- Plumbing, heating, air-conditioning (29)
- Painting and paper hanging (10)
- Electrical work (22)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (8)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (19)
- Floor laying and floor work, nec (3)
- Roofing, siding, and sheetmetal work (5)
- Concrete work (8)
- Water well drilling (2)
- Structural steel erection (3)
- Excavation work (1)
- Installing building equipment (6)
- Special trade contractors, nec (38)