In Quebec, you don’t build, renovate or add on without first working through the maze of building permits and municipal regulations. And with the Construction Code updates that took effect in 2026, it pays to understand how the system works before you start your project.
Why do these regulations exist?
Building and planning regulations protect three things: public safety, the value of properties in the neighbourhood and the coherence of urban development. Without these rules, we’d have unsafe buildings, conflicts between neighbours and chaotic development. Understanding them means making sure your project not only gets its permit, but also holds up over time.
The RBQ and municipalities: who does what?
The Régie du bâtiment du Québec (RBQ) oversees the application of the Quebec Construction Code across the province. Municipalities are responsible for issuing permits and enforcing their own zoning and planning by-laws.
In practice, a project must comply with both the provincial code (safety, structure, insulation, plumbing, electrical) and municipal by-laws (zoning, setbacks, height, appearance).
The 2026 regulatory updates
Two major changes took effect on March 26, 2026: updates to the Gas chapter and the Electricity chapter of the Quebec Construction Code. These updates incorporate more recent versions of the reference standards and affect both residential and commercial installations.
For contractors and owners, this means making sure specialized subcontractors are up to date on the new requirements. A transition period applies: in September 2026 it was extended, so the previous building and electrical rules can still apply to work started before October 17, 2027. Your contractor should know which version applies to your project.
The most common types of building permits
New construction permit
Required for any new building. It calls for plans signed by a professional (architect or technologist), a site plan by a land surveyor, and compliance with zoning.
Addition permit
Required for virtually any addition that changes the building’s footprint or volume. The permit checks zoning compliance: setbacks, maximum height and lot coverage.
Renovation permit
For work affecting the structure, the envelope or building systems (plumbing, electrical, ventilation). Many owners think interior renovations don’t need one — that’s often wrong.
Certificate of authorization
For minor work: new siding, a fence, cutting down a tree, a pool. It varies from one municipality to another.
How much do building permits cost?
Each municipality sets its own fee schedule. In many cities, the cost of a building permit is calculated on the estimated value of the work, with a minimum amount; others charge a flat fee per type of permit. Cities may also require contributions for parks or services. Check your municipality’s fee schedule before you finalize your budget.
Timelines to expect
Issuing times vary widely from one municipality to another. In large cities, expect 4 to 12 weeks for a standard residential project, and longer for commercial projects or complex additions. Once issued, a permit is valid for a limited time: work must start, then be completed, within the deadlines set by the municipal by-law. Check those deadlines as soon as you receive the permit. Build these delays into your schedule, since building permits often set the pace of the whole project.
Documents to prepare
- Detailed plans signed by a recognized professional
- Site plan by a land surveyor
- Up-to-date certificate of location
- Full description of the work and materials
- Thermal resistance calculation for the building envelope
- Detailed cost estimate
- Proof of ownership and title deeds
Pitfalls to avoid
Working without a permit means risking fines, a stop-work order or even an order to demolish. Worse, when you sell, missing permits can void a transaction or lead to a lawsuit for latent defects.
Another trap: not checking zoning before buying a lot. Many buyers discover afterwards that their project (a multi-unit building, a detached garage, an in-ground pool) isn’t allowed on their land.
Our approach at MSC Construction
We handle the permit process with our clients. We first confirm regulatory feasibility, prepare the documents, file the application and follow up with the municipality. When you’re used to this process, you know the questions inspectors will ask and prepare files accordingly — which significantly shortens timelines. It’s a service that saves time and prevents costly mistakes.
Planning a project?
MSC Construction handles new homes, extensions and major renovations and commercial projects across Quebec. Tell us about your project: request your free quote.