- Plumbing, heating, air-conditioning (36)
- Painting and paper hanging (8)
- Electrical work (25)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (14)
- Terrazzo, tile, marble and mosaic work (7)
- Carpentry work (8)
- Floor laying and floor work, nec (8)
- Roofing, siding, and sheetmetal work (14)
- Concrete work (12)
- Water well drilling (3)
- Structural steel erection (2)
- Excavation work (7)
- Wrecking and demolition work (2)
- Installing building equipment (4)
- Special trade contractors, nec (36)
