Am Hirschfeld

The ensemble consists of three five story structures divided into two terraced buildings and one atrium house featuring a landscaped inner courtyard. The development provides 110 residential units featuring a mix of Smart apartments and subsidized rentals along with an integrated four group kindergarten. Located in Vienna’s 21st district, the project harmonizes a village style atmosphere with the expansive forests and meadows bordering the site to the north.

To combat urban heat, the design prioritizes high thermal mass over complex mechanical systems. The building itself serves as an active thermal regulator, minimizing operational energy requirements by integrating climate control directly into the architectural fabric.

The reinforced concrete structure amounting to approximately 8,800 cubic meters acts as the primary thermal storage. This Thermally Activated Building System or TABS is powered by geothermal probes, heat pumps and onsite photovoltaics. By leveraging thermal inertia to buffer peak loads, the need for mechanical building services is reduced to a minimum.

In line with circular economy principles, all resources are documented in a material passport. This ensures that components such as precast concrete elements for balconies and staircases can be easily separated and recovered. This meticulous documentation provides the foundation for effective urban mining at the end of the building lifecycle.