The Alte Schule Karlshorst was purchased by the trias Foundation with the help of an endowment from SelbstBau e.G. and is leased to the cooperative for 99 years by means of a hereditary lease. The building is owned by the tenants' cooperative SelbsBau e.G. Living together and supporting each other is a basic principle for the housing project in the listed former community school Karlshorst. New life has come here since 2007: young families, single people, disabled people, older people who are young at heart, in short, anyone who can imagine living in a school that is over 100 years old.
Due to its structural substance, the Alte Schule Karlshorst offers good conditions for the implementation of a cross-generational living concept. The bright, large rooms of the former classrooms were individually converted into flats of various sizes according to the needs of the residents, without losing the former generous impression and character of the community school. Six of the 21 flats are handicapped accessible, the entire property and the building are barrier-free. The allocation of the flats is tied to a housing entitlement certificate. The Mark Brandenburg Association has rented rooms and runs a children's house. Ten children who cannot live with their parents for various reasons live there.