Thinking of tearing down a shed, garage, wall, or even a whole house? In Montreal, one misstep in the demolition permit process can stall your entire project — or worse, get it shut down entirely. Here’s a no-nonsense guide to demolition permit Montreal requirements, common errors, and how to stay on the right side of the city’s rules.
We’ve compiled real-world questions from homeowners, clarified confusing city policies, and added insight from our own experience at DemoPrep.
Q: Do I Always Need a Demolition Permit?
A: Not always — but usually. If you’re removing any structure that’s attached to a building (like a garage, room, or extension), you almost always need a permit.
Even interior work may require one if you’re touching structural components, like load-bearing walls or anything affecting the building’s envelope or safety systems. For minor interior interior demolition in Montreal, permits aren’t always required, but you should still check with your borough office.
Examples That Require Permits:
- Complete or partial building demolitions
- Detached garages or sheds over 10 m²
- Load-bearing interior wall removal
- Demolition of firewalls or shared walls (e.g., duplexes)
Review the official Montreal page on how to obtain a demolition permit.
⚠️ Common Mistakes Homeowners Make
- Assuming small means no permit.
Even small structures may require approval depending on zoning or proximity to neighbors. - Starting demolition before approval.
This can result in a stop-work order or retroactive fines of up to $5,000. - Not hiring an engineer when required.
If you’re altering the structural integrity of your home, the city often requires certified plans. - Skipping the heritage check.
If your home or building is in a heritage zone, special approval may be required even for basic teardown.
At DemoPrep, we handle the legwork — including RBQ compliance, engineer coordination, and permit submissions — to make sure none of these steps are missed.
Required Documents for a Demolition Permit in Montreal
Expect to submit the following:
- Architectural plans (especially for structural removals)
- Site plan showing structure to be removed
- Justification letter or project description
- Photos of existing conditions
- Payment of permit fees (often $400–$1,000+ depending on borough)
Full documentation requirements are listed by borough on the City of Montreal website.
What’s Allowed Without a Permit?
- Removing non-structural interior finishes (e.g., drywall, kitchen cabinets)
- Demolishing structures under 10 m² (with no foundation or utilities)
- Replacing materials with identical ones (e.g., siding)
But again, check with your borough first. Many projects that seem simple can still require zoning review or neighbor notification.
Permit Tips from the Pros
- Use clear, professional drawings — city reviewers often delay unclear or hand-drawn submissions.
- Budget extra time for approval. Some boroughs take 4–8 weeks depending on season and scope.
- Have all neighboring structures mapped out. Proximity to fences, laneways, or trees matters.
- Ask for pre-approval or informal feedback before submitting.
DemoPrep can guide your project from permit to cleanup. Our garage demolition Montreal services include permitting, structural disconnection, and debris removal.
Final Word: Don’t Risk It
Demolition work in Montreal is heavily regulated — even for small projects. The risk of fines, delays, or rework isn’t worth guessing.
If you’re unsure what rules apply, or want help managing the process from start to finish, contact DemoPrep today. We’ll review your project, handle the application process, and ensure your demolition is done legally, safely, and efficiently.