PETERSENARCHITEKTEN stand for buildings that grow with their use and can react flexibly to new requirements. This was also the case with the DECATHLON headquarters in Herne – completed more than 20 years ago, we sat down with DECATHLON Germany once again and took stock. In close consultation with the management and staff, we developed an overall concept for building optimization that not only includes a sustainable energy concept, but also expansions and adjustments to the available space.