The main mass of the building has three floors. There is a receding fourth floor on the side of the Adelaarslaan, thus the highest volume of the building is situated on this main road. The mass in the Eendenweg is built away from the road; this is also where the main entrance is. An independent building of two floors closes Ibis square in the same way the existing building does. The guiding principle in the architectural design is the brick shell of the building. This shell is integrated into the existing situation. By elaborating the various parts of the shell of the building in different ways, it has been made to fit in with the surroundings. For example, the part situated in the Adelaarslaan is broken by three larger gaps with loggias behind them, whilst an almost identical copy of the existing facade has been made on the side of Ibis square. The brick shell does not surround the whole of the building, but winds around and through it, as it were. The result is a separated-joined engagement between the shell and the volume surrounded, which has been executed in ceramic elements. The plasticity of the whole, the linking of surfaces and volumes in a composition and the materialisation of this forms a modern interpretation of the building style of the Amsterdam School.