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PRIMARY NAICS CODES

236116 – New Multifamily Housing Construction (Except Operative Builders)
236210 – Industrial Building Construction
236220 – Commercial and Institutional Building Construction
237990 – Other Heavy and Civil Engineering Construction
238120 – Structural Steel and Precast Concrete Contractors
238130 – Framing Contractors
238140 – Masonry Contractors
238150 – Glass and Glazing Contractors
238160 – Roofing Contractors
238210 – Electrical Contractors
238220 – Plumbing, Heating, and Air-Conditioning Contractors
238290 – Other Building Equipment Contractors
238310 – Drywall and Installation Contractors
238320 – Painting and Wall Covering Contractors
238330 – Flooring Contractors
238350 – Finish Carpentry Contractors
238910 – Site Preparation Contractors
332311 – Prefabricated Metal Building & Component Manufacturing
541330 – Engineering Services
561210 – Facilities Support Services
562910 – Remediation Services