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