- Plumbing, heating, air-conditioning (24)
- Painting and paper hanging (3)
- Electrical work (12)
- Masonry and other stonework (1)
- Plastering, drywall, and insulation (1)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (7)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (3)
- Concrete work (5)
- Water well drilling (4)
- Structural steel erection (1)
- Glass and glazing work (1)
- Excavation work (1)
- Special trade contractors, nec (27)
