Building construction; repair; installation services; exterior and interior cleaning of buildings, windows, vehicles, textiles; maintenance, repair and servicing of real estate; installation, maintenance and repair of conveying, refrigerating and/or heating facilities; maintainance services, in particular servicing; maintenance of technical building installations; caretaker services, namely carrying out minor repairs; servicing of outdoor installations, in particular facade maintenance; construction information; management and supervision of construction works; conducting building projects; demolition of buildings; cleaning of buildings, interior and interior; rental of construction machinery; domestic and building maintenance, repair and cleaning (caretaker services); assembly services relating to the installation of, and maintenance and repair of computer hardware, office equipment and electrical equipment; mining extraction; road paving.