- Plumbing, heating, air-conditioning (5)
- Painting and paper hanging (4)
- Electrical work (3)
- Masonry and other stonework (3)
- Plastering, drywall, and insulation (1)
- Carpentry work (5)
- Roofing, siding, and sheetmetal work (6)
- Concrete work (2)
- Water well drilling (1)
- Excavation work (8)
- Special trade contractors, nec (4)
