- Plumbing, heating, air-conditioning (6)
- Painting and paper hanging (3)
- Electrical work (5)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (1)
- Carpentry work (4)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (4)
- Concrete work (2)
- Glass and glazing work (1)
- Excavation work (4)
- Wrecking and demolition work (1)
- Installing building equipment (1)
- Special trade contractors, nec (9)
