- Plumbing, heating, air-conditioning (5)
- Painting and paper hanging (4)
- Electrical work (3)
- Masonry and other stonework (1)
- Terrazzo, tile, marble and mosaic work (1)
- Carpentry work (2)
- Concrete work (1)
- Excavation work (2)
- Wrecking and demolition work (1)
- Special trade contractors, nec (8)
