The project "New Town Hall Langenhagen" includes the extension and renovation of the existing town hall in Langenhagen. The existing building will be preserved with regard to its load-bearing structure and façade and adapted to the new spatial requirements in the interior. The area of the existing council hall with associated foyer, meeting rooms and underground car park will be demolished. The 5-storey extension building is being built on the section adjacent to the existing building on Konrad-Adenauer-Straße and connects to the existing building via two floors in the area of the council hall foyer to be demolished. The new underground car park will be connected to the existing cellar via two entrances (north and south). The maximum planned building height of the new building is 18.55 m. Thus, the construction project is a special construction in building class 5. 153 parking spaces will be built for the construction project. 28 parking spaces are located in the parking lot of the eastern forecourt, 125 parking spaces are accommodated in the underground garage.

The construction project will be realized in two construction phases: In a first construction phase, the new part will be built. After completion and occupation of the extension, the existing building will then be renovated.

- ca. 391 Fensterelemente, festverglast, b/h = 2.025/2.98 m;

- approx. 335 elements with ventilation wing. w/h = 0.675/2.98 m;

- approx. 81 elements with fixed sash, w/h = 0.675/2.98 m;

- approx. 464 m² aluminium mullion and transom façade;

- approx. 311 m² of aluminium curtain walls;

- approx. 93 m² Dachoberlicht;

- approx. 206 sun protection systems w/h = 1.87/2.80 m;