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| 4520 | Underpinning, construction | |
| 4520 | Utilities, underground, construction | |
| 4520 | Vacation homes, construction | |
| 4520 | Veneer facing stone or brick, installation | |
| 4520 | Viaduct construction, general contractors | |
| 4520 | Vinyl siding, soffit and fascia, installation | |
| 4520 | Wall components (exterior and interior), prefabricated, installation | |
| 4520 | Walls, retaining, block, stone, or brick, contractors | |
| 4520 | Warehouses, public, construction | |
| 4520 | Washeries construction, mining, general contractors | |
| 4520 | Waste disposal plant construction, general contractors | |
| 4520 | Water filtration and treatment plants, construction | |
| 4520 | Water main line construction, general contractors | |
| 4520 | Water mains and hydrants, construction | |
| 4520 | Water mains, municipal, construction | |
| 4520 | Water pumping or lift stations, construction | |
| 4520 | Water storage tanks and towers, construction | |
| 4520 | Water well drilling (except water intake wells in oil and gas fields) | |
| 4520 | Water well pumps and well piping systems, installation | |
| 4520 | Water wells, digging, boring or sinking | |
| 4520 | Waterway construction, general contractors | |
| 4520 | Weeping tile installation | |
| 4520 | Welding contractors, operating at site of construction | |
| 4520 | Welding, rivetting or bolting purchased fabricated parts for steel erection | |
| 4520 | Wharves, construction | |
| 4520 | Wind energy equipment, construction | |
| 4520 | Wood flooring, rough installation | |
| 4520 | Wood frame components, installation | |
| 4520 | Wood siding, installation | |
| 4520 | Wood stairways, installation | |
| 4520 | Wooden roof shingles and shakes, installation | |
| 4520 | Workshops, construction | |
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