Roof cost in Laval: the estimator
Pick the roofing, enter the area of the house and the slope of the roof. The estimator calculates the roof area and a price range, based on the prices per square foot posted by Quebec companies.
Roof area, times the price per square foot
A sloped roof is larger than the house it covers. The estimator multiplies the footprint by a slope factor: 1.05 for a 4:12 slope, 1.20 for 8:12 and 1.41 for 12:12. A flat roof keeps the footprint.
The roof area is then multiplied by the price range per square foot of the chosen roofing. The ranges are those in the table on our price page, surveyed on October 3, 2026 on the websites of Quebec roofing companies and a quote comparison site. The result is rounded to the nearest hundred dollars.
These are posted prices, not prices surveyed in Laval. The survey does not say whether taxes are included. Dormers, chimneys, difficult access, layers to remove and rotten decking make the price vary from one roof to another. The firm price comes after a visit.
For a new material, the City of Laval requires a permit. The permit calculator gives the fee.
Sources, consulted on October 3, 2026:
- Les Couvreurs Duro-Toit, « Prix d'une toiture »
- Les Couvreurs Duro-Toit, « Combien coûte un toit plat »
- Toiture Union, « Prix d'une toiture au Québec »
- Toiture Union, « Membrane de toit plat »
- Toiture Expert, « Toit plat »
- RénoAssistance, « Prix d'une toiture »
- APCHQ, « Spécial paie », hourly labour cost in the residential sector, January 2026 (accessed October 6, 2026)
- Commission de la construction du Québec, « Salaires et taux » (accessed October 6, 2026)
- Ville de Laval, « Rénovation ou réparation résidentielle extérieure », permit fees (accessed October 8, 2026)
Link to this estimator
Broker, inspector, condominium manager or neighbourhood association: you can link to this estimator from your website. It is free. We update it with each new price survey.
<a href="https://toiture-laval.com/outils/prix-toiture-laval/en/">Roof cost estimator for Laval</a>