37 Advisory services relating to the construction, construction fit out, maintenance and repair of buildings; Advisory services relating to the installation, maintenance and repair of mechanical and electrical equipment; Advisory services relating to the installation, maintenance and repair of elevators; Advisory services relating to the installation, maintenance and repair of environmental control systems; Advisory services relating to the installation, maintenance and repair of heating and cooling systems; Advisory services relating to the installation, maintenance and repair of air conditioning systems; Advisory services relating to the installation, maintenance and repair of plumbing systems; Advisory services relating to the installation, maintenance and repair of lighting systems; Advisory services relating to the installation, maintenance and repair of building access systems and security systems; Advisory services relating to the installation, maintenance and repair of fire detection and alarm systems; Advisory services relating to the installation, maintenance and repair of apparatus for sanitation and cleaning; Building construction consultancy; Building construction, fitting-out being construction of building interiors, maintenance and repair; Building cleaning services; Decorating of buildings, namely, decorative painting services; Installation, maintenance and repair of mechanical and electrical equipment; Installation, maintenance and repair of elevators; Installation, maintenance and repair of environmental control systems; Installation, maintenance and repair of heating and cooling systems; Installation, maintenance and repair of air conditioning systems; Installation, maintenance and repair of plumbing systems; Installation, maintenance and repair of lighting systems; Installation, maintenance and repair of building access systems and security systems; Installation, maintenance and repair of fire detection and alarm systems; Installation, maintenance and repair of apparatus for sanitation and cleaning; Rental of building apparatus and equipment