The Kalkbreite complex is an innovative housing and commercial development in Zurich, Switzerland, completed in 2014. Located at the junction of Badenerstrasse and Kalkbreitenstrasse, it stands as a prime example of sustainable urban living and cooperative housing.

The project, initiated by the Kalkbreite Cooperative, features 88 apartments accommodating up to 250 residents, along with various commercial spaces providing 200 jobs. The complex is built atop a tram depot, creatively utilizing urban space. It offers a mix of housing options, including family apartments, shared flats, and cluster apartments, catering to diverse living preferences.

Kalkbreite emphasizes sustainability and community living. It's certified as a "2000 Watt site in operation," with residents actively reducing their ecological footprint through shared resources and car-free living. The complex includes communal areas, a public courtyard, and spaces for cultural and commercial activities, fostering a vibrant community atmosphere.

The development process was notably participative, involving future residents in planning and decision-making from the outset. This approach has resulted in a unique living environment that balances private and shared spaces, promoting social interaction and sustainable urban living.

Kalkbreite represents a successful model of cooperative housing that addresses contemporary urban challenges, offering affordable living spaces in a high-demand area while prioritizing community engagement and environmental responsibility.