- Plumbing, heating, air-conditioning (11)
- Painting and paper hanging (4)
- Electrical work (3)
- Masonry and other stonework (1)
- Carpentry work (3)
- Floor laying and floor work, nec (2)
- Roofing, siding, and sheetmetal work (5)
- Excavation work (4)
- Special trade contractors, nec (6)
