Rental of affordable housing primarily to its members, in particular families, people with disabilities and the elderly; acquisition of building land and building rights; construction and acquisition of residential buildings that meet modern cooperative housing needs; careful and ongoing maintenance of its properties and their adaptation to the state of technical and social progress; construction of replacement buildings when existing buildings can no longer be renovated in an economically justifiable manner; use of funding instruments under the federal housing promotion law or corresponding cantonal and communal laws; ideal and material support for efforts aimed at affordable, healthy and good housing; participations.