Located on the banks of the river Seine, facing Ile Saint-Germain, the project meets the requirements of highly demanding sustainable development specifications. With their simple geometry, the specificity of the housing units lies in the handling of the external spaces which extend beyond the facades to create zinc “boxes” positioned to take advantage of the views and sunlight. The use of a concrete double wall, providing both an attractive finish and insulation, is a first for this type of high density program. To ensure urban coherence, the residential hotel is constructed from the same materials. The three buildings create transparencies through a patio opening onto the river Seine.