International audienceSince 2001, the City of Paris has led an ambitious policy of producing social housing in well-off neighbourhoods to accommodate working classes people. This article analyses the effects of this residential strategy in terms of relations to the local territory and of the “otherness” of these new residents with the focus on the perceived and experienced cohabitations which are structured in the context of imposed diversity. A sociological survey in social buildings of the 8th arrondissement shows that these people are strongly dominated by the social relations of race and class as they are articulated within the territory itself. They adapt more or less easily and differentially according to their social and residential ...