render life there more tenuous and to discourage investment.

Many important historic cities are in danger of terminal obsolescence. Fine traditional environments such as Old Cairo, Shah Jahanabad (Old Delhi), the medinahs and casbahs of the Arab world, and the walled cities in Rajasthan, are just a few examples of important historic areas that now demonstrate the characteristics of slums. They are particularly sensitive areas as they may attract fervent loyalty from many citizens, provide accommodation for rich, traditionally powerful families or their retainers, harbour important traditional craft enterprises, and surround important religious and cultural edifices.

At the same time, many peripheral neighbourhoods, even in the same cities, are being constructed with the characteristics of slums from day one, or soon after. Some of these are government- or employer-built estates of low- cost housing, providing minimal accommodation for formal-sector workers. These often quickly deteriorate through lack of maintenance and unplanned levels of occupancy. Some are even built to standards of servicing that render them inadequate - for example, the Bastuhara housing at Mirpur, Dhaka, Bangladesh, where no toilets or water taps were fitted when the tiny dwellings were built in the 1970s.3 Others are informally built, peripheral settlements that ring many developing cities. Some of the most spectacular can be seen in Rio de Janeiro, Caracas and La Paz, beginning in the lower slopes at the edge of the formal city and climbing to dizzying heights, often using the roof slab of a lower dwelling as their site. There is astonishing dynamism displayed in the founding and improvement of these settlements, and the lessons learned from them should not be ignored. At their earliest stage, they may be extremely poorly built and unserviced; but through the years they can develop into sturdy, well-serviced neighbourhoods. The transition from one to the other is not, however, automatic; encouragement and de facto security are important.

It is important to note that owners of dwellings in many slums are attached to them in a way that formal-sector house buyers may not be. If one has constructed a dwelling on empty land and seen a neighbourhood develop and improve, there is bound to be a tie to the dwelling that is strong. In central city areas, many dwellings are steeped in family history and are precious, although they are of little value. In addition, some households are so poor that even a ramshackle shack is more than they can bear to lose.

Many of the slums are very tiny, perched on a traffic island, on a small piece of back land in the business district, next to the railway goods depot. The issues they face may have less to do with servicing, as they can often free-ride on other people's water supply and sanitation. Instead, they have greater issues of security and recognition, and concerns about who will defend them against threats of eviction. At the same time, they may be holding up important development, or creating dangers for themselves and others. The task of solving the dilemma they present for city authorities is, therefore, beset with problems.

Were all of these slums simply illegal, then the tenure issue and their security would be much clearer. However, they possess many grades of security, leaving a much more complex context of intervention for the authorities and a more difficult future of improvement or decline to predict.

This dynamic trajectory of the neighbourhood, whether it is in decline or progressing, was memorably expressed many years ago as the dichotomy of slums of despair or slums of hope.⁴ The division by potential has, thus, been influential in policy. A neighbourhood in an old city centre area, which, seeing better days, has now been converted from palatial single-household dwellings into ever-cheaper rooming houses and small apartments with shared services, requires a different set of interventions to improve residents' livelihoods from those needed for a newly settled shack neighbourhood. Similarly, a relatively new government-built estate, in which the combination of poor maintenance and multiple social deprivation leads to rapid physical decline, is very different from an area where poor quality buildings have been erected on semi-legal subdivisions.

This chapter attempts to set out the range of neighbourhoods that fall under the classification of 'slums' and presents the context in which the later discussion can be understood. The criteria used encompass such diverse characteristics as origin and age; location; size; legality and vulnerability; and development dynamic, so there will inevitably be some overlap. However, this is a way of demonstrating the diversity of slums and the need for a multitude of approaches in order to improve the livelihoods of residents.

The dynamic trajectory of the neighbourhood, whether it is in decline or progressing, was memorably expressed as the dichotomy of slums of despair or slums of hope

SLUM FORMATION PROCESSES AND SPATIAL TYPES
Despite a great range of varieties mentioned above, slums fall into two broad categories: declining areas and progressing settlements - each of which can, for the purposes of expanded analysis, be broken into:

* Declining areas:
- 'old' city centre slums; and
- 'new' slum estates.

* Progressing settlements:
- squatter settlements; and
- semi-legal subdivisions.

In different ways, all four subcategories sustain the livelihoods of the urban poor and, at the same time, exacerbate their poverty in the ways described above. However, as described in the discussion of the Chicago Model of urban change and development, their impacts on the shape of cities and the strategic approaches to improving them differ significantly. Not all central area slums and deteriorated housing estates are slums of despair, declining into worse and worse conditions. There is a cycle by which slums are demolished and redeveloped for commercial use or renovated into upper-income housing. By the same token, not all self-built squatter settlements and other informally constructed housing are on the road to becoming integrated into the regular housing stock of the city, providing adequate space, amenity and services to their inhabitants and revenue to the city.

The process of the physical deterioration of central city housing stock can be reversed through processes of gentrification

Box 5.1 Barcelona inner-city slums
The district known as the Ciatat Vella, or old city, in Barcelona was the entire city until the mid 19th-century expansion. The old city had developed very high housing densities and 'had associated problems of lack of light, air and open space. As the city expanded, the more well. off population moved out. Slum conditions developed in various areas, and continue to the present day in several neighbourhoods, such as the Barri Gotrc, Santa Caterina and the Barceloneta. The highest concentration is found in the neighbourhood, known as the Raval, and most specifically the Raval Sud, or Southern Raval. This area was traditionally known as the Barri Xino, or 'Chinatown', and, partly because of its proximity to the port. has been characterized by marginal activities and the highest levels of poverty, in the city. It has also traditionally served as the gateway for new immigrants to the city, providing cheap lodging in very poor conditions, in the form of boarding houses, dormitories, and subdivided, apartments. The buildings in this area vary in age - some are several centuries old - and the existence of slum lodgings in the area can be traced back at least to the mid 19th century.
Source: Barcelona case study, 2002.

Inner-city slums
Inner-city slums gave birth to the concept of the slum: the process whereby central, prosperous residential areas of cities undergo deterioration as their original owners move out to newer, more salubrious and more fashionable residential areas. This is a commonplace and predictable consequence of the growth and expansion of cities, manifest by both an increase in the central commercial and manufacturing areas and activities, and the influx of migrants looking for employment opportunities. Initially, the housing vacated by the better-off is still structurally sound and serviceable, and provides an ideal housing opportunity for those willing to make do with less space and shared amenities. The location of buildings provides residents with good access to employment opportunities. Since the buildings were originally built for middle- and high-income groups, they are usually reasonably well serviced with urban infrastructure, though, over time, as dwellings are increasingly subdivided and the level of overcrowding grows, strain on those services can reach breaking point.

In general, occupants pay rent and often that rent is at relatively low levels, which in some cities is controlled by legislation, typically at levels below the economic cost of adequately maintaining the building and its services. This policy of rent freezing is widely recognized as contributing to the deterioration of tenement housing, making it uneconomical for owners to invest in the upkeep of their properties.6 For example, the 1947 Bombay Rent Control Act was introduced to freeze rents at the 1940 level and to establish rights of tenants against evictions'? This meant that the construction of housing for workers became unprofitable for landlords, and also discouraged investment by owners in the repair and maintenance of existing buildings. Thus, these provisions had a negative impact on private investments in rental housing, and adversely affected property tax collection. The act was revised in 1986; later, in 1993, it became applicable only to new properties. Rent control was not exclusively applied to the city centre areas, however. In Beirut, slums generally have witnessed the development of large-scale rental markets, and renting has become, since 1982, the primary method of accessing housing and a main source of income for old property owners in slums.8

This process of the physical deterioration of central city housing stock can be reversed through processes of gentrification, as has been frequently seen in ex-slum neighbourhoods in Northern cities, where (usually young) professionals, themselves marginalized by the rising cost of 'acceptable' housing, are willing to move into a traditional slum, attracted by the architecture and cheap housing prices and, perhaps, encouraged by official renovation programmes. Gentrification can lead to a rapid shift in population, with poor tenants being pushed out to make way for wealthier occupants and new commercial and service developments - for example, in Morocco's development of medina areas in response to tourism and a conservation agenda.9 However, gentrification in the cities of developing countries has been limited, and traditional slum housing remains very much the domain of the poor.
The Chicago Model of concentric rings of city growth that sees the development of central area slums is only common to the older, larger cities of Europe and the Arab States, the Americas and Asia. In most modern African cities that were developed as part of a colonial process, the houses of the rich were large sprawling bungalows, set in extensive grounds, usually kept at a distance from the 'old' or 'native' city. Rarely have these lost their value or attraction for those who can afford them.

Even where the process of the transformation of once desirable, centrally located residences has taken place in developing countries, it represents a relatively low proportion of a city's slums. The main reason for this is the high rate and scale of in-migration over the last 50 years. The stock of central area was unable to accommodate more than a very small fraction of the migrants, even when such dwellings are subdivided to house 10 or 20 families. Bogota is one such example where the central areas represent a small proportion of the city area and population, compared with the growth of squatter settlements and illegal subdivisions elsewhere in the city.10 The strategic location of such central areas, coupled with the visibility of physical and social degradation, have, however, drawn political attention to the area and prompted intervention in recent years.
Secondly, though it took almost 100 years, most of the cities of Europe and America were able to overcome the worst of the poverty and, therefore, were able to eradicate the slums through industrialization, colonization and, eventually, prosperity. More importantly, the rate and scale of immigration and population growth was much lower than in developing countries, allowing the worst excesses of city centre degradation, to be controlled.

The relatively slow pace of economic development in most countries of the South has also meant that the central slums of developing countries have yet to undergo the next phase of redevelopment: ,the replacement of slums by newer, taller buildings, often for commercial purposes. The major exception are the capitals of the 'tiger economies' of Southeast Asia, such as Jakarta in Indonesia, that went through a rapid rebuilding and renovation boom during the 1980s and early 1990s.11

Slum estates
This category differs from the traditional city centre slum in that the structures are relatively new and generally not in private ownership. Examples include both public housing estates and housing built by industry or to house industrial workers, such as the hostels for mine workers in Southern Africa and 'chawls' in India.12 Both have experienced social problems arising from overcrowded and pressured conditions, making residents vulnerable to organized crime and political exploitation.
Ironically, in many cities, much of the public housing built between the 1950s and 1970s to re-house the residents of central city slums and squatter settlements, typically in four- to five-storey tenement blocks with minimal, if any, community amenities, has itself now joined the stock of slums. During the early 1990s in India, the Tamil Nadu Housing Board had a major programme to upgrade tenements built by the Tamil Nadu Slum Clearance Board in Chennai less than 20 years earlier. Many apartment blocks built by the Tema (New Town) Development Corporation in Ghana during the early 1970s are in a precarious structural condition. Housing and living conditions in public housing estates have been further worsened through the lack of appropriate dweller control or involvement in the day, to-day management and maintenance of either individual dwelling units or the housing estates as a whole, including their public infrastructure. Often, this has also been accompanied by the omission, closure or breakdown of common amenities and facilities, usually due to shortages of resources to address the extent of need. Another common reason for the deterioration of relatively new public housing estates has been their peripheral location on the edges of cities where land was available, but access to work, markets, kin and social amenities was not. The relative isolation of such estates meant that the cost of transport was often unaffordable to the low, income inhabitants. As a result, they became abandoned by all but the most destitute and desperate.
Slum estates also embrace tied workers' housing that was built by employers, usually state industries, for the use of their work force during the period of their employment. These estates suffered even more than public housing estates from a lack of any form of occupant involvement in their management and maintenance, leading to their rapid deterioration. For example, in Chengdu, China, now that industry is no longer responsible for ,the provision of housing, units have been abandoned and left to private residents who, facing unemployment, are unable to maintain them. As a result, they face the possibility of serious deterioration. 13

Box 5.2 Bogotá inner-city slums
The inner-city slums of j'1artires and 'Santafe are deteriorated zones in the centre of the city of Bogotá. As the city developed, some of the zones of the traditional downtown area were abandoned and progressively became occupied for low-income economic activity and
housing. The buildings are tenement: houses that were occupied in the mid 20th century by several families with independent rooms but collective kitchen, laundry and sanitary facilities. During the I 960s, the central tenement houses increasingly became lodgings for immigrants to the city, who took such accommodation for the first few years, then moved to unplanned settlements: The overuse of such houses has led to physical deterioration. Furthermore, while I tenement housing still serves as teI1Jporary lodging, this is decreasing as families who live in less central areas increasingly provide rented rooms to supplement their household income.
Source: Bogotá case study, 2002.

Box 5.3 Hostels in South Africa
In South Africa, the 'hostel' accommodation provides one of the more extreme examples of housing-turned slum. Hostels were built as predominantly single-sex accommodation to house and control (usually) male workers who were employed by institutions such as the railways, municipality or large industrial employers. The inadequacy of the buildings arises through gross overcrowding and  a high intensity of use, which, combined with a lack of maintenance, has led to rapid deterioration. However, the tensions between rival political factions particularly fuelled under the apartheid regime, have also-led to notorious violence, intimidation and power struggles. Political and criminal control over the allocation of accommodation has led to a breakdown in formal systems of revenue collection and little formal  reinvestment.
Source: Durban case study. 2002.

Box 5.4 Chawls in Mumbai, India
In Mumbai, 'chawls' were rental tenements constructed by factory owners and landowners for low-income workers between 1920 and 1956. Later, the port authorities and a few other public-sector -units began renting out similar tenements to their workers. Accommodation was designed as one room in a tenement' with shared cooking and sanitary facilities, provided to house mostly single men for nominal rents. With the consolidation of male migrants in the city, their families joined them.. Consequently, densities of these single-room tenements increased phenomenally and structures began to deteriorate rapidly. Rent control laws led to a halt in the supply of such accommodation; the same, laws led to a lack of appropriate maintenance and worsened. The degradation; and, in many cases, residential tenements were put to commercial/industrial use, resulting in excessive loading and damage to the structure. "Environmental conditions of salinity and humidity also caused damp and corrosion in the structures. With such decay and dilapidation, conditions in chawls became very precarious, some collapsing during the monsoon every year.
Source: Mumbai case study. 2002.

Box 5.5 The 'Recent public City' of Naples
The two zones in Naples of Ponticelli, in the east, and Scampia, in the North, can be termed the 'recent public city', together housing over 100,000 people. Entirely made up of housing, they were planned during the 1960s and finished after the 1980 earthquake. Both are currently subject to renewal projects aimed at transforming them from dormitory quarters into normal city neighbourhoods. These quarters share a 'bad' reputation. The decision to relocate large numbers of residents, already suffering from degrees of poverty, in a single area deprived of the social capital that they possessed their original neighbourhood couraged marginalization and exploitation. Organized crime thrives in both quarters and, opposes socio- economic development as a threat to its power over the population. The 'Sails', huge 20-storey housing blocks, were soon considered uninhabitable and two have already been demolished; the shared spaces are abandoned. The two quarters, and especially Scampia, are poorly linked to the rest of the city, and the distance from the centre presents a major problem for access to work, particularly for women.
Source: Naples case study, 2002.

Some of the public housing built between the 1950s and 1970s to re- house the residents of central city slums, typically in four- to five-storey tenement blocks with minimal community amenities, has itself now joined the stock of slums

Squatter settlements
One of the most important components of the slum housing stock, and one that has attracted the most discussion during the last three decades, is squatter housing. Squatters are people who occupy land or buildings without the explicit permission of the owner. They often differ from other informal settlements only in this particular. Thus, squatter settlements are settlements established by people who have illegally occupied an area of land and built their houses upon it, usually through self, help processes. Included in this category are settlements established illegally on pavements or rooftops. English language terms used to describe such settlements include self-help or self-built settlements; spontaneous settlements; marginal settlements; squatter areas; shanty towns; and slums. Terms in other languages include barrios, tugurios, javelas, bidonvilles, gecikondus and kampungs.
Squatter settlements are generally found in the towns and cities of developing countries. Some of them, in South and East Asia, date back to the 19th century; but most have much more recent origins. They are, primarily, though not exclusively, built on public land. They can be the result of organized 'invasions' of land, which may have occurred overnight (especially in Latin America), or they can be the result of a gradual process of occupation and incremental growth. Many land invasions and squatter settlements have grown to become municipalities in their own rights, housing hundreds of thousands of people. With them has come the commerce and services that characterize any town -although, perhaps taking a different form or on a different scale from that of the formal city. For example, Villa el Salvador in Peru started as an informal invasion of peri-urban land with pole and matting shelters in 1970 and is now a municipality of greater Lima with a population of nearly 300,000.14 Ashaiman in Ghana was a village that, during the
1960s, provided shelter for the construction labourers and port workers in the new town of Tema, and is now a thriving town of 100,000. There are also the vast inner-city squatter areas of Asian cities, such as Dharavi in Mumbai and Orangi in Karachi, each with a population estimated at over 500,000.

Although the initial settlements may have been the result of the authorities turning a blind eye, particularly during the immediate post-independence inflow of migrants to the cities of Asia and Africa, squatting became a large and profitable business, often carried out with the active, if clandestine, participation of politicians, policemen and privateers of all kinds. In most cases, the prime target was public land or that owned by absentee landlords. In many cities, the process of illegally occupying public land has become highly organized. During the 1970s, political parties and organizations in many Latin American cities used the process of organized invasions of land as a political tool to build up a constituency or a power base.
Many squatter settlements, however, are small and makeshift. They may be located under bridges and flyovers, on vacant plots of land between formal buildings, or on pavements and dry-season riverbeds. In order to diminish the chances of immediate eviction, settlements frequently develop on land that is unsuitable for any other purpose, such as railway reserves; canal and river banks; steep (and unstable) slopes; flood-prone and swamp land; and garbage landfill sites. The size, location, condition and resilience of squatter settlements will be determined not just by the characteristics of their residents, but, more importantly, by the political. context of official tolerance or intolerance towards them.

Contrary to popular belief, access to squatter settlements is rarely free and, within most settlements, entry fees are often charged by the person or group who exerts control over the settlement and the distribution of land. In Phnom Penh, for example, the majority of slum dwellers consider themselves owners of their plots; but the purchase of the plot is usually from local people with influence (such as the police, village chief and/or representatives of the Sangkat or Khan), who themselves have no prior ownership rights.15 In some cases, the bribe paid is described as a registration fee for the 'right' to settle on a piece of public land.

Within' settlements, there exists a range of actors from owner occupiers to tenants, subsistence landlords to absentee petty-capitalist landlords, and developers to rent agents and, protection racketeers. Variety also exists in their legal status; while squatter settlements begin with an illegal occupation of, land, over time some form of security of tenure, if not formally recognized legal title, can be transferred to the residents. In time, de facto legality can be implied by the simple fact of the settlements not being demolished, and/or public services being provided. 16 Since the 1970s, tolerance of squatter settlements by government and the public alike has grown and the numbers of forced evictions and demolitions have probably diminished, though they have certainly not ceased. This has enabled some of the more established squatter settlements to develop rapidly, with residents feeling sufficiently secure to invest in improving their homes and local environment. Where the state has also invested in settlements, through environmental and infrastructure upgrading projects and the provision of social services, the transformation can be such that, over time, the settlement loses its attributes as a slum. In this way, processes of gentrification can occur in squatter settlements as they do in city centre slums - although, in this case, the new occupants are likely to be lower-middle income groups, rather than an adventurous professional class.

Thus, squatter settlements in and on the fringes of cities, in developing countries play an equivalent role to two forms of housing in Europe and North America in terms of ,providing accessible and affordable housing: the conventional central-area slum housing and low-priced suburban housing. Initially tolerated as a 'temporary' phenomenon, by most city authorities, what started as a small-scale activity of largely self-built, makeshift housing by construction workers and other labourers very quickly mushroomed into a major settlement activity, far surpassing the formal housing efforts of most cities in most countries. In Sao Paulo, more than 60 per cent of the population growth in the 1980s is considered to have been absorbed 'by the favelas.17
Squatting, like living in conventional slums, provides a solution to the housing needs of those that cannot afford, or even find, alternative formal accommodation. As with conventional slum properties, some squatter settlements are cramped, high-density areas, with substandard construction and inadequate levels of services and infrastructure. For instance, parts of Huruma settlement in Nairobi have residential densities of over 2000 people per hectare in single-storey structures. I8
However, others, especially those in newly developed peripheral areas, may be much more spacious.

The poor who occupy squatter settlements are often desperate and susceptible to pressure from organized crime. Their location, lack of services and poor infrastructure leave occupants prone to disaster, disease and disability. Like central-city slum dwellers, those who live in squatter settlements are widely perceived as petty criminals or under the control of organized crime, and a threat to society; but the reality is often very different, with a broad cross-section of people living under strong local social controls.


Box 5.6 Informal settlements in Durban
As a result of the colonial and apartheid eras, the predominant form of inadequate housing in Durban, as in many other African cities, is in informal settlements that have developed on, marginal land that-formerly lay beyond the city boundaries, In South Africa under apartheid, this land was under the jurisdiction of independent' states or on 'buffer strips' between areas designated for other use and the actual city boundary. In Durban, informal dwellings act as substitutes for about 75% of the metropolitan gross housing backlog of 305,000 units. The population living in informal areas is overwhelmingly African, and, indeed, nearly half of the black population of the entire municipal area lives in informal dwellings. While, in the past, there has been extensive harassment a1:Jd physical destruction of informal dwellings, all such dwellings in existence in Durban in 1996 were granted some status and security from arbitrary eviction by the local authority. New settlement is, however, resisted by the municipality and attempts are made, with varying degrees of success, to keep vacant land free from occupation.
Source: Durban case study. 2002


Illegal settlements and subdivisions
Not all of those who live in poor-quality, under-serviced housing areas are squatters, in the sense that they are occupying land to which they do not have rights. Unauthorized land developments or illegal subdivisions are widespread on the fringes of cities. Illegal subdivisions refer to settlements where the land has been subdivided, resold, rented or leased by its legal owner to people who build their houses upon the plots that they buy. The settlements are illegal owing to any combination of the following: low standard of services or infrastructure; breaches of land zoning; lack of planning and building permits; or the irregular nature of the land subdivision. Illegal subdivisions are very common in developing countries, but are not restricted to them or to occupation by people living in poverty, as the Naples example in Box 5.7 shows.

In some cases, farmers have found that the most profitable 'crop' for their land is housing. Peri-urban land is transformed from agricultural to urban use by landowners who divide it into plots for housing. The majority of these subdivisions are done without reference or recourse to the official urban planning mechanisms involving permission fees and licenses. As informal and unrecognized settlements, they lack all but the most rudimentary public infrastructure; however, this is what makes them affordable. Nevertheless, the housing built on them, while often substantial and constructed of permanent materials, in response to confidence in the security (legality) of the land sale process, rarely meets or is subjected to building and planning regulations and permissions. Though the conditions in these settlements are usually better than squatter settlements of the same age, they tend to have high densities since little provision is made for open space or access, and the plots themselves tend to be small, with high ratios of floor space to plot size.


Access to squatter settlements is rarely free and, within most settlements, entry fees are often charged by the  person or group who exerts control over the settlement and the distribution of land

Squatting, like living in conventional slums, provides a solution to the housing needs of those that cannot afford, or even find, alternative formal accommodation

Settlements are illegal owing to any combination of low standard of serv-ices or infrastructure;
breaches of land zoning; lack of planning and building permits; or the irregular nature of the land subdivision

Box 5.7 Illegal construction in Naples
Illegal building, which is elsewhere commonly associated with slums and poverty, is actually associated with middle-class neighbourhoods in Naples. The best-known case of illegal construction is Pianura, a neighbourhood that sprung up during the I 970s and I 980s, when five- to seven-storey buildings were built without authorization from the city in an area that the zoning plan classified as agricultural. They are illegal in the technical sense of having no building permits and violating the zoning plan; but the land was legally bought by private developers who respected building standards, and homes were placed on the market at prices only slightly (15-20%) below the cost of legal units. with the connivance of the authorities, they were linked to the public water and electricity system, and later to the sewerage system. Growth at Pianura is still strong - rising from 38,500 residents in 1981 to 54,000 in 1991, with young families, productive (although undeclared) businesses and higher homeownership rates than the city average. This type of illegal construction is widespread outside of the centre of Naples, but is usually limited to the expansion or construction of single-household homes. Many residential areas, of varying scale, have appeared spontaneously throughout the city.
Source: Naples case study. 2002.

Understanding and articulating the difference between slums is critical to developing effective strategies that address the problem

In sub-Saharan Africa, customary landowners are often the main providers of land for housing, even if their right to the land is not formally recognized by the state. In many situations, the underlying issue is that customary law still applies and overlaps with statutory law. What distinguishes this form of development from squatting is that the sale of land is generally through a legal transaction, although not always formally registered. The land may not be recognized as suitable for urban development or housing, or the development may not comply with planning laws and regulations, or with norms and standards regarding the provision of infrastructure and services.
As in squatter settlements, most occupants of illegal subdivisions build, extend and improve their own housing over time, and consider themselves to be owner occupiers, which, de facto, they are. Of course, not all dwellings in such settlements are owner-occupied. There are many unauthorized land developments where there is a vibrant rental housing market, controlled both by individual plot owners and by speculative developers and agents, sometimes on a fairly substantial scale. In Nairobi, Kibera - to the west of the city - is the largest uncontrolled settlement.19 Its relative proximity to the main industrial area allows residents to save on transport costs and to walk to work; but shortages of accommodation mean both overcrowding and high rents. Illegal and informal subdivision or change of land use are not limited to land on the urban fringes. It is also common to the process of raising densities in low- and medium-density inner-city areas as households, unable to acquire new accommodation for expanding families, or in order to benefit from rental income, extend and subdivide their properties. They may build in courtyards, gardens and circulation space, add floors, or extend onto flat roofs. Where housing is owner-occupied, this process tends to occur anywhere that the authorities allow it and often involves quite sophisticated neighbourly negotiations.2o There is little evidence that such extensions lead to overloading of public infrastructure and services, although this may be expected. Where the dwellings are owner- occupied the chance of maintenance is increased.21 Where houses are rented to many households, however, it is more likely that alterations and extensions carried out by tenants will be harmful as they will have little concern for the whole building.


Box 5.8 Illegal subdivision of agricultural land around Cairo
Over half of the population of Greater Cairo resides in private housing that is constructed on agricultural land purchased from farmers in areas where there were no subdivision plans and where building permits were not given. This constitutes almost half of the residential area. Since the I 960s, small agricultural areas on the fringes of 'formal' Cairo began to be subdivided by farmers and middlemen and sold to individual owner builders.1fhis accelerated dramatically after the 1974 open-door policy was proclaimed, fuelled by ever increasing flows of remittances from the hundreds of thousands of Egyptians working mostly as labourers in the Gulf and in other oil-rich economies. Finances came from personal savings, remittances from relatives or conversion of other assets; as a result, incremental construction was a necessity. Plot coverage of 100% and incremental (room by room and floor by floor) reinforced-concrete construction are the norm. While the quality of construction of housing is generally good, there is a very common trend of increasing the density of areas over time and a parallel phenomenon of serious overcrowding.
Source: Cairo case study. 2002.


Diversity of slums' spatial forms and associated opportunities
In general parlance, and in the official language, little differentiation is made between types of substandard housing. In practice, all and any of such housing is referred to as 'slums', or 'slums and squatter settlements', or 'slums and shanties', often interchangeably. Understanding and articulating the difference between them is critical to developing effective strategies that address the problems in slums, and to support the processes of improving settlements, alleviating the impacts of poverty within them and encouraging the spontaneous improvements that may follow, increasing wealth within them.
Each slum or area of poor housing possesses a number of attributes. For example, a slum on the urban periphery or in the city centre may be well established or relatively new. It may be large or small. Each of these conditions will endow it with certain qualities that reinforce both its strengths and its weaknesses, and may increase or decrease the potential to benefit from particular forms of upgrading or other improvement intervention.
The following section discusses a framework for analyzing slums with reference to their settlement formation process, form, spatial organization and construction, strengths and weaknesses, and opportunities. A number of characteristics [see Table 5.1), used in combination, serve to identify issues pertaining to vulnerability, the social networks, physical and economic assets with the potential to improve livelihoods, and levels of and incentives for community organization and representation.

ORIGINS AND AGE
Origins and age indicate the legacy of a slum, such as its physical assets of building heritage, the root and speed of its formation, and the establishment of community. Given the pejorative associations with 'slum' discussed in Chapters 1,2 and 4, this legacy will be fundamental to determining what initiatives and momentum will be required in order to effect change. There are clearly geographical and historical regional patterns to the world's cities. Nevertheless, many cities have some combination of old established slums, which may, indeed, be the original city itself. At the other extreme, there are the slums and areas of poverty that are currently forming; and between these are the remaining settlements of various vintage and degree of integration within the city.

Historic city-centre slums
Most cities in Asia and Africa that have a pre-colonial existence, also have some or all of that original settlement largely intact. The equivalent in Latin America are the colonial pre-independence cities, laid out according to the code of La Lay de Indias. In many instances, the original city is separated from the more modern city by its old defensive wall (for example, in Lahore, Pakistan) or a moat, or it is on a hill (such as Salvador, Bahia, Brazil), and often has a distinct name, such as the kasbah [for example, in Marrakesh, Morocco) or the old city (as in Old Delhi, India). It is a distinct neighbourhood or even a sub-city within the city. Many such neighbourhoods are a mixture of grand buildings and public spaces, many in semi-ruins, others taken over for private use. Those of the original inhabitants who could afford it have moved out to the new city, leaving the odd retainer, or even some members of the older generation, too set in their ways to move. Many of the buildings and places have been subdivided and let to poor households, perhaps employed in the old businesses and manufacturing units that remain, still producing the goods for which the city was once famous.
Many established historical city cores are classified as slums because they have high residential and commercial densities and overcrowding, as well as levels of services and infrastructure only suited to much smaller populations. This Is especially evident in streets that are too narrow and irregular to accommodate cars, lorries and refuse-collection vehicles. In addition, the drains and water supply pipes often leak, and electricity and telephone cables, many of them unofficial, festoon the streets. In many, the once fashionable balconies now hang perilously, propped up by decaying posts, their facades blocked to provide additional rooms.

Box 5.9 Illegal subdivisions in Quito
In Quito, most low-income households are located on the urban periphery. in the barrios perifíricos. During the last two decades, the Quito region has incorporated former minor urban centres and peripheral agricultural areas to form an agglomeration that covers the valleys of Tumbaco-Cumbaya. Los Chillos, Calderon and Pomasqui-San Antonio de Pichincha. Settlements such as Corazon de Jesus have evolved through a process of subdivision: the irregular topography influences both development and risks to the settlement Housing is small and built with inadequate materials; some dwellings have latrines. but there is no drinking water or sewerage provision; waste collection service is non-existent or inefficient; and the main or secondary access roads and street lighting are in poor condition.
Source: Quito case study. 2002.

These are the classic inner-city slums; yet, each building often also represents a fortune, if not for what it manufactures, stores and sells, then for the rents it brings in from the many households that now share its once noble rooms. However, this economic return is often negated by rent control, which, in turn, encourages owners to withdraw maintenance and further accelerates decline. They are also often the subject of ownership disputes, feuds, claims and counterclaims. The many claimants and litigants make it difficult for these properties to be redeveloped; in the mean time, they go neglected and unmaintained. Slums of this kind are found in Karachi, Cairo and other established cities in the developing world.22
Nevertheless, these buildings, individually, and more so collectively, represent a part of the cultural heritage and generate claims for conservation, competing with those for demolition and modernization. Their strength also lies in their location within the city and in relation to the centres of commerce and production. The easy access to employment, real and potential, combined with cheap if run- down housing, are natural magnets for the poor.
The continued presence of the older generation, with ties and traditions that go back many years, is often an effective counterbalance to any socially disruptive tendencies. The continued presence of communities and community leaders, as well as the traditions and relationships between them, help to bind the newcomers, as well.
Run-down and inadequate infrastructure can be upgraded, and there are many technological advances that make this possible without endangering the structures. The inaccessibility of motorized transport may be a blessing, and the dilapidated structures can be refurbished. Very often, it is not the know-how or even the resources that prevent improvement of these areas, but the complexity of ownership and the economic risk of investing in a single building on the chances that the whole neighbourhood will be upgraded and allow the investment to be recovered. Where this does happen, of course, the poor are often denied access to affordable, centrally located housing and business premises.

Major categories of slum spatial analysis

Origins and age                                           Historic city-centre slums
                                                               Slum estates
                                                               Consolidating informal settlements
                                                               Recent slums

Location and boundaries                               Central
                                                               Scattered slum islands
                                                               Peripheral

 Size and scale                                           Large slum settlements
                                                               Medium-size slum estates
                                                               Small slums

Legality and vulnerability                              Illegal
                                                               Informal

Development stages: dynamic and diagnosis    Communities/individuals lacking incentive for         
                                                               improvement Slums with ongoing individual-
                                                               and community-led development
                                                               Intervention-led improved slums Upgraded slums


Box 5.10 Ibadan's historical centre slums
In Ibadan, the inner-city core area consists of the oldest, the lowest-quality and the highest- density residences of the city. During the 19th century, large compounds for Yoruba-extended I families and warrior lineages constituted this part of the city. The area still has a strong cultural identity based on its heritage, and the presence of non- Yorubas in this part of the city is rare. Housing is constructed of mud, with virtually no sanitation facilities. It is highly residential, up to 90% in Elekuro ward, and the simultaneous presence of many old markets and street trading in the area cause traffic congestion and exacerbate overcrowding while providing essential employment and services. The colonial area developed: beside the old city, making this area the worst case of deterioration less than 2 kilometres from the current city centre. Residents rent or squat. Some of the wealthier people of Ibadan, who were born in
the core area, have kept their family house for cultural and familial reasons, although they now live in villas in the new government estates. However, the buildings and land that they occupy remain sacred to the original owning family and it is very difficult to change them from residential use. They are of little economic value but are precious to their multiple-related owners.
Sources: lbadan case study, 2002; Amole etal.1991

Box 5.11 Old Havana
Old Havana has an irregular grid of narrow streets and small city blocks, with buildings sharing party walls and with inner courtyards: a coherent urban fabric with dominant squares and churches. As the city expanded during the 1700s, it developed typical calzadas: wide streets with tall porticoed pedestrian corridors opening into stores and dwellings above. However, in 1859, the new western suburb of EI Vedado attracted the sugar-plantation aristocracy and, during the I 920s, a further upmarket area, Miramar, was developed close to the waterfront, which deliberately lacked stores and other amenities to discourage the less affluent. The mansions of the old city were turned into stores or subdivided as tenements with shared facilities: poverty masked behind classical facades.
About half of the residents of tenements with high ceilings have built barbacoas - makeshift mezzanines or loft-like structures that create an extra floor. They are often unsafe, poorly ventilated and their bricked up windows deform building facades. Moreover, barbacoas add considerable weight to load-bearing walls, already weakened by leaks, often leading to partial or complete building collapses. Another source of extra residential space, as well as extra building weight, are casetas en azoteas - literally, 'shacks on roofs' - which are usually wooden structures built on top of multi-household buildings. The Cuban regime's encouragement of development away from Havana has indirectly helped to shield Old Havana from some overuse; nevertheless, most slums are still concentrated in the inner-city municipalities of Old Havana (La Habana Vieja) and Centro Habana. The result of density, additions and poor maintenance is regular building collapse -sold Havana averages about two partial collapses every three days. In these cases, residents are usually assigned to emergency or existing transitional shelters, but are often reluctant to go there.
The restoration of Old Havana and San Isidro started after Havana became a World Historic Heritage site in 1982. In 1993, Havana's Historian's Office was granted the right to run its own profit-making companies in the real estate, building, retail and tourism fields, and to plough back part of its earnings into restoring the historic district. In ,addition, it could devote a portion of its own resources to financing community facilities and social programmes for local residents and to repair and rehabilitate dwellings, even in non-historic areas. Most residents remain in the area, and gentrification has been avoided, to some extent, since housing for local residents is included in the upper floors of restored buildings. Some, however, are displaced to apartments built and financed by the Historian's Office, where some residents welcome the more spacious, well-equipped new dwellings, while others find commuting extremely difficult. Temporary relocation housing is sometimes provided in Old Havana itself while rehabilitation is under way. local economic development also takes place; some residents have received training and jobs as skilled construction workers for the restoration process, others have received incentives to produce crafts for sale to tourists, or obtained other employment in the tourist industry.
Source: Havana case study. 2002.

Slum estates
From the time that the old city lost its place as the centre of attraction for the rich and the affluent, and was replaced by the new city, parallel developments for the less well off have emerged. Some of these have been in the form of formal public housing estates constructed relatively recently (at least three decades old in developing countries). The vast majority of others have been older illegal and informal settlements laying claim to land deemed unfit or unsafe for planned residential development.
As mentioned earlier, some slum estates have developed where relatively new estates, usually built for renting, have deteriorated quite quickly into areas where few would choose to live, but in which many low. income households are trapped through having no affordable alternative. Examples include government-built mass public housing estates, and housing built by industry or to house industrial workers, such as the hostels and estates of small dwellings for mine workers in Southern Africa, and 'chawls' in India.23 Other examples include the 'new towns' of Cairo (Helwan, Moktam and Shubra), Ciudad Kenedy in Bogota and the large State Housing Board developments that were constructed in virtually all of the major Indian cities during the 1970s and early 1980s.24 Both have experienced social problems arising from overcrowded and pressured conditions, making residents particularly vulnerable to organized crime and political exploitation.
Another common reason for the deterioration of relatively new public housing estates has been their location on the edges of cities where land was available, but access to work, markets, kin and social amenities was not. The relative isolation of such estates means that the cost of transport is often unaffordable to the low-income inhabitants. They are, therefore, abandoned by all but the most destitute and desperate. In general, a lack of public resources is the most cited reason for the deterioration of physical conditions, as well as the conviction that, somehow, it is the culture of poverty of its residents that is the root cause.
Slum estates also include large amounts of housing built by employers as tied housing for workers. These vary from the tiny bungalows on featureless 'locations' in Southern Africa to the slab blocks in the former Communist bloc. They tend to be even more poorly maintained than publicly owned housing and may even be hated by their occupants. As many dwellings are transferred to occupier ownership, and many occupiers then lose their jobs in the decline of formal industries, conditions and the quality of life of the occupants decline in parallel. The Chengdu, China, case study shows that dwellings in public housing estates in the city are likely to suffer from serious deterioration.25

Consolidating informal settlements
Much of the urban development in rapidly developing cities of the South has been 'through informal settlements in which land has been informally subdivided and sold or leased to households who have built their own dwellings. Some of the land used in this way is deemed unsafe or unfit for planned residential development, such as the land occupied by the extensive informal settlements built on stilts over the tidal swamps of Guayaquil (Ecuador) and Cartagena (Colombia), and the Tondo Foreshore of Manila (Philippines). In some instances, it is land reserved for future development (by the sides of roads, railway tracks and canals, or even around airports and: other facilities) that has been pressed into serving the needs of the otherwise unhoused.
Over time, some of the first of these settlements have been grudgingly recognized, tolerated and even accepted, such as Policarpa Salavarrieta, a large 1960s land invasion in central Bogota, Colombia. There may have been attempts to dislodge these settlements; but there have also been interventions to improve them. Whether legal or not, their continued, presence gives them a de facto right to exist and to develop.
In many countries, traditional authority structures have powers over land in tandem with the state and its agencies. Many areas are allocated by chiefs and traditional councils with or without the agreement of state institutions. Subsequent development may conform to some regulations but many do not fulfill all of the official requirements for housing neighbourhoods. These may be indistinguishable from, and treated in a similar way to, other informal subdivisions.
Although often not as substantial as in the more established slums, the majority of housing in informal consolidated areas, is built of durable materials, though the piecemeal construction and improvement of such areas have given them a more chaotic (or organic) overall appearance than in formally developed areas. There are fewer public facilities, such as schools and playgrounds, and few formal commercial outlets than in the established slums. There are manufacturing and marketing activities; but these tend to be small-scale, family operated enterprises. Similarly, though generally fairly accessible by road and public transport to the periphery, the internal streets of these settlements tend to be less adequate.
The general level of earnings and incomes is not the lowest, with more owner occupiers and self-employed residents than in newer, poorer settlements. The potential for improving such settlements is generally high as a result of the greater perceived and, to some extent, real benefits from upgrading for the residents. The most frequent constraint is the planning and zoning legislation that the settlement contravenes, even though, in practice, the city government has learned to accommodate and adjust to the presence of these consolidating slum settlements. This occurs as it becomes apparent that political opposition militates against the demolition of such slums, and it is, therefore, in the interest of the city that they should be absorbed within the formal housing stock and improved in order to maintain the land values of the areas that surround them.

Box 5.12 The medinas of Morocco: Rabat-Sale
The deterioration of some parts of the two medinas (the old neighbourhoods of the pre- colonial c1ty) finds its origin, as in other Moroccan cities, in a double loss of affection: that of a housing model abandoned by middle-and well-off classes, who migrated to new neighbourhoods, and that of' economic activities and craftworks that move elsewhere. The former leads to the densification and pressure on building fabric, and the latter directly impoverishes community members. In the twin cities of Rabat-Sale, rental, room by room, has led to rapid deterioration, and renewal movements are slow to appear. In other cities, concern for the historic building fabric bas taken precedence over the livelihoods of the poor within them, and' the policy was initially to 'depopulate' in order to promote the district for tourist. But greater recognition of socio-economic aspects is leading to investigation of alternatives. Some commercial and service activities .remain, along with a number of craft 'businesses. However, those activities have been widely supplanted by the illegally built neighbourhoods in Rabat: Hajja and Maadid, and in Sale: Hay Inbiat. Thus, while the medinas at the moment continue to constitute a source of informal, irregular and provisory employment, for residents, the threats to livelihoods are yet--to be addressed.
Source: Rabat-Salé case study, 2002.

Recent slums
Recently developed slum neighbourhoods are often similar to the consolidated informal settlements, but are newer and unconsolidated. Their newness is expressed in poorer, less permanent materials, especially in settlements where residents are unsure of whether and for how long they will be allowed to stay before being evicted. In cities where evictions are common, or on sites where they are unlikely to be left alone, shacks are likely to be very rudimentarily built of recycled or very impermanent materials (such as straightened oil drums, used corrugated metal sheets, plastic and canvas sheets, cardboard cartons and discarded timber).
Where authorities are more tolerant, or where such settlements are the norm for establishing new neighbourhoods (for example, around Lima), or if there are about to be elections, then the settlers are likely to build with more confidence, using more permanent materials and standards of construction. In either case, infrastructure is likely to be absent or only available through clandestine connections.

In general, a lack of public resources is the most cited reason for the deterioration of physical conditions

The potential for improving consolidated slums is generally high as a result of the greater perceived and, to some extent, real benefits from upgrading for the residents

Box 5.13 Consolidating Favelas in Rio de Janeiro
The Favelas of Rio de jagneiro have appeared throughout the city since the 1950s.There are - now about 7OO-and they house an estimated I million inhabitants. The favelas are frequently on hilly sites and are primarily located in the suburbs, where public utilities are rarely available
and environment conditions are poor, owing to few connections to trunk infrastructure. Access to bus routes is reasonable; but they tend. to be far from employment opportunities.'z' The dwelling is considered to be owner-occupied, though there is no security of tenure on the land, the Favela movements of the 1970s and 1980s have helped to consolidate settlements and, the de facto tenure, and a policy shift from the settlement removal to upgrading has encouraged structural improvements as residents expect to remain there permanently.
Note: 'z' However, tile location of some high up. overlooking the beautiful-Atlantic coast and the rising sun. became valuable, briefly as they were' rented out to richer households wanting to celebrate the sunrise on the Millennium dawn.
Source: Rio de Janeiro case study. 2002.


Box 5.14 Consolidating informal settlements in Bogota
Bogota has had more than ;four decades of urban growth, largely based on illegal development; although there are squatter settlements, Bogota's slums, for the most part, have their origins in illegal subdivision. The localities of Ciudad Bolivar, Bosa ana Usme are examples of , slum' areas that, in their first stages of development, Jacked water, drainage, sewerage and power infrastructure, along with education and health care&facilities. However; the settlements have undergone consistent gradual improvement.' partly through the installation of public services and. the construction of roads, with the support of the city's administration and sometimes with the participation of the residents, and partly through individual initiatives of developing dwellings and space for informal economic activity.
Source: Bogota case study, 2002.

Box 5.15 Recent slums in Phnom Penh
Around 230,000 people or one quarter of Phnom Penh's inhabitants currently live in low- income communities or slums. All live on marginal, seasonally or permanently flooded land, or in multi-occupancy dilapidated buildings in the city centre. The rationale behiniill1)ost locations is access to work. They are convenient for access to the city centre, main markets or the railway station. 35% of low-income settlements in Phnom Penh are located on 'empty' land, some 26% on riverbanks and canal sides, and the remainder are along railways and on roadsides, or on rooftops. The areas for settlement lack road access, water and power supply, sewerage and drainage, and are often insaluorious, situated above sewer lines, or near or on dumpsites. The public land on Which settlements have developed includes relatively wide streets, railway tracks, riversides, and boengs (water reservoirs ,used to irrigate farmland during the dry season).
On private land, small clusters of households have settled in alleys of high-income districts, while other groups live as squatters in dilapidated, multiple-occupancy buildings -in the centre of the city, where owners wait to sell the building for commercial development. Many people who-lived in centrally located squatter settlements have now been evicted to the periphery to make way for commercial development: Thus, while squatter settlements developed primarily in the city centre until 1998, recent massive relocation programmes have contributed to establishing peri-urban zones of poverty. Allegedly, these relocations have also created more rental communities in Phnom Penh slums, as some relocated households cannot find work near relocation sites and have returned as renters in squatter settlements near employment areas.
Since 1995, rural migrants have developed squatter areas on the rural fringe of the city, on public land unsuited to construction where they expect that long-term occupation may provide them some tenure rights. Increasingly, the urban poor also informally purchase plots on the rooftops of large, mostly government, buildings where they live as squatters relatively close to their place of work. The settlements within or on top of old buildings have been created since !985, when occupation rights were granted to aUinhabitants.fIJ1hese rights are not ownership rights, and inhabitants could and' evicted but they are recognized. as stable residents and have a greater compensation. Renters in Phnom Penh are either seasonal migrants who have a dwelling in the countryside and come to the city for a short time, or they are the poorest of the poor, who cannot afford to purchase a dwelling in a squatter settlement. They are under constant threat of eviction by their slum landlord. Single women head many of the renting households.
Source: Phnom Penh case study, 2002.

New or recently established slums tend to have lower densities as there are fewer constraints and less competition for the land; yet the individual plots and parcels occupied by each dwelling are unlikely to be any larger than in the more consolidated slums. This is because households tend' to occupy only enough land for their individual needs, rather than explicitly seeking to profit from land holding and development.
Recently developed slums are generally found on the periphery of the built-up area of the city, or in pockets of even more marginal land than the more established slums. Increasingly, occupants of the newer slums often use the grid-iron layout, even without the assistance of external organization and support. There are several advantages in adopting grid layouts:
* It is easy to layout.
* There is a stronger likelihood of obtaining urban services and recognition if the settlement is orderly. * There are likely to be fewer disruptions and demolitions when services are installed.

LOCATION
To some extent, as has been indicated above, there is a correlation between age and location, with older slums in the city centre and the newest on the periphery. Although this follows from the realities of a growing city, it is not always the case. For example, with a relatively young, but fast-growing, city, the oldest slum areas may well be outside of the centre. Regardless of age, the location of the slum endows it with certain attributes.

Central
As mentioned in the section on 'Inner-city slums,' central- city slums tend to have been formed by the classic process where central, prosperous residential areas of cities undergo deterioration as their original owners move out to newer, more salubrious and more fashionable residential areas. Initially, the housing vacated by the better-off, which generally has reasonable infrastructure and services, is idea! for those willing to trade off less space and shared amenities in exchange for access to employment opportunities.
Centrality of location does not necessarily imply the old city, or the central business or commercial centres of cities. As used here, it also embraces formal industrial areas, ports, wholesale markets and other areas of employment that are some distance from the central business district (CBD). Residents of slums that are located close to such zones are )
able to benefit from the high concentrations of employment opportunities, especially those related to unskilled and casual jobs. They are also likely to be better off in terms of transportation because of the tendency for cities to grow outwards radially and, therefore, to have roads and transport converging on centres of formal employment. This makes centrally located slums much more suitable for unskilled workers. If the neighbourhood originated in the old city centre, then it may also have the benefit of substantial buildings and a reasonable level of infrastructure and services, though it may have fallen into disrepair and infrastructure may be severely overloaded (see the case of Havana in .Box 5.11).
The historic cores of many ancient cities (for example, Delhi, Dhaka, Cairo and Istanbul) are now in much reduced circumstances and would fit the description of city-centre slums; but these are dealt with separately as historic city slums.
As mentioned in 'Inner-city slums' on page 80, much of this housing is controlled by rent control legislation, which fixes rents at levels that are affordable by some measure, but which are usually unrelated to the value or replacement cost of the accommodation or to the economic cost of adequately maintaining the building and its services. Introduced in many countries during World War II, or in the economic upheaval caused by it, rent control is now widely recognized as contributing to the deterioration of the housing to which, it applies as owners remove value from it by withdrawing maintenance or by converting it from residential to other uses (for example, cheap boarding houses).26
In West African cities, central areas are often dominated by traditional housing that is owned in common by many members of one lineage and is occupied by elderly or poor family members. This 'family housing' embodies a curious contradiction: it is both precious and valueless. It is sacred to the family and, thus, is precious. However, it suffers from multiple occupation by the people least able to
maintain it; but it is not for sale and therefore is unlikely to develop into commercial or other uses to make economic use of the central location. Indeed, because of this, CBD functions tend to be spread around the city. These circumstances are unlikely to change without a major reappraisal of the ,function of housing in West African urban societies. This, in turn, could generate serious dysfunctions, which may be inimical to the cohesion of families and society there. Especially at risk are those who need the social safety net that free accommodation in the family house provides.27 Centrally located slums are most prone to being controlled by organized racketeers through their control over jobs, as well as property. The extent to which the favelas of central Rio de Janeiro, Brazil, are controlled by drug barons is legendary.28 The majority of slum central-area dwellers tend to be wage earners, and are either on piece rates or are casually hired. The majority of them are tenants, renting or subletting from slum landlords, rather than owner occupiers living in dwellings that they have built themselves. In more socially and economically mobile cities, notably in Latin America, many central-area slum dwellers, over time, move out to new and more peripheral locations, seeking less precarious and more permanent housing. They are the most likely candidates for official slum relocation programmes as they succumb to pressure and enticements from better-off households who want to move into the central locations once they have been improved or, in the more developed cities of the North, as part of the process of 'gentrification'.

Box 5.16 Centrally located slums in Colombo
The settlements commonly referred. to as 'slums', 'tenement gardens' or 'mudukku' in Colombo are the old deteriorating tenements or subdivided derelict houses located on high lands in the old parts of the inner-city areas. These old tenements were erected to accommodate the influx of a new labour force into the city during a period, when a thriving plantation industry required labour for processing, packaging and storage, as well as handling and' shipping. Tenement units normally consist of a single bedroom, a small veranda and a living area with common water taps and latrine facilities. They were usually built in back-to-back rows, on a block of land commonly referred to as a garden; These so-called tenements contain anything between a group of or three units and a few hundred.
Old residential buildings, mainly in older parts of north and central Colombo (for example, Pettah, Hultsdorp and Wolfendhal) were also turned into apartments for low-income workers. They were subdivided into small units, inadequately maintained and largely deprived of basic sanitary facilities.
Source: Colombo case study, 2002.

Scattered slum islands
Scattered throughout cities are 'islands of slums', surrounded by formal housing and other officially sanctioned land uses. These islands may have been intended as open or green spaces, as the land was thought to be unsuitable for future housing, or locations that are physically or environmentally unsafe. Slum islands are typically small, as few as eight to ten dwellings. They often get their water from fire hydrants or neighbours in formal areas and dispose of their waste, both human and refuse, in the city's gutters and open spaces. They cannot support their own social infrastructure (school, clinic, etc); but use the facilities of the neighbourhoods in which they are located - unless they are denied access through social discrimination, which is quite common.
Slum islands that are closer to the centre share many of the advantages and attributes of the central slums described above. However, they are often physically isolated from the surrounding areas by barriers such as canals, storm drains, railway tracks or motorways, and, though close to urban facilities and opportunities, may not actually be able to benefit from them. Some islands may have started as rural communities that became engulfed by urban expansion; but this is rare, except towards the periphery.


Box 5.17 Centrally located slums in Sao Paulo
In São Paulo, corticos (rented-rooms in a subdivided inner-city tenement building) are the
traditional form of central slum housing. Most corticos are located in the central districts of the city, in areas that are deteriorated. but near the city's jobs and services. Sacrifices of cramped, unhealthy and expensive housing are compensated for by the proximity of work and services.
Favelas sprout everywhere: In wealthy areas, poor areas, in the central region or in the periphery, wherever there is an empty and unprotected lot. Their appearance during the 1970s and 1980s mixed up the pattern of centre-periphery segregation in Sao Paulo. Public authorities constantly repressed and removed favelas in the areas valued by the market. The action of private property owners in regaining possession; moreover, has driven Favelas to the poorest, most peripheral and environmentally fragile regions. Few remain in well-served regions, although the largest two, HeliÓpolis and ParaisÓpolis, are located in these areas.
Source: Silo Paulo case study, 2002.


Box 5.18 Scattered slum islands in Beirut
In Beirut, in the Eastern Quarter, Hayy el Shaqi is located on an island in a major traffic intersection, below street level. One of the poorest settlements in the city, it was established during the I 950s after residents were displaced from a nearby zone where they had been squatting. Its residents originally came from Jabal el Druze (they were Syrian nationals from the Druze confession). Then, after 1982, most Syrian households left and were replaced by other foreign workers- Sri Lankans, Egyptians, Kurds and others. There are around 50 residents who run shops on the street. Construction is precarious, and this is the poorest of all of the city's slums. Dwellings are built with tin, wood, plastic sheets and other reused materials from the years of the Lebanon civil war. Being below street level, the slum also suffers from poor drainage, and several people have drowned there on days of heavy rain.
Source: Beirut case study. 2002.

Large slum settlements cannot rely on the services of the settlements around them and need their own, even to the extent of internal public transport systems.

Peripheral
Slums on the city fringes are, as described above, either squatter settlements in which households have invaded (usually public) land, or they occupy land that has been subdivided and for which they have paid or entered a rent- purchase arrangement with the developer or landowner. The urban periphery has distinct advantages over more central and urbanized areas as there is less competition for the use or control of land, especially if it is located outside of the municipal boundaries. Peripheral slums can be quite large settlements since they are rarely constrained by competing development.
In many cases, the quality of housing is relatively good - significantly better than is to be found in the adjoining rural areas - but the level of services is generally low. While this is not a great hazard to health and amenity when the overall density is low - as it can be during the early period of development - it can become a serious problem as the slum grows larger and denser. While dwellings are often owner-occupied, in many cities the provision of housing in peripheral settlements is controlled by a 'developer'; a well- connected businessmen or politician who has the necessary power and resources to layout and allocate land.
An overriding problem facing peripheral slum dwellers is the low level of access and high cost of transport to jobs, markets, schools and the centres of administration of public services. Thus, households living in peri-urban areas can spend up to 30 per cent of their incomes on transport, or as much as three to four hours a day walking to and from work and school. Increasingly, middlemen are beginning to realize the potential offered by the women in these settlements by offering them piecework, bringing in the raw materials and collecting the finished products.
One of the main problems of home-based piece. working (home-working, as it is called in the literature) is that the 'invisible' workers can easily be exploited since control by labour authorities is very difficult.29 When workers are scattered around new, unmapped areas, control is even more difficult, so exploitation is easier. In addition, the further that potential workers are from their jobs, the easier it is for exploiting employers to flourish.
A very significant feature of informal settlements on the urban periphery is their potential for efficient and effective upgrading through the provision of infrastructure and public services, especially if it is done before dwellings consume all of the available land. Increasingly, NGOs recognize this and are developing strategies to help new land invaders and informal developers to impose some discipline in the subdivision and layout of land in order to prepare for the installation of public infrastructure.


Box 5.19 Peripheral slum islands in Ibadan
Unplanned areas along the major roads in the outskirts of the city grew during the 1990s - notably, to the north, east and south of Ibadan. Some 30% of this informal unplanned housing is found more than 5 kilometres from the centre. While the inner-city slums have a predominantly Yoruba population, peripheral slums and their migrant settlers are much more heterogeneous in terms of ethnicity, religion or profession. Population densities in the outskirts are less than in the inner city, with a high turnover of occupants. The rental market thrives; landlords are often wealthy and living in other parts of town, settlement is generally based on access to employment and other major activities. Agbowo, for example, is close to the university and is inhabited by students and junior staff. However, the shortage of accommodation on the university campus has resulted in a rental market where more than three students, on average, share a room, with up to eight students sharing in some cases. Housing conditions are also quite different from the inner city... dwellings form a. heterogeneous pattern, built of cement, wood, or mud with cement plaster. Like the inner city, however, there is no potable water provision, water disposal or drainage, only occasional electricity supply. Routes are mostly impassable by motor vehicles.
Source: Ibadan case study, 2002.

SIZE AND SCALE
The size of a settlement or slum area has obvious implications for what is, or is not, possible in terms of social organization, community cohesion and future intervention,

Large slum settlements
There are many slums around the world that are equivalent to cities in size. Dharavi in Mumbai, India, or Orangi in Karachi, Pakistan, house hundreds of thousands of households; Kibera in Nairobi, Kenya, has a population of 400,000 people.30 To a large extent, this is a function of the size of the city of which they are part. However, it is possible for a slum or informal settlement to be larger than the city upon which it depends. For example, Ashaiman (in Ghana), referred to earlier, has a larger population (150,000) than Tema (140,000), the municipality of which it is formally part. With such large slums, the need for local management and social organization becomes clear. Many different social groups may live and work within the slum's geographic boundary. While some large slums, such as Antop Hill in Mumbai, India, are organized spatially on ethnic lines, it is important for groups to cooperate with each other, whether or not it is traditional for their people to do so. Large slum settlements cannot rely on the services of the settlements around them and need their own, even to the extent of internal public transport systems.
With large numbers of slum dwellers, even though they are poor, there are substantial economies of scale and viable internal markets. It is possible for as many as 40 per cent of the population to find employment servicing and serving the needs of their own neighbours. The markets that spring up in large slums often attract custom from the surrounding formal settlements, as the produce tends to be cheaper than in formal-sector markets. The impacts and implications of such trends were discussed in Chapter 4.

Medium sized slum estates
This is the most common situation, with neighbourhood. sized settlements developing in and around the city. The process of deteriorating conditions that led to falls in land and property values is self-perpetuating and, in many cities, relatively rapid. Of course, given the higher density of most areas that house the poor, a relatively small piece of land is required to house a community. Most often, the origins of such settlements is land that has been undeveloped or abandoned, since it was felt by the urban planners and developers to be difficult, if not impossible, to develop. These areas include swamps, marshes and steep slopes.
Medium or neighbourhood-sized slums are quite effective in resisting attempts to demolish or relocate them. In part, this is because they tend to form a cohesive community who support an active internal leadership, and because there are sufficient households to ensure that they have enough political and voting power to generate external political support.

Small slums
Scattered throughout cities are small, or even very small, slums that are surrounded by formal housing and other officially sanctioned land uses, sometimes on land designated for public or communal use, but most often on land left as reserves for future development or to serve or service roads and highways, waterways or railroads. The sites may have been intended as open or green spaces, or land thought to be unsuitable for future housing, or classified as locations that are physically or environmentally unsafe. These very small pocket-sized slums, characterized earlier as 'scattered slum islands', often contain as few as eight to ten dwellings. In many cases, occupants of neighbouring upper-income housing areas tolerate, or even protect, such slums as the residents often work as their domestic staff and other employees. Because of their small size, they cannot support their own social infrastructure (school, clinic, etc); but residents have easy access to public services from the neighbourhoods in which they are located. Sometimes, however, this is denied because of social discrimination. Where such settlements are not protected by their neighbours, they are vulnerable to exploitation and are ineffective at resisting eviction or relocation. These very small pocket-sized slums are often attractive to their residents because of their closeness to the centre. In the major cities of South Asia, very small pocket-sized slums occur through the occupation of pedestrian walkways. In Mumbai, India, it is estimated that there are more than 20,000 pavement dwellers who live in dwellings built on the pavements of the city centre, with residents using part of the carriageway as living space during the day.31 Many of these dwellers have been there for 20 years or more.
Because of their small size, these slums have easy access to public services from the surrounding areas. On the other hand, where they are not protected, their small size makes them vulnerable to exploitation and less effective at resisting eviction or relocation. This precariousness is often responsible for the lack of substantial investment in housing, most of which is usually made from second-hand or recycled materials and components.

Box 5.20 Karachi: women's access to employment
The Khuda ki Bustee housing in Hyderabad, Pakistan, is located on the Karachi-Hyderabad Highway, on the edge of the city limits. While men were able to work, women were unable to find any employment locally and readily welcomed the approaches of middlemen to undertake piecework. Though this provided them with an income, the bulk of the money was kept by the middlemen. Consequently, when a local non-governmental organization (NGO) with experience of similar activities in Orangi, Karachi, offered to take on the role of the middlemen in providing raw materials and delivering to markets, the women joined readily, and now receive much more for their inputs. Similar stories of women succumbing to low wages are found in many low-income settlements in Pakistan, where the seclusion of women makes it difficult for women to enter the open labour market.

The markets that spring up in large slums often attract custom from the surrounding formal settlements, as the produce tends to be cheaper than in formal-sector markets

Box 5.21 Mexico City: Valle de Chalco Solidaridad
Valle de Chalco Solidaridad is a municipality that was created during recent years following massive settlement... in this case, in the agricultural municipality of Chalco, to the south-east of Mexico City. Agricultural land was originally appropriated after the construction of a canal during the 19th century. After the Mexican Revolution, the haciendas and other large agricultural properties were expropriated and distributed as 'ejidos', or agrarian communal properties,to the local communities.
By the late I 970s, Mexico City's growth began to affect the Chalco area. On the one hand, the demographic growth of the local communities meant that agriculture was increasingly unfeasible as a means of subsistence, on parcels of ejidal land averaging 1.7 hectares per household. On the other hand, demand for housing meant that the illegal sale of this land was an attractive proposition. In the case of Chalco, before 1984, many of the transactions were not handled by the ejidatarios themselves but by professional intermediaries or developers who bought the land from the individual ejidatarios, parcelled it out into lots of mostly between 120 and 250 square metres and sold them on credit. By this means the settlement process began between 1970 and 1980, when the population of the area now included in Valle de Chalco Solidaridad almost doubled from 44,000 to 82,000 individuals, living in about 18 colonias. During the following decade, it increased still more to about 220,000 reaching over 323,000 individuals in 2000.
The state embarked on an extensive regularization process, and a survey in 1998 found that 90% of the plots in Valle de Chalco had been regularized. Once this was underway, material improvements could be financed by the new federal poverty programme 5olidaridad, which invested 407.9 million pesos (about US $160 million) in Valle de Chalco between 1989 and' 1993, including street lighting, water mains and schools, then electrification, hospitals, pavements and main drainage. However, this regularization of tenure, public works and social investment programmes, as well as an influx of national and international NGOs and religious groups, is not reflected in the 2000 housing indicators: 78% of the dwellings have no inside tap; 40% have corrugated cardboard' roofing; and 20% have only one room. Today, Valle de Chalco still contains some of the worst housing conditions in Mexico City.
Source: Mexico City case study, 2002.

Box 5.22 Mumbai: Prakash Nagar Pavement Community
This settlement originated 35 years ago; by 1998, it had 300 households who were made up of different ethnic groups. Most workers have daily wage-based activities on construction sites or domestic work. Dwellings are small and consist of plastic sheets precariously arranged on wooden poles. The community has faced demolition three to four times a year since 1985, generally without notice, including finally being evicted for the construction of a flyover in 1999. However, the community struggled to retain their foothold and has re-housed itself on a nearby privately owned plot, wishing to live in the vicinity in order to sustain livelihoods. Many households have filed applications for the necessary 'photo pass' in order to validate their residence in the community since 1994. Currently, the community is counter-claiming at the local courts and the National Human Rights Commission against their treatment by the authorities.
Source: Mumbai case study, 2002.

The threat of eviction is probably' the most potent force in galvanizing communities - it
can help to transform a heterogeneous group of households, settled in a particular locality, into a community

The informality that makes it easy to access land in these settlements and to build dwellings may make it more difficult to obtain credit or to transfer Of sell these rights to others

LEGALITY VULNERABILITY AND SPATIAL FORMS
As has been pointed out above, not all slums are squatter or illegal settlements, and not all illegal or squatter settlements are slums. Therefore, legality and resident perception of its relative vulnerability are important considerations, both to the process and nature of viable development interventions. Indeed, it is commonly held that legality, or security of tenure to land and property, is the single most important criterion in any slum upgrading or regularization process.

Illegal
There are settlements that are illegal, either because they are squatter settlements, without the right to be on or use the land, or the land on which they are settled has not been designated for housing and related activity in the statutory land uses of the city. Few cities in developing countries actually have up-to-date statutory land-use or zoning plans. In theory, residents of illegally occupied land are very vulnerable to being evicted as they have no right to occupy the land. However, what usually matters more, in practice, is the extent to which legality is enforced - and this may be not at all.
The literature on slums has made much of legality and the threat of eviction as the key to determining the level and extent of investment and other decisions. In practice, while the threat of eviction makes an enormous impact on the perceptions and, therefore, the behaviour and priorities of the slum dwellers, not all of their actions are governed exclusively by it. The threat of eviction is probably the most potent force in galvanizing communities - it can help to transform a heterogeneous group of households, settled in a particular locality, into a community. However, while the actual threat is there, it is likely to divert attention away from more long-term or development-oriented activities. If the threat is withdrawn, however, the community may be sufficiently enabled by the experience to undertake more development activities that require a collective effort, investment or the pooling of resources.
Many slums are built on land that is designated for housing, and the occupiers have a legal right to be there, However, the layout or type of housing may not have been given formal consent; often it may not have been sought! Essentially, dwellings in this type of settlement do not comply with municipal regulations. Consequently, these settlements may be denied access or connections to the urban infrastructure, or they may not have their land, title registered or recognized. This will make it difficult or impossible for residents to obtain any form of certificate of title, access to housing finance and other such facilities. Thus, many settlements are unable to develop beyond basic structures and householders cannot use the value of their property as collateral for credit to invest in enterprises or development.

Box 5.23 Phnom Penh: living in the grounds of a pagoda
A settlement of 60 households has developed along a dirt lane leading to the pagoda because of the proximity to the city centre and jobs. Most heads of households are unskilled construction workers or vendors, and find work on nearby construction sites and markets. To settle on this public land, each household had to pay a bribe of US$10 to US$20 (approximately, one week's earnings) to the Sangkat authority as a 'registration fee'. The majority (around half) live in low-quality shelters with roofs and walls of palm, floors of recycled plywood, and doors and shutters of leaves. Around one third live. in better dwellings with zinc roofs, thatched walls, wood floors, palm doors and shutters, and equipped with a bed, a table, a few dishes and pots, and a stove. The remainder are the poorest, often widows, sleeping on floors, living in shacks made of palm and old rice sacks, with no door or window, and furnished only with basic cooking utensils.
Source: Phnom Penh case study, 2002.

Informal
In many countries, the process of registering title to urban land and obtaining permission to develop it is a relatively recent introduction. Therefore, as has always happened in many rural areas, households settle and construct their dwellings without any thought to their formal recognition. For this reason, many well-established settlements are considered informal - this is a common occurrence in the peri-urban areas of many African cities. Thus, strictly speaking, these are illegal settlements; but, in practice, it is unlikely that urban authorities would test this in court and they prefer to adopt a more tolerant, laissez Jaire approach. However, the informality that makes it easy to access land in these settlements and to build dwellings may make it more difficult to obtain credit or to transfer or sell these rights to others. While generally constraining, this has advantages in that it makes it equally difficult for settlers to give up their land at a lower-than-market price to cash buyers who are more aware of the potential of the particular location.

DEVELOPMENT DYNAMICS
Even within similar common geographical regions or contexts, settlements that share common characteristics in terms of age, origin, location and legality may still vary considerably. Different drivers and dynamics of development, both from internal (community) and external (NGO or other agency interventions) will render living conditions vastly different.
The first ,two criteria within this category are based on the community's inherent perception of, and attitude towards, their ownership of the physical environment based on the origin of that settlement. The second two criteria cover the impacts of external or 'upgrading' interventions.

On going Individual and community-led development
Individual or household-led development is manifest in very many slum areas. Without perceived security of tenure, access to some means of generating livelihoods, and the necessary capacity to manage threats such as environmental hazards, the majority of slum dwellers are unlikely to make incremental improvements to their own housing and living conditions.
The extent to which there is community cohesion and organization to undertake broader development initiatives that serve the wider neighbourhood depends, partly, on the social structures of the neighbourhood and, partly, on either a supportive or a benign attitude by the authorities - which gives residents confidence that there will be no eviction. Where other settlements have experienced upgrading and improvements, there may be spin- offs as other neighbourhoods emulate the improvements. However, where settlements have been regularly subjected to evictions and demolitions, there may be a reluctance to take any action that would bring the neighbourhood to the notice of the authorities.

Intervention-led improved slums
These are settlements where some intervention has been made to improve one or more aspects of the settlement, housing or social and economic facilities and opportunities; however, they have not had a complete upgrading project. The actual impact of such interventions is liable to vary, depending, in :part, on what has been improved or introduced. More importantly, perhaps, is the way in which the improvements were performed. Often, they are part of a local politician's efforts to improve his/her standing and to win votes. This may have been done in a way that residents feel was only, necessary; rather than being grateful, residents may see it for what it is: a bribe. Many settlements are very well aware of their voting power in countries where elections are regular occurrences (such as in India).
Ironically, where these improvements have been the result of a struggle that has taken time and effort, it probably also helps to create a greater sense of community. The resulting improvements, therefore, are more likely to have an enabling effect, empowering the residents to increase their efforts to further improve the settlements.

Upgraded slums
These are slums that have been the subject of a fairly comprehensive upgrading and improvement programme, whether gradually over time or as a one-off intervention. Nevertheless, the intervention may not have reversed the basic conditions, or - if it did - there is no guarantee that improvements will last long. Furthermore, improved conditions can serve to attract more households to the settlement, increasing pressure on the housing and services to create, once again, slum-like conditions.
It is also often the case that, while a settlement may have had a project or a programme of upgrading, in practice, the application of the funds and efforts were superficial, and much of the funding might never have reached the settlement. In some cases, where such insensitive upgrading occurred, the neighbourhood condition has been worsened by it. 32 Most city authorities now recognize the need to address the problems of slums and squatter settlements in their cities and to do so in partnership with residents.
There is another possibility where, although a slum has been upgraded, the residents refuse to acknowledge the upgrading - not because the improvements have not happened, but because there are often positive-discrimination measures that benefit the slum dwellers who would lose those benefits if their settlement were no longer a slum. On the other hand, the fact that the settlement was once a slum may carry a stigma, that residents may not be able to shake off, even after the settlement has been upgraded.
Upgraded settlements are likely to have much better facilities after, urban services than other slums. They may also have had/the benefit of cash handouts or access to loans and other forms of financial assistance that would have enabled the residents to improve their housing and, indeed, their means of earning a livelihood. They may, even, have been 'promoted' out of slum status.

Box 5.24 Illegal districts in Rabat-Salé, Morocco :
Illegal districts in the Rabat-Salé agglomeration have housing varying from concrete versions of traditional buildings to poor-quality dwellings. they are built on purchased plots of land, but without appropriate permits. Because they are illegal, these districts are also often deprived of the basic infrastructure but conditions vary considerably. Older housing estates, for instance Hajja and Maadid in Rabat, appears less 'planned', but now include gardens and market gardens.
More recently, larger settlements have been informally 'designed' in anticipation of achieving
legal status. they appear similar to legal housing with respect to street network, division into blocks, and size and homogeneity of plots of land. Such is the case of the most recent part of Hay lnbiat and Oued ed behheb in Salé, or of Sidi taibit. The last is a huge housing estate whose environment, currently, greatly benefits from its proximity to the rural environment.
Source: Rabat-Salé case study, 2002.


Box 5.25 Informal areas in Cairo
In Cairo, informal area have developed in former desert state-owned land. the history of the settlement varies according to location. For example, Manshiet Nasser began as a relocation site for slum dwellers and garbage collectors, and Ezbet EI Haggana began as a hamlet for the households of coast guard soldiers stationed- nearby. However, in each case, a tore settlement was allowed to take, and expanded as the neglect of the government towards its own property became apparent. Usually, quite large plots on the fringes of the established core were walled, and then sub-parcels would be sold by these pioneers to other settlers. The rate of growth of individual communities varied greatly, with spurts of expansion at certain periods quite common. The development process was completely informal, with no legal paper work and total reliance on personal trust, mediated, when necessary, by the existing community, referred to as a 'hand claim' process. Although these areas are
technically illegal, settlers have certain customary rights derived from interpretations of those portions of the civil- code pertaining to hand claims on desert and Residents tend, to amass either the receipts from paying tahkir (a nominal rent imposed by a Governorate's Amlak (Properties) Department) or awayyid (property tax), from electrical connections, and from other items to establish as much paper legitimacy as possible.
Source: Cairo case study,2002.

<0 aopl Summary of opportunities linked to tenure
 

Box 5.26 Mexico City: Ciudad Netzahualcóyotl
Ciudad Netzahualcóyotl is a vast irregular settlement built on the Texcoco lake-bed. Since the draining of the lake in 1900, a series of government acts that dealt with selling and regaining the land, coupled with the existence of historic titles, rendered the legal tenure situation of plots and properties complex and ambiguous. However, the first settlements came about in the I950s, after speculators 'sold' unserviced plots for development Subsequent resale was legal in the sense that development was authorized by the state government However, at the same time, this was illegal, because building failed to comply with state regulations for urban services-paved roads, street lighting, water and sewerage mains and areas for public facilities. Nevertheless, hundreds of thousands of unserviced plots were sold and resold to create a rectangular grid of plots averaging 150 square metres. Towards the end of the I 960s, the population was approaching 600,000.
Over half of the population was in 'colonias', without any form of drainage or water supply. Severe conflicts arose out of the irregular tenure and multiple sales of the same plot of land. The colonos (settlers) organized on a massive scale to form what was one of the first urban movements, the Movimiento Restaurador de Colonos, demanding incarceration of the land developers for fraud, expropriation of the land and regularization of tenure, together with the introduction of services. After a decisive monthly payment strike, the federal government stepped in with a solution that would eventually meet the demands of the colonos, but at a price. Some of the developers were jailed for fraud. But most of them cooperated with the government, putting their stake in the land - their portfolio of credits - into a specially created trust, Fideicomiso de Ciudad Nezahualcóyotl (FINEZA), set up in 1973, which would effectively regularize 43 of the 83 colonias in the municipality. After lengthy negotiation, an agreement was reached in 1977 on payments and, a year later, over 60,000 properties were regularized trust, was abolished, and the portfolio and functions were later handed over to the state government organization, Comisión para la Regulación del Uso del Suelo del Estado de Mexico (CRESEM). Under CRESEM, regularization accelerated: by 1991, titles to a total of 159,000 lots had been issued. By the late I990s, only an estimated 12% of the plots in Netzahualcóyotl had irregular land titles.
Most of the colonias in the municipality had electricity by the early 19705, However, street lighting, paved roads, water and drainage were only introduced after the regularization process was under way, starting with the main thoroughfares. By 1980,mostof the streets were paved and supplied with main water lines and drains. During this time, the population doubled to over 1.3 million, due to the influx of households who could pay higher prices for serviced land, and also to the proliferation of rented housing of all categories. During the I 990s, the population actually fell as Netzahualcóyotl was the principal exporter of population to other areas of Mexico City. The resident population is now highly mixed, as is the quality of housing: 63% of dwellings have inside tap water, for instance, while 15% have poor-quality roofing.
Consolidation resulted in more than improvement - albeit unequal- in housing conditions and diversification of social class. Over the past two decades, trees, banks, shops, offices, libraries, schools, universities, cinemas and even McDonalds have all appeared on the main streets of Netzahualcóyotl, which also has its own cathedral and Olympic sports stadium. What was once considered a 'slum dormitory' is now the place of employment of 262 thousand people: over 4% of Mexico City's economically active population.
Source: Mexico City case study, 2002.

Lacking community incentives for improvement
There are instances when residents expect slums to provide only t-he bare minimum in terms of shelter, and the individual residents and owners have no incentive to undertake improvements. Where residents are temporary, pay little rent, do not feel part of a community network, and where the building itself is owned by an (absentee) landlord, there is little reason for individuals and households to invest in order to, improve those living environments. The owners also often have little incentive, owing to rent control legislation, or where the asset no longer has economic potential in terms of location near industry. In the case of industry-provided housing - for example, chawls in India, hostels in, Southern Africa - the building fabric does not easily lend itself to affordable conversion and upgrading.

Incipient slum creation
Where poverty is growing, there is a high probability of slum appearance, Many established historic city slums and others in the of cities fit this description. Where there is multiple ownership through inheritance (for example, family houses and old tenements), occupants are likely to be too poor to carry out, major renovations and owners are unlikely to agree to pay, especially where rent control is in force. It is estimated that 5 per cent of Moscow's housing stock of 'first-generation' prefabricated apartment blocks built at the end of the 1950s falls into the category of housing that is in urgent need of replacement or upgrading. More than 318,000 households live in such housing. Box 5.27 gives additional details in this respect.
The deterioration and degradation of such housing estates has been hastened by the poor quality of construction and materials. In many instances, especially in Soviet-assisted and inspired economies, where prefabrication and mass production were widespread, poor attention to design details and the lack of adequate site supervision during the construction phase accounts for much of the rapid and dangerous deterioration in both structures and cladding. Around one third of Moscow's housing stock is of mass-industrial housing production built during the period 1955 to 1970. It is primarily located in the mid-zone between the central and peripheral districts. Typically, five-storey prefabricated concrete buildings, some 40 per cent of them, suffer from engineering and construction faults.33<0 aopl

Box 5.27 'Incipient Slums' in Moscow
After Perestroika during the 1990s, Moscow's city authority experienced for the first time the difficulties of dealing with an influx of economic immigrants, particularly from. former Soviet , Republic states. Refugees and homeless beggars began to crowd railway stations, airports and  subways, and migrants to the city sought temporary accommodation in 'squatter flats' and, to
a lesser extent, in abandoned buildings awaiting, demolition. The squatter flats are often in former municipal dormitories or barrack built in and around industrial zones in the middle belt of the city, during the I950s, in order to provide temporary shelter for in-migrant workers, called obscl1agi (Russian jargon for 'dormitories') Almost 700 dormitories currently exist, typically four- to five-storey high 'brick buildings but occasionally one- or two-storey wooden or brick-structures with ,a rudimentary infrastructure. They are overcrowded with . Present-day residents pay very little or no
renting illegally and waiting for the alternative of state housing
or support. Poor maintenance and vandalism has hastened their deterioration; but employers
(they should, by law, provide accommodation for the incoming workers, such as a room or an
apartment) have no incentive to invest in the repair and maintenance of buildings if they
recognize that-the housing is 'dilapidated'. The backlog of housing in Moscow, however, is such that municipal housing has along waiting list and people will continue to live in deteriorated
Source: Moscow case study, 2002.
 
NOTES

1. This chapter draws on an initial draft prepared by Patrick Wakely in collaboration with Babar Mumtaz  and Kate Clifford, Development Planning Unit, University College ,London, UK,
2.  See Chapter I,
3.  Tipple, 2000;
4.  Lloyd, 1979,
5.  See Chapter 2,
6.  Tipple and Willis, '1991; Malpezzi and Ball, 1991.
7.  Case study -Mumbai, 2002.
8.  Case study -Beirut, 2002,
9.  Case study -Rabat-Salé, 2002.
10.Case study - Bogoti,2002.
11.Case study - Jakarta, 2002.
12 Case studies -Durban, Ahmedabad, Mumbai and Chengdu, 2002.
13 Case study - Chengdu, 2002.
14 Case study - Lima, 2002,
15 Case study - Phnom Penh, 2002.
16 Payne. 2002,
17 Case study - Sâo Paulo,2002,
18 Case study - Nairobi, 2002.
19 Case study - Nairobi. 2002.
20 A S Dasgupta, New Delhi, pers comm, based on his work in public housing in Kalkaji and Lakshmi Nagar.
21 Tipple, 2000.
22 Case studies - Cairo and Karachi,2002,
23 Case studies - Durban, Ahmedabad, Mumbai and Chengdu.2002.
24 The extensive literature on segregation, spatial isolation and social exclusion in European cities includes Anderson, 1999; Bolt et al, 1998; Harth et al, 1998; Krantz et ai, 1999; Lee, 1999; Lee and Murie, 1999; Madanipour et al,1998; Musterd and Ostendorf, 1998; Power, 1997; Taylor, 1998.
25 Case study - Chengdu, 2002. 26 Tipple and Willis, 1991; Malpezzi and Ball, 1991.
27 Amole et al, 1993.
28 Case study - Rio de Janeiro, 2002.
29 Boris and Prugl, 1996,
30 Case studies - Mumbai, Karachi and Nairobi,2002,
31 Case study - Mumbai, 2002.
32 Case study - Mexico City. 2002,
33 Case study - Moscow, 2002.

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