Groundbreaking ceremony for climate-conscious residential project ‘Zwei bis Neun – Wohnen am Rosenhügel’

Swietelsky Developments is building 130 apartments in Vienna-Liesing that will be powered by an innovative energy system combining heat pumps and geothermal energy. The historic “Kleinbahn” factory is also being revitalised. Construction is scheduled for completion in summer 2027.

 With the official groundbreaking ceremony, Swietelsky Developments has now given the go-ahead for the ‘Zwei bis Neun – Wohnen am Rosenhügel’ residential complex. Four energy-efficient new buildings are being constructed on the site of the former “Kleinbahn” factory in Vienna-Liesing, comprising a total of 130 apartments, ten of which are renovated existing apartments, as well as nine office and commercial spaces for local amenities and services. At the same time, the well-known “Kleinbahn” factory is being carefully revitalised and given a new lease of life with a modern attic extension. Around 3,000 m², or about half of the site area, will remain undeveloped. This will create spacious open and green spaces, including two children's playgrounds.

Special attention is being paid to sustainable energy supply: the project relies on an innovative energy system consisting of heat pumps and geothermal energy with 30 geothermal probes, each reaching a depth of up to 150 metres. In addition, photovoltaic systems with a total output of 40 kWp are planned for the roofs of the new buildings. All flats have underfloor heating, which can be cooled in summer. This enables the complex to achieve excellent energy ratings and an almost CO₂-free supply.

Swietelsky Developments also focuses on quality when it comes to fittings: real wood parquet flooring, porcelain stoneware, designer sanitary ware and high-quality fittings, as well as radio-controlled sun protection, are standard. Each flat has a balcony, terrace or loggia, some with a garden area; the attic flats are equipped with air conditioning.

"It is particularly important to us to combine modern living with efficient energy supply, thereby reducing the burden not only on the environment but also on the residents' wallets. The combination of geothermal energy, heat pumps and photovoltaics ensures an almost CO₂-free supply and guarantees stable energy costs in the long term – in addition, we are thus ensuring the sustainable value development of the property," explains Gabriel Harman, Head of Swietelsky Developments.

Thanks to its central location between Rosenhügel and Liesingbach, its proximity to schools and nurseries, and its excellent connections to the city centre, the project appeals to a broad demographic. The flats are being sold directly by Swietelsky Developments and through its partner IMMOcontract.