De Key is a civil-society organization dedicated to good and affordable housing in neighborhoods with a pleasant living environment in Amsterdam, Diemen and Zandvoort. Quality and an integrated regional approach are central to their approach. They work to strengthen the public housing task and put the tenant in the first place. De Key manages over 37,000 homes, business premises and office properties and develops new rental and sale housing. The Key is involved in the Geuzenveld project.