This small building, with four apartments and offices on the ground floor, was built by an association of four tenants. Its conception was therefore based on the particular desires of individuals and their families rather than on a set of social conventions. The enterprise nevertheless led to the creation of a kind of “manifesto” in five points. The first two points concern the circulation spaces and the entrance, which is considered as an element intended to connect the apartments to the street rather than to separate them. On the main facade, a curved staircase opens the landing on the street and avoids the narrow and dark corridors. The third point is to avoid poorly defined and ambiguous outer spaces, easily neglected and neglected, and has resulted in the creation of a courtyard planted with trees and flowers. The other two points concern the layout of the apartments themselves, the fusion between exterior and interior and flexibility. The living / dining rooms span the entire depth of the building, with windows open on two sides that allow for aeration and light through. In order to achieve maximum flexibility, the architects have avoided the unnecessary divisions between the private and the reception areas as well as the unusable spaces because they are too small – the balconies, for example, are spacious and connected to living rooms in such a way as they seem to enlarge the surface. In section, the interweaving of the plans further enriches the three-dimensional quality of the space, three of the four dwellings extending in duplex above or below. Two apartments have offices: the fourth floor has its office on the upper level, in a room on the roof terrace; that of the first floor at the lower level, near the entrance. The first floor apartment, which occupies two entire levels, has double-height living rooms crossed, at the level of the rooms, by a corridor in the form of a bridge that connects two staircases; another external staircase connects the balconies on both levels.