A building cooperative is a sustainable form of company registered in the cooperative register for the creation of good and safe living space. It builds, finances and manages apartments for its members. The main task is to promote the members by providing affordable housing (performance relationship). This means that the focus of economic activity is not on the return, but on the long-term satisfaction of the members.

The basic principles of a cooperative are self-help, self-administration and self-responsibility. The cooperative consists of its members and is a very democratic form of company. The primary purpose of the cooperative is to promote its members by ensuring good, safe and socially responsible housing. For this purpose, the housing stock is adjusted and managed according to the needs of the members.