Residential and office building | Landshut

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New residential and office building

ALN has completed a new residential and commercial building after three years of planning and construction. The building is located on the edge of Landshut‘s Gothic town centre directly on the castle hill and at the foot of Trausnitz Castle. Previously, the existing office space in the adjacent historic barn building was no longer enough. The three-storey reinforced concrete building, clad with bare corten steel, houses an architectural office, another office and a penthouse apartment. In the basement there is an underground car park with 15 parking spaces. The project was completed at the end of 2017.

The building concept envisages a monolithic cubature that harmonizes with the natural surroundings of the castle mountain. The central idea was the planning of a building that is sustainable at all levels: clear design language, use of recyclable materials, avoidance of composites, use of regional building materials, reduction of energy consumption.
The entire basic building structure including a flat saddle roof in solid construction consists of reinforced concrete in exposed concrete quality. Ceilings and roofs are equipped with concrete core activation. The building shell consists of a corten steel cladding that forms patina over time and adapts to the topography. The alignment of the individual storeys follows different contour lines of the mountain and offers different perspectives on the old town of Landshut through large window fronts. The various floor plans range from closed to open spaces and the transition from inside to outside is seamless.

The greatest challenge in development and planning was the handling of the existing topography of the castle mountain with its 70% slope inclination. In addition to the static challenges that were solved by means of slope stabilization, the planning team was confronted with large amounts of leaking slope water during the removal of the slope. This water proved to be a stroke of luck and is now used thermally for heating and cooling the building, thus supporting the sustainable building concept. The heating and cooling of the building is carried out by a concrete core activation system, for which the existing slope water is collected and passed on in a collecting tank and feeds the heat exchanger and heat pump. In this way, the building can be cooled or heated cost-effectively.