- Plumbing, heating, air-conditioning (22)
- Painting and paper hanging (3)
- Electrical work (15)
- Masonry and other stonework (5)
- Plastering, drywall, and insulation (3)
- Carpentry work (6)
- Floor laying and floor work, nec (8)
- Roofing, siding, and sheetmetal work (8)
- Concrete work (7)
- Water well drilling (1)
- Excavation work (9)
- Installing building equipment (7)
- Special trade contractors, nec (22)