The proximity of the building to the important historic monument Nymphenburg Palace meant that no alterations could be made to the street face. As a result, natural lighting for the attic storey could be drawn only from the garden side. A large, glazed upward extension of the façade was designed, supported by a new steel frame structure. The loads imposed by the posts of the steel frame counterbalance the cantilever moment of the steel beams supporting the escape balcony along the façade. The solar screening system fixed along the eaves is of similar design to the escape balcony.