Lumber prices in Canada: Quebec retailers compared, store by store

No store is cheapest everywhere. Across the 12 products in these tables, the lowest price sits at 8 different stores (BMR, Canac, Gagnon La Grande Quincaillerie, Home Depot Canada, Matériaux Laferté, Matério, Patrick Morin and RONA), so the cheapest store depends on what is on your list. A check mark flags the lowest price in each column.

Treated lumber is the deck and outdoor list: the frame, the posts and the surface boards.

The panels that go over the frame. OSB is usually the cheaper panel and plywood tends to cope better with moisture.

From August 28, 2026 to October 1, 2026, we ran 43,970 price checks on 126 lumber products at 9 Quebec retailers. The lowest price available on spruce-pine-fir rose 0.8 percent over the period, and the lowest price on pressure-treated lumber fell 0.6 percent. Across everything we followed, the lowest price rose 0.2 percent.

That measure follows the best price on offer each week, which is what you pay by shopping around, and not an average of the market. For the same piece of wood, the median gap between the cheapest and the priciest store was 6.0 percent.

The shelf prices on this page are what Quebec retailers charge. If you build somewhere else, the best official yardstick we have is Statistics Canada's building construction price index, which follows what builders pay for wood, plastics and composites in a single-detached house in each province.

Quebec, where our shelf prices come from, reads 118.8, up 5.0% on a year earlier. That is the highest of the 9 provinces Statistics Canada tracks, and Ontario is lowest at 97.4 in the second quarter of 2026. These are cost indexes set to 100 in a base period: they say how fast lumber and panel costs have moved in each province, not what a single item sells for at your local store. We will publish real shelf prices for your province as it goes live.

Each size has its own guide, with the grade notes, the worked examples and the questions people ask most.