Building a deck is a uniquely Canadian renovation — the short but intense outdoor season makes usable backyard space a genuine quality-of-life upgrade. Material choice is the most consequential decision: pressure-treated wood costs $6,000–$15,000 for a 300 sq ft deck but requires annual maintenance, while composite decking (Trex, TimberTech, Fiberon) costs 2–3x more upfront yet is virtually maintenance-free and often preferred in Canada's wet coastal and humid central climates. Regional pricing varies 15–20%, with Vancouver and Toronto at the high end due to labour availability and permit complexity.
This calculator estimates your deck project based on square footage, decking material, railing type, stair configuration, and additional features like built-in benches, a pergola, or hot tub framing. Select your city and quality tier, then configure the deck dimensions and features — your per-square-foot cost and total estimate update with each change. The breakdown separates framing and structural costs from decking material and finishing work so you understand where the money goes.
The single biggest cost variable after material choice is railing type. Glass panel railings can add $200–$400 per linear foot compared to $60–$100 for aluminum balusters — on a 60-foot perimeter, that difference alone is $8,400–$18,000. Decide on your railing before finalizing your budget.