How long does a permit take and how much does it cost in Gatineau?

Processing time: No set processing time: applications are reviewed as soon as possible, depending on volume, once complete and paid. Cost: Set by the By-law on the administration of urban planning by-laws 501-2005 (s. 103.1 to 110); shown when you apply online.

‹ Gatineau rules

Gatineau

What are the rules for a home extension in Gatineau?

Q: What are the rules for a home extension in Gatineau?

A building permit is required to extend a house. A garage or carport attached to a detached single-family house may come within 3 m of a side line along a street, even if the zone's setback is larger; the living space must meet the grid's setbacks. A sunroom may project at most 2 m into any setback and must stay 1.5 m from the lot lines.

A building permit is required to extend a house.

Permit required

A zone, a heritage area or a shoreline can have its own standards: with your address, the Radar reads your zone's grid and tells you what applies to your property.

The rules, in short

A garage or carport attached to a detached single-family house may come within 3 m of a side line along a street, even if the zone's setback is larger; the living space must meet the grid's setbacks. (art. 186, para. 2 a))
A sunroom may project at most 2 m into any setback and must stay 1.5 m from the lot lines. (art. 183, table, row 15)

Summary by Radar Foncier, in our own words: the official French text of the by-law, linked above, prevails.

Applying in Gatineau

Processing time: No set processing time: applications are reviewed as soon as possible, depending on volume, once complete and paid
Cost: Set by the By-law on the administration of urban planning by-laws 501-2005 (s. 103.1 to 110); shown when you apply online
Urban planning department: 311
Permits on the municipality's website

For the permit application, you will often need a site plan (certificat d'implantation) drawn up by a land surveyor: certificate of location and site plan, what to know (in French).

Other projects in Gatineau

Home extension elsewhere: Dorval, Montreal, Sherbrooke, Vaudreuil-Dorion, Westmount.

Version française de cette page

Source: Zoning By-law 532-2020 (administrative compilation), French version, checked on October 22, 2026. Plain-English summary: the official French text prevails, and a by-law can change. Confirm with the Gatineau urban planning department before buying materials. Radar Foncier is an independent service, not affiliated with the municipality.

Radar Foncier in English. Permits and rules for Québec homeowners; the full site and the reports are in French. Version française