Roofing in Montréal
Montréal roof rules are set by the borough
In Montréal the roof rules, the permit and the street permit for a container all come from the borough where the building stands, so the same job can need a permit in one borough and none in the next. These are the points a roofing crew meets, from montreal.ca and the Office de la protection du consommateur.
A permit, in most cases, and your borough decides
The City says that replacing a roof covering means following the rules in force and, in most cases, getting a permit, and that the standards vary with the type of roof, the building and the borough. A roof under 2:12 (16.7 %) is treated as flat or low-slope. The spread is wide: Anjou needs no permit to repair or replace a flat or sloped roof, Outremont needs one even to repair a covering and asks for the original materials on sloped roofs, and Ville-Marie lets you fix a crack or hole without a permit as long as you redo no more than half the surface.
Source: Ville de Montréal: Toitures · Ville de Montréal: Rénover un toit plat ou à faible pente · Ville de Montréal: Rénover un toit en pente
White, grey or green flat roofs
When a flat roof is redone or built, several boroughs require white, grey or green roofing to cut urban heat islands. The minimum solar reflectance index (SRI) is set borough by borough: 78 in Ville-Marie and Verdun, 56 in Côte-des-Neiges–Notre-Dame-de-Grâce and Mercier–Hochelaga-Maisonneuve, and 82 in Saint-Léonard for buildings other than single-family homes. Le Sud-Ouest also asks for an SRI of at least 25 on sloped roofs. Most boroughs exclude the part of a roof under mechanical equipment or a terrace; keep the product data sheet with its SRI for the permit counter.
Source: Ville de Montréal: Toitures · Ville de Montréal: Rénover un toit plat ou à faible pente
A container on the street
A container on the public road, or scaffolding over the sidewalk, needs a permit in Montréal: a temporary occupancy permit for the public domain, applied for in the borough. Verdun adds that a debris container may go in the street or the lane but not on the sidewalk. Fees and signage are set by each borough.
Source: Ville de Montréal: Permis d’occupation temporaire du domaine public · Ville de Montréal: Permis pour conteneur à débris
Island towns that are not Montréal
Fourteen towns on the island, among them Westmount, Mont-Royal, Dorval, Pointe-Claire, Côte-Saint-Luc and Beaconsfield, are reconstituted cities: their mayors sit on the agglomeration council beside Montréal’s, and the borough roof pages on montreal.ca do not cover them. Check with the town before you quote a permit there.
Source: Ville de Montréal: Conseil d’agglomération
A roof sold at the kitchen table
The Office de la protection du consommateur names roofing among the renovation trades where a sale signed at the customer’s home is itinerant commerce, even when the customer asked you to come. The contract is written in French, with the French version handed over first; for 10 days you may not start the work or accept a payment, unless the contract covers only an urgent roof repair the customer asked for at home.
Source: OPC: Le commerce itinérant, c’est quoi? · OPC: Contrat de commerce itinérant · OPC: Perception d’un acompte
General information for contractors, checked October 13, 2026; it is not legal advice. Confirm with the City before you rely on it. Roof Manager does not obtain permits or licences for you. Province-wide rules: roofing in Quebec.
