- Plumbing, heating, air-conditioning (22)
- Painting and paper hanging (7)
- Electrical work (15)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (2)
- Carpentry work (8)
- Floor laying and floor work, nec (6)
- Roofing, siding, and sheetmetal work (15)
- Concrete work (11)
- Water well drilling (3)
- Glass and glazing work (2)
- Excavation work (18)
- Wrecking and demolition work (2)
- Special trade contractors, nec (19)
