New Construction and Renovation of the Pirna Tax Office

For the Pirna Tax Office, the new three-story building and two historic structures—the former Liebenau estate and the orphanage—have been combined into a single complex. With a usable floor area of 4,450 m², the complex now features offices, meeting and training rooms, as well as a visitor area, mailroom, and archive for approximately 300 employees.

The existing, historically protected buildings were thoroughly renovated and remodeled. A maximum of the original structure was preserved while simultaneously pursuing an aggressive redevelopment of the existing buildings. The new sections were primarily constructed using a joint-free reinforced concrete method and decoupled from the existing buildings via structural joints. To meet the requirement for a short construction period while strictly adhering to the budget, many tasks were carried out in parallel for the three new building sections (North, Central, and South).

Local foundation reinforcement in the existing buildings was achieved using micro-drilled piles, while the foundations for the North and South sections were constructed using partial-displacement drilled piles. The building loads for the Central section are transferred by the elastically supported floor slab. In the basement, a “gray tank” with fresh concrete composite membranes ensures the highest user requirements for the archive space.

The three blocks are arranged around an inner courtyard and are integrated into the urban context as a link between the medieval city center and the suburbs. The Central section is connected to the South section via a connecting corridor on the first floor.

The roof landscape, which spans all buildings, unites the old and new sections into a continuous structure. The roof structure in the North Wing is designed as a hybrid construction of steel and reinforced concrete elements, while the other two building sections feature solid construction.

Under a large protective roof, the tiled gable roof of the Vorwerk was reconstructed based on the historical model, and the wooden beam ceilings featuring 17th-century paintings were restored.

Both exterior and interior feature a blending of old and new at the points where they meet. The choice of materials and the attention to detail in their execution continue the dialogue between old and new. The facades of the new building consist of locally quarried Posta sandstone, while the roofs are covered with handcrafted zinc sheet metal.