National audienceUrban sprawl constitutes a specific case of urbanization that is currently common in French cities. Arising from significant development of suburbs, it inevitably leads to the increase of built-up surfaces in every periurban area. At the same time, we can assume that urban sprawl induces over-consumption of space. This assumption is tested on the three main towns of Franche-Comté, that are associated with very different geographical, demographic and industrial characteristics (these characteristics are briefly described). The study confirms, in general, the reality of over-consumption of space, dependant on urban sprawl ; it seems generally independent of the individual characteristics of each studied area.L'étalement urbai...