- Plumbing, heating, air-conditioning (24)
- Painting and paper hanging (9)
- Electrical work (22)
- Masonry and other stonework (2)
- Plastering, drywall, and insulation (1)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (4)
- Roofing, siding, and sheetmetal work (4)
- Concrete work (6)
- Water well drilling (3)
- Glass and glazing work (2)
- Excavation work (1)
- Installing building equipment (1)
- Special trade contractors, nec (18)
