- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (1)
- Electrical work (5)
- Plastering, drywall, and insulation (2)
- Roofing, siding, and sheetmetal work (1)
- Concrete work (5)
- Water well drilling (1)
- Excavation work (6)
- Installing building equipment (1)
- Special trade contractors, nec (5)
