This housing unit includes two atmospherically contrasting sites: on the one hand an urban square, accessible from the street with four green intarsia planted with herbaceous perennials and ornamental grasses, inviting to rest. On the other hand an open space shaped as grove of maples, ash trees, Ginkgos and lime trees. The lawn of this area - serving as playground as well - follows a kind of camouflage pattern, which offers an attractive view from the upper floors. This green area passes like a plant carpet over its western facade to the roof garden in the first floor, where the play area for the toddlers is located.