Freiburg im Breisgau, located in Baden-Württemberg, Germany, is home to approximately 235,000 residents and is renowned both nationally and internationally as an eco-city. As a traditional stronghold of the Green Party, Freiburg has established itself as a leader in sustainable urban development. The city also boasts a rich history of environmental and social activism, exemplified by the Mietshäuser Syndikat—a network now comprising over 150 decommodified housing projects that extend well beyond the municipality’s borders. While many of Freiburg’s policies align with Green Growth principles, the city also promotes initiatives with significant transformative potential, such as the ongoing district development project “Kleineschholz,” which actively involves collaborative housing groups. These efforts, together with longstanding tensions and evolving relationships between community-led organizations and municipal authorities, make Freiburg a compelling case study for research in post-growth urban development.