How much for pressure-treated lumber per square foot in Vancouver $?

Pressure-treated lumber decking costs $30-$55 per square foot installed in Metro Vancouver, making it the most budget-friendly deck option available.

For materials only, you're looking at $8-$15 per square foot for pressure-treated deck boards, depending on grade and board width. Standard 5/4" x 6" PT decking boards run $8-$12 per square foot, while premium grades and wider boards (2" x 6") push toward the higher end. Labour adds another $15-$25 per square foot for professional installation, bringing the total installed cost to that $30-$55 range.

A typical 300 square foot pressure-treated deck runs $9,000-$16,500 fully installed in the Vancouver market. This includes concrete footings, pressure-treated framing (posts, beams, joists), PT decking boards, basic wood railing, stairs if needed, and all labour. The lower end reflects standard-grade lumber with basic railing, while the higher end includes premium PT lumber, upgraded railing systems, or more complex designs.

Metro Vancouver's wet climate affects PT lumber performance significantly. Pressure-treated lumber is chemically treated with ACQ (alkaline copper quaternary) to resist rot and insects, making it well-suited to our 1,200mm+ annual rainfall. However, PT lumber will check, warp, and twist as it dries — especially during the first year after installation. This is normal but affects appearance. Most contractors recommend waiting 3-6 months after installation before applying stain or sealer to allow the wood to fully dry and stabilize.

The key advantage of PT lumber is cost and structural reliability. It's the standard material for all deck substructure (posts, beams, joists) even when you choose cedar or composite for the surface decking. PT lumber is dimensionally stable, strong, and widely available. The trade-offs include a less refined appearance compared to cedar, the tendency to warp and check, and the need for staining or painting to improve weather protection and aesthetics.

Critical fastener requirement: PT lumber treated with ACQ is corrosive to standard galvanized fasteners. You must use stainless steel or hot-dipped galvanized screws and hardware — never standard zinc-plated fasteners, which will corrode rapidly and fail. This is especially important in Vancouver's persistent moisture.

For a ground-level floating deck under 600mm height, PT lumber is an excellent DIY option. For elevated decks requiring permits and structural engineering, hire a professional even with budget-friendly PT materials.

Need help finding a deck builder? Vancouver Deck Contractors can match you with experienced professionals for free estimates on your pressure-treated deck project.