The cooperative aims to provide its members with affordable housing for rent through joint self-help and to permanently remove these properties from speculation. To this end, it can acquire, encumber, build on and sell plots of land. The cooperative maintains its buildings in good structural condition and renovates them periodically. The living space and the number of users should be in a reasonable proportion to each other. The cooperative can participate in companies with the same or similar objectives and acquire membership in umbrella organizations of non-profit building cooperatives.