The purchase and sale of any real estate; the rental, management and maintenance of buildings; the promotion of housing, garages or storage facilities, individual or collective, including the development of the project, its monitoring, its implementation as well as all kinds of insurance brokerage. The operation and management of a company specialized in the supply, installation, maintenance, maintenance and repair of heating, ventilation, sanitary, cooling, sheet metal, roofing and waterproofing installations, including all interventions, work or services related to these activities (cf. statutes for complete purpose).