The project consists in a semi-detached house for a single-family with a guest-room. Situated in a very sloping street of the district of Cointes in Liège. The structure is composed by half-floors distributed by a central stairwell used as light shaft. The back yard contains two differentiated spaces. One who's an intimate space for the guests and the rest of the garden is dedicated to the permanent residents who also can benefit the terraces on the roof.