With the 1st Vienna WohnBAUM program, the city of Vienna aims to combine subsidized housing with sustainable construction. Now, with the project „Hertha am Wasser“ in Donaustadt, another component has been launched.

The non-profit developer MIGRA broke ground on October 5, 2026, at Steinspornweg 33. In total, around 70 subsidized apartments will be built as part of the project on three Vienna properties.

In addition to Steinspornweg 33, the MIGRA package also includes a project at Leopoldauer Straße 132A in the 21st district and another in Donaustadtstraße in the 22nd district.

Together, around 5,700 square meters of usable living space will be created. Planned are 36 subsidized apartments and 34 SMART-subsidized apartments.

The completion of the three projects is currently scheduled for the second quarter of 2028.

The project at Steinspornweg is named „Hertha am Wasser“ and includes 15 subsidized apartments. Eight of these will be offered under the SMART housing program at particularly favorable conditions.

Five individual houses are planned, arranged around village squares. In addition, there will be four smaller community houses.

The apartments range from one to four-room units. Balconies, loggias, terraces, or private gardens are intended to create additional private open space.

The project relies on a standardized timber construction system. Hohensinn Architektur developed a modular system for this purpose, which can also be used at other locations.

The buildings consist of prefabricated timber frame components and room modules. Even wet cells, including installations, are prefabricated.

In terms of materials, elements of the circular economy are also to be used. Mentioned are, among others, ReUse parquet and reclaimed wood. The excavation is also to be used as directly as possible on its own construction site.

A so-called digital twin is to provide information about the materials and components used, as well as about repair, dismantling, and recycling.

The project is also intended to break new ground in energy supply.

According to the project description, heat pumps with deep probes will be used together with underfloor heating and component activation for heating and summer cooling.

Hot water is to be provided by decentralized heat pumps. The green roofs will also be used for photovoltaic systems, which are intended to generate renewable electricity.

In addition to the apartments, „Hertha am Wasser“ is designed to have plenty of space for communal use.

Planned are community gardens, urban gardening, workshops, a garden kitchen, as well as central recreation and meeting zones.

Two small commercial spaces are also intended to enable the combination of living and working.

In the immediate vicinity are also Mühlwasser and Lobau, which are part of the Donau-Auen National Park.

The 1st Vienna WohnBAUM Program was launched by the City of Vienna in 2021. The goal is to combine affordable housing with architectural quality and ecological requirements.

A total of around 1,200 apartments are to be built in three phases using wood or wood-hybrid construction methods.

In addition to the building material wood, the focus is also on climate resilience, circular economy, digital planning, and alternative energy solutions.

For the current MIGRA package, the non-profit developer had already prevailed in a developer competition in 2022.

Housing Councillor Elke Hanel-Torsch described the project as an example of how subsidized housing, sustainability, and new technologies can be combined.

(Red)

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