The project breaks down the volume defined by the urban master plan (16.5 × 106 m) into three distinct sequences. Dividing the linear form into three modules with heights decreasing toward the south helps minimize the building’s massing effect and reduces the shadow impact on the neighboring houses.
The central pavilion creates a break in the linear composition — a breathing space that marks a point of passage. It is framed on either side by the north and south modules, which share an identical composition, and is set apart from them by a recessed façade line. Its treatment contrasts with the rest of the building: fully transparent, it is lifted off the ground to form a large porch — a passageway between the Lilas neighborhood and the bus station. Suspended metal gardens are installed every other floor, altering the perceived scale and creating a planted foreground. This garden pavilion establishes a “green” continuity through the building, linking the park to the west (along the bus station) with the park to the east (along the housing development). The crossing thus becomes an open sequence, visible from afar.
The building offers a variety of spaces extending from the offices, allowing people who work there to move throughout the day and even work outdoors. The roofs alternate between terraces and gardens, onto which shared spaces open. A system of staircases connects all terrace levels, making it possible to move from one to another. On the north side, a winter garden with a very light glazed façade — single glazing with sliding openings — provides an indoor-outdoor extension to the office floors.
The ground floor accommodates retail spaces and functions open to the neighborhood.
From the first floor upward, the building’s structure is primarily timber. It consists of wooden columns, steel beams spaced every 5.4 meters, and CLT floor slabs. The steel beams help reduce the number of columns required. Stair and elevator cores are made of concrete and provide lateral stability. The façades are timber-framed, fully prefabricated, and assembled on site in 2.7-meter-wide modules.