- Plumbing, heating, air-conditioning (23)
- Painting and paper hanging (13)
- Electrical work (17)
- Plastering, drywall, and insulation (13)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (11)
- Floor laying and floor work, nec (4)
- Roofing, siding, and sheetmetal work (13)
- Concrete work (8)
- Water well drilling (3)
- Glass and glazing work (1)
- Excavation work (13)
- Wrecking and demolition work (1)
- Installing building equipment (1)
- Special trade contractors, nec (23)
