What drives roof and siding prices in Canada by material, area and pitch, plus permits, sales tax and the current status of rebates.
A roof replacement price in Canada is mostly the product of three things: how much roof surface there is (measured in roofing squares of 100 square feet), which material goes on it, and how hard the roof is to work on. Siding works the same way, with wall area, cladding type and access doing most of the work. Rules then add their own costs: a municipal permit in some cities, GST/HST or GST plus PST/QST on the contract, and occasionally a rebate if insulation is upgraded at the same time.
Start with the roof replacement cost overview, which links to everything in this section. Then compare roofing materials, see how roof pitch changes the price, check siding replacement costs and flat roof replacement, find out whether you need a roofing permit, how sales tax applies and what is left of rebates and tax credits in 2026.
All dollar figures on this site are illustrative ranges to show the arithmetic, not quotes or survey data. Prices differ widely between regions, seasons and contractors.
Costs, Price Factors and 2026 Rules
How flat and low-slope roofs on Canadian homes, plexes and additions are priced, membrane types compared, insulation and drains, and Montreal reflectance rules.
Costs, Price Factors and 2026 Rules
Which sales taxes apply to roofing and siding contracts in each province, how to check a contractor's GST/HST number, cash-deal risks and worked tax examples.
Costs, Price Factors and 2026 Rules
Why steeper roofs cost more in Canada, how to convert footprint to roof area with a pitch factor, steep-roof labour charges and the slope limits for shingles.
Costs, Price Factors and 2026 Rules
How Canadian roofers price a new roof by roofing square, what material, pitch, tear-off and access add, and how to build an illustrative range for your home.
Costs, Price Factors and 2026 Rules
What is left of home renovation rebates for roofs and siding in 2026, the Canada Greener Homes Grant and Loan closures, provincial insulation programs and tax credits.
Costs, Price Factors and 2026 Rules
Compare roofing materials used in Canada on installed price per square, lifespan logic, snow, hail and wildfire performance, weight and warranty terms.
Costs, Price Factors and 2026 Rules
Roofing and siding permit rules are set by each municipality. See how Toronto and Montreal treat re-roofing, when structural work triggers a permit and how to check yours.
Costs, Price Factors and 2026 Rules
What new siding costs in Canada per square foot by cladding type, what removal, sheathing, insulation and trim add, and how to measure wall area for a quote.
