Flexibility is central to the sophisticated space allocation plan. For future tenants and their rental premises this means easy participation in decision-making with regard to room design, not only before construction begins, but long-term variable options – anytime! Long-term flexibility and neutrality of use: the modular office format also permits later individual changes that can be modified without much effort at any time. In addition, the concept of reduction to only a few, simple structural elements and connections and using them in large numbers results in an economy of costs. Longevity is an essential factor when contemplating efficient sustainability.