- Plumbing, heating, air-conditioning (21)
- Painting and paper hanging (6)
- Electrical work (15)
- Masonry and other stonework (4)
- Plastering, drywall, and insulation (6)
- Terrazzo, tile, marble and mosaic work (9)
- Carpentry work (4)
- Floor laying and floor work, nec (3)
- Roofing, siding, and sheetmetal work (8)
- Concrete work (12)
- Water well drilling (6)
- Glass and glazing work (2)
- Excavation work (12)
- Special trade contractors, nec (24)
