The first and second floors have been renovated and converted into office spaces. The add-on space on the third floor is home to two architectural firms. Each level is independent of each other, with their own private entrance, thanks to the construction of a "totem," which accommodates the vertical flow as well as the technique necessary for the daily operation of the building.

The add-on space is a steel structure composed of porticoes. They are arranged in adequacy with the structure of the existing frame, which makes the front facade look like a regular frame. Gabled terraces, a suspended mezzanine, and double heights compose and animate the workspaces.

An all-height library runs along the south facade to minimize direct solar gain while the space opens largely to the north by a fully glazed facade, bringing a significant and constant natural light.