- Plumbing, heating, air-conditioning (34)
- Painting and paper hanging (9)
- Electrical work (10)
- Masonry and other stonework (5)
- Plastering, drywall, and insulation (3)
- Carpentry work (6)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (12)
- Concrete work (6)
- Water well drilling (1)
- Excavation work (15)
- Installing building equipment (1)
- Special trade contractors, nec (13)
