ABSTRACT
This chapter discusses the population and housing system in Paris region over course of half a century and at two levels: the macroscopic level of the whole and the microscopic level of the household, according to its particular conditions in terms of age, generation and residential path. Housing is a sphere that carries important social issues. For a human person, housing is the privileged space of domestic life and the intimate setting for the household to which they belong. Housing shelters people and facilitates the basic biological needs, as well as communal living, if the household includes several people. The economic challenge is therefore present, especially since the urban area is larger and more populated. Individual dwellings or collective residences are durable objects that must be planned in order to ensure quality of use, technical robustness and environmental performance in both the construction and use phases.
