This project entailed remodelling the interior of part of the ground floor of the "Commanderie Saint-Jean" that houses the Ecole Nationale d’Administration (France's prestigious civil service college) in Strasbourg. In parallel, an extension was added to the west of the historic building and connected to it via a first-floor walkway. The four façades of the extension use the same architectural vocabulary, reinterpreted according to their orientation and overlook. They are mainly made up of timber-frame walls, except the stairwells and ground floor level, which are made of concrete, a material that is more resilient to damage and allows the structures of the living wall to be attached to it. This means that the façade can stand proud of the main structure. The simple massing sets off the lecture hall and the walkway connecting the extension to the existing building. Solar panels have been installed between the windows of the south façade, creating an interplay between opaque, transparent and reflective surfaces.
The ENA was one of the first buildings in France to be awarded NF HQE Bâtiment Tertiaires certification.