- Plumbing, heating, air-conditioning (10)
- Painting and paper hanging (4)
- Electrical work (8)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (2)
- Carpentry work (4)
- Floor laying and floor work, nec (2)
- Concrete work (4)
- Water well drilling (1)
- Glass and glazing work (1)
- Excavation work (3)
- Wrecking and demolition work (1)
- Special trade contractors, nec (4)
