Genossenschaft Mietshäuser Syndikat is a volunteer-managed cooperative in Switzerland that acquires and preserves residential properties to ensure long-term affordable housing through cost-rent principles, removing them from property market speculation.1256
The organization operates as a non-profit housing developer, functioning as an umbrella cooperative for self-managed housing projects. It purchases buildings collectively, integrating existing residents as members who hold at least one share; members then rent units from the cooperative while sharing ownership.68 Key activities include property acquisition, maintenance guarantees, financing support via loans from networked cooperatives, and resident self-governance.1458 Properties follow cost-rent models, prioritizing needs over capital returns and fostering solidarity across housing cooperatives and tenants.58 Listed buildings include Klybeckstrasse 101, Rixheimerstrasse 7, and Nasenweg 20/22/24 in Basel and nearby areas like Aesch, with examples such as Elsässerstrasse 137 (an 1898 block with 8 apartments).37
Founded in late 2014 amid discussions among housing cooperatives, urban groups, and individuals to counter speculation, it marked its 10-year anniversary in August 2025.56 Primarily active in the Basel region, it manages over a dozen properties and supports new projects like "ostdeck."35 The board handles operations as a team, with no specific key individuals named publicly.9 This model directly advances affordable, sustainable housing by securing cost-based rents and collective ownership.18