Before you start any renovation project, there's one question you should ask right away: do you need a renovation permit? In Quebec, requirements vary from one municipality to another. Even seemingly minor projects can require official authorization. And without the proper permit, the consequences can be serious : complications when selling your home, denied insurance claims after a loss, or even being forced to tear down what you've built.
This guide clearly explains which projects require a permit, how to submit a building permit application, and what you risk by renovating without authorization. You'll also find the legal steps to obtain your permit and resources to support you through the process.
Which home renovations require a permit?
Reminder: Rules vary from one municipality to another. Always check with your local urban planning department before starting work. In Montreal, requirements can even differ from one borough to the next.
Major interior renovations
Not all interior renovations require a permit but as soon as the work affects the structure, plumbing, or electrical systems, you'll generally need authorization.
Kitchen: Replacing cabinets alone typically doesn't require a permit. However, if you relocate the sink, modify the plumbing, or open a wall to create an open-concept layout, you'll need one.
→ Learn more about kitchen renovation
Bathroom: A like-for-like replacement (same fixture locations) is often exempt. But any change to the plumbing layout or the addition of a new bathroom requires a permit.
Basement: Finishing a basement into livable space requires a permit in the vast majority of municipalities, especially if you're creating an additional dwelling unit (accessory suite).
→ Discover our basement renovation service
Structural modifications
Any work that affects your building's frame requires a permit—no exceptions.
Load-bearing walls: Removing or modifying a load-bearing wall requires not only a renovation permit, but often also plans signed by a structural engineer. A load-bearing wall supports the weight of the roof or upper floor. Unlike a simple partition, you can't remove it without replacing it with an equivalent structural element (beam, column).
Foundations: Any work on the foundation (major repairs, exterior waterproofing with excavation, adding a French drain) generally requires a permit.
Adding beams or modifying the framing: Whether you're creating a mezzanine, raising a ceiling, or reinforcing the existing structure, you need a permit.
Home additions
A home addition is one of the projects that always requires a permit, regardless of the municipality.
Adding a storey: Permit required. Architect or engineer plans are generally needed.
Side or rear extension: Even a modest extension requires authorization, since it changes the building's footprint and setback distances.
Converting a garage into living space: This type of conversion is considered a change of use and requires a permit. Additional requirements may apply (insulation, windows, emergency exits).
→ Discover our home addition service
Exterior renovations
Work on your home's exterior envelope is subject to rules that vary depending on the scope of the project.
Roofing: Replacing shingles with the same material and configuration is often permit-free. However, if you modify the roof structure, add a skylight, or switch to a different roofing material, you'll likely need a permit.
Exterior cladding: Many municipalities require a permit when you replace a certain percentage of the total surface area (often 25% or more). Approved materials also vary depending on zoning bylaws.
Doors and windows: A like-for-like replacement (same size, same location) may be exempted. If you enlarge an opening, create a new one, or modify a load-bearing wall to install a larger window. Be sure to check with your local municipality to find out what your obligations are.
Building a deck, balcony, or staircase
Decks: You generally need a permit when the deck exceeds a certain height (often 60 cm / 24 inches above ground) or a certain area. Even a ground-level deck may require one in some municipalities.
Safety standards: Railings must meet minimum height requirements (generally 42 inches / 107 cm) and precise baluster spacing to prevent falls, especially for young children.
Outdoor staircases: Replacing an existing outdoor staircase may require a permit if the dimensions or materials change.
Adding a garage or permanent shelter
Attached or detached garage: Building a garage requires a permit in nearly all Quebec municipalities, whether it's attached or detached. Zoning rules determine the maximum size, height, and required setbacks from property lines.
Temporary shelters (Tempo-type): Rules vary significantly from one city to another. Some municipalities require a permit, others impose specific installation periods (typically October to April) or maximum dimensions. Check with your local urban planning department for the rules that apply in your area.
Installing a pool or spa
Permit required: In the vast majority of Quebec municipalities, installing a pool (in-ground, semi-in-ground, or above-ground) requires a permit.
Mandatory safety fence: Quebec's Residential Swimming Pool Safety Regulation requires a safety enclosure at least 1.2 metres (4 feet) high with an automatic closing mechanism.
Good to know: Residential Swimming Pool Safety Regulation
Owners of pools installed before November 1, 2010, have been granted an additional 2-year extension. They now have until September 30, 2027, to bring their installations into compliance with the Residential Swimming Pool Safety Regulation.
Minimum distances: Minimum setbacks from property lines and electrical wires must be maintained.
Major plumbing work
Like-for-like replacement: Replacing a faucet, toilet, or water heater in the same location typically doesn't require a permit.
New installation or modification: Adding a bathroom, relocating a sink, or modifying the drainage system requires a permit. The work must be carried out by a contractor holding the appropriate RBQ licence.
Major electrical work
Replacement with an identical item: For certain minor adjustments, such as replacing an electrical baseboard or an electrical outlet, a permit is not required.
Master electrician required: In Quebec, all electrical work (except certain minor replacements) must be performed by a master electrician or under their supervision.
RBQ licence: Make sure your electrician holds a valid RBQ licence.
Inspection: After the work is completed, an inspection may be conducted by an RBQ inspector or a city inspector, or both.
Sheds and storage buildings: When do you need a permit?
Below the thresholds: Most municipalities exempt small sheds (often under 10 m² or 15 m², depending on the city) from permit requirements.
Above the thresholds: If your shed exceeds the maximum permitted area or height, you'll need a permit.
Possible material restrictions: Even without a permit, zoning rules may apply (setback from property lines, materials, colour).
Why is a renovation permit sometimes required?
A renovation permit isn't a bureaucratic hurdle. It's primarily a tool that protects you, your family, and your real estate investment. Here are the three main reasons behind this requirement.
Protecting the safety of occupants
Some renovations directly affect the safety of the people living in your home: electrical systems, structural modifications, plumbing. When a permit is required, a municipal inspector verifies that everything meets current standards, either during the project or once the work is complete.
It may feel like an extra step, but it protects the people living in your home today and those who will live there tomorrow. A poorly installed electrical system or a load-bearing wall removed without proper engineering calculations can have serious consequences.
Complying with municipal bylaws and the Quebec construction code
Each city and even each borough enforces its own urban planning and zoning rules. The Quebec Construction Code, administered by the Régie du bâtiment du Québec (RBQ), sets the provincial framework. Municipalities then layer on their own local requirements: setbacks, maximum height, approved materials, and more.
A municipal inspector can verify your work's compliance at any time during the project or after it's finished. If your work doesn't meet the bylaws, you could be required to correct it at your own expense, even months or years after completion.
Protecting your property's value
Work done without a permit can complicate (or even block) the sale of your home. A potential buyer, their notary, or their financial institution may require you to bring the property up to code before closing the deal. In some cases, an updated certificate of location reveals discrepancies that can cause an offer to fall through.
Getting the proper authorizations upfront protects your property's long-term value. It also ensures your home insurance coverage remains valid in the event of a claim related to the work.
How to get a renovation permit for your home
Getting a renovation permit is simpler than you might think. Here are the steps to follow.
Step 1 – Prepare your plans and required documents
Before visiting the urban planning department, gather the following documents:
Plans or sketches of the work: A scaled drawing showing the current state and the proposed changes. For complex projects (additions, structural modifications), architect or engineer plans may be required.
Material description: A list of the materials you plan to use (cladding, insulation, structural elements).
Cadastral information: Lot number, recent certificate of location.
Estimate or quote for the work: Most municipalities calculate permit fees based on the declared project value.
Step 2 – Submit your application to the urban planning department
In person or online: Many cities now allow you to submit a permit application online—including Montreal and Laval. Other municipalities still require an in-person submission.
Who can submit the application: The homeowner or a contractor authorized in writing. In all cases, the legal responsibility remains with the homeowner.
Complete file = fewer delays: An incomplete file will be returned, which adds delays. Take the time to prepare all documents thoroughly before submitting.
Step 3 – Review Times and Approval
Typical timelines: Anywhere from a few days to 6–8 weeks, depending on the project's complexity and the municipality or even up to a few months for new construction.
Peak periods: Permit applications spike in spring and early summer. If you're planning work for that period, submit your application in winter to avoid delays.
Practical tip: Build the permit process into your project timeline from the start. It's a step that requires planning—not a last-minute formality.
How much does a renovation permit cost?
The cost of a renovation permit varies by municipality, but it typically ranges from 0.5% to 1.5% of the estimated project value. For example, for a $50,000 renovation, the permit could cost between $250 and $750.
Some municipalities charge a flat fee for smaller projects. Check your urban planning department's website or call them directly for current rates.
Good to know:
A renovation permit has a limited validity period, generally 6 months to 1 year, depending on the municipality. If your work isn't finished before it expires, you'll need to apply for a renewal. Factor this into your planning!
Who should apply for the permit: The homeowner or the contractor?
As a general rule, the legal responsibility for obtaining a renovation permit falls on the homeowner. You are responsible for ensuring the work done on your property complies with regulations.
That said, your contractor can act as your representative and submit the application on your behalf. This is common practice, especially for larger projects. However, it's essential to clarify the following in writing in your contract:
Who submits the permit application?
Who pays the associated fees?
Who is responsible in case of non-compliance?
Before entrusting your project to a contractor, always verify that they hold a valid RBQ licence. This check takes just a few minutes and protects you from unqualified contractors.
Which renovations can you generally do without a permit?
Some maintenance and cosmetic renovation work typically doesn't require a permit. Here are the most common examples:
Interior and exterior painting (with no structural changes);
Installing new flooring (laminate, tile, vinyl);
Replacing kitchen cabinets without touching the plumbing or electrical;
Like-for-like equipment replacement (faucets, light fixtures, heating units);
Routine maintenance: cleaning gutters, caulking windows, minor roof repairs.
Good to know:
Even for work that seems minor, always check with your municipality. Some cities have specific requirements, particularly in heritage districts or flood-risk zones.
What are the risks of renovating without a permit?
Doing work without the required permits might seem harmless at the time, but the consequences can be serious and costly. Here's what you're risking:
A municipal fine
Municipalities can impose substantial fines on homeowners who renovate without a permit. The amount varies by city and severity of the violation, but it can reach several thousand dollars.Immediate work stoppage
A municipal inspector can order work to stop at any time if they discover you don't have a permit. Your project will be suspended until the situation is resolved, causing delays and additional costs.Mandatory demolition
In the most serious cases, the municipality can require you to demolish the unauthorized work. You'll then bear the demolition costs on top of the cost of rebuilding to code.Complications when selling
When selling your property, the buyer's notary or financial institution may require proof that the work was done in compliance with regulations. Undeclared work can derail a transaction or reduce your home's value.Insurance problems
If a loss occurs in a part of your home where unpermitted work was done, your insurer could refuse to compensate you. This is a major financial risk that many homeowners underestimate.Financing difficulties
If you want to refinance your property or obtain a home equity line of credit, the financial institution could require you to bring everything up to code before approving your application.
Did you know?
Have you done work without a permit in the past? It's often possible to regularize the situation after the fact by submitting an application to your municipality. Additional fees may apply, but it's better than living with the uncertainty. Contact your urban planning department to find out how to proceed.
RenoAssistance supports you from planning to completion. Our team helps you navigate regulatory requirements and connects you with Verified Contractors who know your municipality's rules.
How RenoAssistance supports you through your renovation project
Navigating permit requirements, finding a reliable contractor, making sure everything is compliant… It can feel overwhelming. That's exactly why RenoAssistance exists.
Our support service (free and with no obligation) is with you at every step:
Feasibility assessment: Our advisors help you understand the regulatory constraints specific to your municipality and project type.
Permit guidance: We guide you on the documents to prepare, the timelines to expect, and the steps to follow when submitting your application.
Connection with Verified Contractors: Every contractor in our network holds a valid RBQ licence and has been verified 360° (references, insurance, quality of work). Over 2,400 contractors are part of our network.
Support from planning to delivery: Our team stays available throughout your entire project, from the first quote to the final walkthrough.
Getting a renovation permit protects your safety, your investment, and your peace of mind. The process is simpler than you think, and the cost of a permit is minimal compared to the risks of renovating without one.
Before starting your next project, take a few minutes to check your municipality's requirements. And if you'd like support through the process—from regulatory planning to connecting with certified contractors, RenoAssistance is here for you.
