Sustainable new construction project

Am Kehlberg residential complex

Modern housing with energy from deep underground

As general contractor, PORR was commissioned by BK Immo Vorsorge Projekt am Kehlberg GmbH & Co KG with the planning and implementation, including building services and electrical engineering. The result is a residential complex consisting of six individual buildings with a total of 29 residential units – a project that impresses with its well-thought-out structure and ecological energy concept.

On a plot of land measuring around 7,753 m², the complex offers a total living space of 1,963 m². Residents have access to 54 parking spaces: 36 underground in a parking deck, 12 covered and 6 outdoor spaces. The project thus combines comfort and functionality with harmonious integration into the green surroundings of Kehlberg. A special feature of the complex is its sustainable energy and heating system. Heating and cooling are provided by a deep probe field with 14 boreholes, each around 115 metres deep. In addition, a 100 m² solar system and a photovoltaic system with an output of 30 kWp ensure an environmentally friendly and efficient energy supply. The construction work also reflects the highest quality standards. A total of 2,400 m³ of concrete, 190 tonnes of reinforcement, 4,000 m² of semi-precast element ceilings and around 13,000 HLZ bricks were used. The foundation was constructed using 750 running metres of SOB piles and 1,100 running metres of ductile piles – a solid basis for durability, stability and energy efficiency. 

With the Am Kehlberg project, PORR Bau GmbH is sending a strong signal for sustainable construction and modern living in Graz. The project stands for future-oriented construction, ecological responsibility and high living comfort – another contribution by PORR to sustainable urban development in Austria.