Dynamiques résidentielles dans une ville ouest-africaine : déterminants du statut d'occupation du logement à Lomé (Togo)

«Adequate shelter for all and sustainable settlements development in an urbanizing world», strategy adopted in 1996 at the World Summit Habitat II of Istanbul and expressed in the Millennium Development Goals and now in Sustainable Development Goals, aims to provide a decent housing for the greatest number of households in the world and especially in sub-saharian African towns. Since then, access to adequate housing becomes an important issue for housing research in developing and sub-Saharan African countries where most of households still live in abject conditions of lack adequate water and sanitation services which, among others, typify the acute housing crisis they are facing up to. Housing policies and literature generally promote homeownership as the panacea to solve this size of the housing shortage. Assuming that this housing crisis in West Africa, especially in Lomé the capital of Togo, should be explained by the residential behavior of the households, who are self-help promoters in majority, this doctoral thesis try to answer the following general research question: Are the residential choices in Lomé, especially tenure choice, exclusively influenced by the occupier households’ characteristics? By a mixed approach of urban ecology based on multinomial logistic regression cross-study analyses applied to three data sources (RGPH4 2010, QUIBB 2011 and 2013 field survey data) supported by the life histories concerning the residential strategies of a sample of 411 households in four areas of Lomé chosen as empirical basis, the research confirms more or less the assumptions made, by the following main results: In connection with the general low residential mobility that characterizes the residential patterns in Lomé, households make their tenure choices through especially upward trajectories by developing strategies of «small steps», more according to their demographic profile (stage of life cycle, age, gender, migratory and marital status, type, size) than their  socioeconomic status (income, employment, education). These residential choices are also determined by the characteristics of the existing residential parks (typology, location, access to basic services of housing). We find that owner-occupiers are often bi-parental households headed by men, older and larger than renter and free-holder households in Lomé. Native and long-term migrant households are more likely to be homeowners and long-term sharers than those who recently migrate. Homeowner households are overall well-off than free-holders, but they are not necessary wealthier and better educated than the renters. The thesis also shows that family house which mainly makes up the residential park of Lomé, is especially kept for renters, although it shelters households of all the tenures.  We suggest that steady programmes of housing finance systems extended to all the sectors of the society, concentrated on the access of the current housing stock to basic services and on the supply, with the public technical support, of an improved version of family house, will largely contribute to offer a decent housing to most of the households in Lomé as elsewhere in West African cities, whether they are owner-occupiers, renters or sharers.

Keyphrases: Residential choices, Residential preferences, Residential strategies, Residential mobility, Residential trajectories (careers), Tenure choice, Owner occupier (homeowner), Renter (tenant), Sharer (free holder), Household's housing