The planned new building for the Documentation and Information Center (DIZ) in Stadtallendorf will be constructed next to the registry office and the police station. The building will have three stories, with the basement and ground floor connected to the existing buildings. The new building will be constructed using a sustainable hybrid construction method combining wood, clay, and concrete. This targeted use of materials according to their characteristic properties results in a construction method that is not only ecological but also economical. To meet the requirements for robustness and durability, the lowest floor, which is buried in the ground, will be constructed of reinforced concrete; the elevator core will also be built of reinforced concrete to provide structural reinforcement for the building. The structural system typically consists of a conventional construction comprising floor slabs, columns, and wall panels. Conventional flat reinforced concrete floor slabs are used in the basement; in the upper floors, timber ribbed slabs and solid timber slabs are planned. For fire safety reasons, the stairwells are also constructed with reinforced concrete slabs. The interior walls are primarily made of reinforced concrete. The exterior walls of the basement are constructed of lightweight concrete. Wood is the primary material used for columns in the upper floors. Due to the location of the timber structure within the building envelope, chemical wood preservation is completely unnecessary. The exterior walls will be constructed as rammed earth walls, which will serve both load-bearing and non-load-bearing functions. The entire new building is designed to be jointless; no expansion joints are planned between individual building components and areas. In general, the jointless construction method results in robust, durable, and low-maintenance structures. The entire structure is braced against horizontal loads, such as wind, by a sufficient number of reinforced concrete wall panels and solid wood panels. To transfer the acting horizontal loads to the bracing walls, all floors and the roof structure are designed as slabs. The building is founded on an elastically supported floor slab.