Surroundings. On the highest point of Werder Island, near Berlin, are four buildings of very different styles: a Neo-Gothic Belvedere, an Art-Deco villa, a stable building with an attached Neo-Classical facade, as well as a bungalow from the German Democratic Republic (East Germany) era on the neighboring property. The Haus am See is situated on a slope facing the river Havel. Nestled in between the four other houses, it tells the story of a stone found, as it has always been, without style or form, which has been converted into a house. The stone is a hollowed-out concrete body into which openings have been cut.

Expansion concept. In contrast to the solid concrete block, the rest of the structures are made of wood. All the construction materials remain visible. Free-standing partition walls made of wood subdivide the interior and wooden window frames protect against the weather. A wooden pavilion has been placed on the roof. The surrounding terrace offers a view of the passing Havel river. A wooden staircase, which also serves as a bookshelf, connects both floors. The large sliding doors provide access to the stone outdoor pool and the garden which slopes down to the river.