- Plumbing, heating, air-conditioning (36)
- Painting and paper hanging (14)
- Electrical work (25)
- Masonry and other stonework (9)
- Plastering, drywall, and insulation (7)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (12)
- Floor laying and floor work, nec (5)
- Roofing, siding, and sheetmetal work (19)
- Concrete work (10)
- Water well drilling (3)
- Structural steel erection (1)
- Glass and glazing work (2)
- Excavation work (14)
- Wrecking and demolition work (3)
- Special trade contractors, nec (30)
