- Plumbing, heating, air-conditioning (12)
- Painting and paper hanging (10)
- Electrical work (8)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (4)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (3)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (3)
- Concrete work (5)
- Water well drilling (1)
- Excavation work (2)
- Installing building equipment (1)
- Special trade contractors, nec (17)
