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