- Plumbing, heating, air-conditioning (9)
- Painting and paper hanging (7)
- Electrical work (3)
- Plastering, drywall, and insulation (4)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (2)
- Floor laying and floor work, nec (1)
- Roofing, siding, and sheetmetal work (1)
- Concrete work (1)
- Glass and glazing work (1)
- Wrecking and demolition work (1)
- Special trade contractors, nec (10)
