Gröninger Hof is an innovative housing project in Hamburg, Germany, that aims to transform a seven-story parking garage into a vibrant, sustainable living space. The project is led by a cooperative formed in 2018, emerging from the "Altstadt für Alle!" (Old Town for All) initiative, which seeks to revitalize Hamburg's inner city.

The cooperative plans to create approximately 75 apartments around a green inner courtyard, with the lower floors dedicated to cultural, educational, small business, gastronomy, and co-working spaces. This mixed-use approach aims to enhance the quality of life in the neighborhood. The project emphasizes social diversity, offering various apartment sizes and including subsidized housing options.

A key feature of Gröninger Hof is its commitment to sustainability. By repurposing parts of the existing parking structure, the project significantly reduces construction-related greenhouse gas emissions compared to a complete new build. The design incorporates natural lighting, solar panels, and connection to the city's district heating system.

The cooperative, which has about 300 members, is open to all and relies on community shares and supporter loans for financing. The project has garnered support from the city of Hamburg, receiving funding from various municipal sources. Construction is planned to begin in spring 2025, with completion expected in 2027. Gröninger Hof stands as a model for creative urban development, combining affordability, sustainability, and community engagement in a tight housing market.