Informal Settlements, Housing and Urban Governance

What informal settlements are and why they exist. Around one billion people live in settlements built without legal title, planning permission or formal services. They exist because cities in lower-income countries grow faster than formal housing can be built, formal housing is priced far above what most migrants can pay, and the informal economy that employs them is concentrated in central areas. An informal settlement is therefore a rational response to a housing market that has no product for the poor — not simply a failure of planning. It is also, contrary to the stereotype, often a place of intense economic activity, dense social networks and incremental improvement by residents over decades.

The costs. Insecure tenure means residents will not invest in a house that may be bulldozed. Lack of water and sanitation produces disease; lack of drainage produces flooding; dense timber and tin construction produces fire; settlements on steep slopes and floodplains produce landslide and flood deaths. Absence of addresses excludes residents from banking, formal jobs and public services. These costs are real, and a good answer neither romanticises informality nor treats residents as a problem to be removed.

Three responses and their track records. Clearance is cheap, fast and visible, so it is popular before major events. But residents do not disappear: they rebuild on worse land, lose their social networks and often their jobs, and a decade later the city has a new settlement in a worse place. Relocation to peripheral estates provides better housing with title, but 25 km from central jobs; when the two-way fare eats 30% of income, families sell or rent the new flat and return, and the estate decays into a peripheral ghetto. In-situ upgrading — secure tenure plus basic services (water, sewerage, drainage, paths, lighting) — is slow and unphotogenic, but residents who are certain they will not be evicted invest their own money in their homes, keep their jobs and networks, and within a decade the area becomes an ordinary neighbourhood. The Favela Bairro programme in Rio and Baan Mankong in Thailand are the standard examples.

Governance matters more than money. Upgrading succeeds where residents are organised and participate in design, where land title is actually issued rather than promised, and where the city commits to maintenance. It fails where it is imposed, where title is withheld to keep leverage, or where the site itself cannot be made safe — a slope that will slide, a floodplain that will drown — in which case relocation, done with jobs and transport in mind, is the right answer. The evaluation point is that the decisive question is whether residents keep their livelihoods and networks; housing quality is secondary, because a house is replaceable and a location near work is not.