- Plumbing, heating, air-conditioning (7)
- Painting and paper hanging (7)
- Electrical work (6)
- Masonry and other stonework (4)
- Plastering, drywall, and insulation (2)
- Terrazzo, tile, marble and mosaic work (2)
- Carpentry work (5)
- Roofing, siding, and sheetmetal work (1)
- Excavation work (3)
- Wrecking and demolition work (1)
- Special trade contractors, nec (4)
