Get featured for homeowners searching "Metal Roofing" in Montreal — $40/month, cancel anytime.
Whether you need authorization depends on the scope of your work. Simple upkeep such as patching or adding sealant does not require approval. However, if you're installing or replacing the roof covering itself on a flat or low-sloped surface, you must obtain a permit from your borough before proceeding.
Montreal regulations specify several acceptable options for flat roof coverings. You may use light-colored surfaces—either naturally white materials or those painted white—along with heat reflector systems, or white gravel meeting a minimum solar reflectance index requirement. Green roofs are also permitted, though they require a permit application submitted directly at your borough's permit counter. Material specifications and reflectance thresholds may differ depending on which borough you live in.
Permit fees are calculated based on your project's estimated expenses. The calculation is $9.80 per $1,000 of projected work costs. However, you'll pay a minimum fee that depends on your building type: $167.40 for residential properties or $491.70 for commercial, industrial, institutional, or mixed-use buildings. These fees are non-refundable, and additional charges may apply if your property has heritage designation or special architectural requirements.