North American Industry Classification System (NAICS)

233220 Multifamily Housing Construction
233320 Commercial and Institutional Building Construction
235110 Plumbing, Heating, and Air Conditioning Contractors
235990 All Other Special Trade Contractors
237110 Water and Sewer Line and Related Structures Construction
238140 Masonry Contractors
238190 Other Foundation, Structure, and Building Exterior Contractors
238210 Electrical Contractors
238220 Plumbing, Heating, and Air Conditioning Contractors
238910 Site Preparation Contractors
238990 All Other Specialty Trade Contractors
332311 Prefabricated Metal Building and Component Manufacturing
541611 Administrative Management and General Management Consulting Services
561210 Facilities Support Services
562910 Remediation Services

Standard Industrial Classification (SIC)

0783 Ornamental Shrub and Tree Services
1623 Water, Sewer, and Utility Lines
1629 Heavy Construction, NEC
1711 Plumbing, Heating, Air Conditioning
1731 Electrical Work
1751 Carpentry Work
1791 Structural Steel Erection
1794 Excavation Work
1795 Wrecking and Demolition Work
1796 Installing Building Equipment
1799 Special Trade Contractors
3596 General Industrial Machinery, NEC