Acquired by a young couple with two children, the house is located along the Lake Geneva in Switzerland, in the small village of Corseaux. During the same decade of Le Corbusier’s “VillaLe Lac”, the dwelling shows an architectural style that differs from the neighbourhood, halfway between the typical Swiss chalet and the halftimbered house. Nevertheless, it is listed, like the entire district in the inventory of Protected Swiss Sites. The intervention respects several criteria, particularly on sensitive subjects such as the addition of new skylights and the replacement of all the windows. After discussion with the section of monuments and sites, the dormers are precisely proportioned and the windows carefully chosen to enhance the house. On the attic floor, the master bedroom offers a view on Jean Tschumi’s Nestlé building and the Alps. From the bathroom, the new dormer window opens it on the famous Lavaux vineyard (protected by UNESCO since 2007). On the ground floor, a sharp and simple woodwork unit divides the space into two, offering open shelves for the living room and cabinets serving both for the kitchen and dining room. Finally, on the first floor, the bathroom has been completely redesigned and all the rooms have been renovated.