• 236220 - Commercial & Institutional Building Construction
• 236210 - Industrial Building Construction
• 236115 – New Single-Family Housing Construction
• 236118 – Residential Remodelers  
• 237130 – Power & Communication Line & Related Structures Construction
• 237310 – Highway, Street & Bridge Construction  
• 238120 – Structural Steel & Precast Concrete Contractors
• 238130 – Framing Contractors  
• 238160 – Roofing Contractors  
• 238210 – Electrical Contractors & Other Wiring Installation Contractors    
• 238220 – Plumbing, Heating, & Air-Conditioning Contractors    
• 238290 – Other Building Equipment Contractors  
• 238320 – Painting and Wall Covering Contractors   
• 238330 – Flooring Contractors   
• 238340 – Tile & Terrazzo Contractors  
• 238350 – Finish Carpentry Contractors  
• 238910 – Site Preparation Contractors  
• 562910 – Remediation Services
• 221112 – Electric Power Generation, Fossil Fuel
• 221121 – Electric Power Transmission Systems
• 221122 – Electric Power Distribution
• 238390 – Other Building Finishing Contractors
• 541690 – Other Scientific & Technical Consulting Services
• 541611 – Administrative Management and General Management Consulting Services