Construction of buildings; Construction planning; Construction services, namely, planning, laying out and custom construction of residential and commercial communities; Construction supervision; Construction, maintenance and renovation of property; Excavation services; Foundation contractor services; Framing contractor services; HVAC contractor services; Maintenance and repair of buildings; Air conditioning contractor services; Building construction services; Heating contractor services; Installation and repair of air conditioning apparatus; Boiler cleaning and repair; Building construction and repair; Building construction supervision; Building maintenance and repair; Construction and renovation of buildings; Construction and repair of buildings; Construction management; Construction of roads, underground utilities, and housing pads; Consulting in the field of building construction; Consulting services for the construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities; Custom construction and building renovation; Pipeline construction and maintenance; Residential and commercial building construction; Burner maintenance or repair; Installation and maintenance of solar energy based power plants; Installation, repair and maintenance of cleanroom facilities and equipment; Installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes; Installation, repair and maintenance of heating equipment; Maintenance and repair of burners; Maintenance and repair of heating installations; Maintenance and repair of medical diagnostic equipment; Maintenance and servicing of medical imaging apparatus used in medical imaging centers; Maintenance, repair, replacement and tuning of components, parts or systems in steam and gas turbine generators; Oil burner regulation and repair; Pump repair and maintenance; Pump repair or maintenance; Repair or maintenance of chemical plants; Repair or maintenance of conveyors; Repair or maintenance of air-conditioning apparatus; Repair or maintenance of boilers; Repair or maintenance of gas water heaters; Repair or maintenance of industrial furnaces; repair or maintenance of storage tanks; Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; Plumbing and gas and water installation; Pipeline installation and repair; Heating equipment installation and repair; Mechanical contractor services; Plumbing; Plumbing contractor services; Plumbing services; Pump repair; Pump repairing; Refrigerator repair