- Plumbing, heating, air-conditioning (9)
- Painting and paper hanging (1)
- Electrical work (6)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (1)
- Carpentry work (1)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (2)
- Concrete work (2)
- Excavation work (2)
- Special trade contractors, nec (2)
