Situated on the edge of the old village centre of Allschwil in Switzerland, these two blocks of terraced houses were laid out at an angle to each other. One group comprises five units with a floor area of 135 m² each; the other contains four houses 158 m² in area. The staggered facade heights reflect the topography of the slightly sloping site. A large communal landscaped space was created instead of the usual private gardens. In each of the houses, however, there is a 15 m², two-storey-high patio, glazed on three sides and with a glass roof. These spaces serve to articulate and illuminate the 16.45-metre-deep dwellings. The party walls, the walls flanking the sanitary cells, and the patio columns are the only load-bearing elements. This allows maximum flexibility in the layout.
