- Plumbing, heating, air-conditioning (63)
- Painting and paper hanging (36)
- Electrical work (35)
- Masonry and other stonework (26)
- Plastering, drywall, and insulation (17)
- Terrazzo, tile, marble and mosaic work (7)
- Carpentry work (46)
- Floor laying and floor work, nec (14)
- Roofing, siding, and sheetmetal work (36)
- Concrete work (25)
- Water well drilling (6)
- Glass and glazing work (3)
- Excavation work (34)
- Installing building equipment (1)
- Special trade contractors, nec (59)
