Building permits in Montréal

Montréal says that, with rare exceptions, a permit is required before building, extending, altering or replacing a terrace, balcony, veranda or stoop. Exact thresholds and exemptions vary by borough.

Montréal publishes borough-specific shed/outbuilding rules: some boroughs use 15 m² thresholds while others use different exemptions or conditions.

Montréal interior-renovation permits are administered through borough rules. Basement work that affects structure, foundations, dwelling count or other regulated elements can require a permit; confirm the borough-specific path.

Montréal notes that changing the number of dwellings is regulated and may require municipal-number and permit steps, with borough rules controlling the exact path.

Montréal states that you must get a permit before beginning a building-expansion project; borough zoning and design standards determine the detailed approval.

Montréal exempts listed aesthetic work such as flooring, painting, cabinets, counters and same-location sink/tub replacement, but says a permit is required when work affects foundations, changes structure or increases floor area.

Montréal states that a permit is required when interior work affects foundations or changes the structure of the dwelling; engineer-sealed structural plans may be required.

Montréal requires a permit/certificate of authorization to install a swimming pool; applications are handled by the borough and borough-specific standards and fees apply.

Montréal treats garages and other outbuildings through borough-specific accessory-building rules.

Montréal renovation applications can include plumbing, ventilation and other regulated work, but the applicable authorization depends on borough and scope.

Montréal states that fence permits are necessary in some boroughs and not in others, with heritage and pool-enclosure rules creating additional triggers. The correct citywide answer is therefore borough-specific.

Montréal exterior-renovation requirements are administered through borough permit counters.

Confirm the exact permit requirement for this project with Montréal.