This database has been produced for the purpose of a project comparing suburban spatial structure of planned development in the Los Angeles region. The main goal was to investigate large subdivisions, planned residential developments, gated communities in a post-suburban realm, in a comparative perspective. The database allows to document the impacts of spatial structure (gated communities, enclosure, seclusion within dead-ends streets) on socio-economic homogeneity. Major descriptors of homogeneity have been measured with housing price and socio-economic characterization of residents (segregation patterns). It contains 2418 features, distributed as polygons and points ESRI shapefiles. This project has been funded by the French National Agency for Research (ANR), in a collaboration with Institut Paris Region.