- Plumbing, heating, air-conditioning (9)
- Painting and paper hanging (3)
- Electrical work (9)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (9)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (4)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (2)
- Concrete work (4)
- Water well drilling (5)
- Excavation work (10)
- Special trade contractors, nec (13)
