- Plumbing, heating, air-conditioning (25)
- Painting and paper hanging (9)
- Electrical work (13)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (2)
- Terrazzo, tile, marble and mosaic work (6)
- Carpentry work (5)
- Floor laying and floor work, nec (8)
- Roofing, siding, and sheetmetal work (7)
- Concrete work (4)
- Glass and glazing work (5)
- Excavation work (2)
- Wrecking and demolition work (1)
- Special trade contractors, nec (16)
