You're planning to extend your kitchen, adding a garage or renovating the facade of your home in Longueuil? Before getting out the hammer, it's important to understand the rules of the game.
In 2024, the Ville de Longueuil issued 3,554 urban planning permits for a total value of $89 million. That's a lot of projects - and a lot of homeowners who had to navigate municipal bylaws before starting work.
The good news? With the right information and a little preparation, the process is a lot less complicated than it sounds. In this guide, we'll break down the urban planning regulations that apply to residential renovations in Longueuil - from zoning and permits to deadlines and costs.
Why it's important to know the planning bylaws for a renovation project in Longueuil
Ignoring planning regulations is like playing Russian roulette with your investment. It can work... or it can cost you.
Every municipality in Quebec has its own zoning, height, setback and use regulations. In Longueuil, these regulations are designed to preserve the character of neighborhoods, protect built heritage and ensure the safety of residents.
If you start work without a permit or don't comply with standards, you risk fines, the obligation to demolish what you've built, or even problems when reselling your home. An informed buyer will check for compliance - and non-conformity can derail a sale.
Key licensing statuses and the local market
The renovation market in Longueuil is dynamic. Of the 3,554 permits issued in 2024, some 68 % were for single-family homes.
The Ville de Longueuil covers several boroughs - Vieux-Longueuil, Saint-Hubert, Greenfield Park - and each has its own particularities. Vieux-Longueuil, for example, has heritage zones with stricter rules to preserve its historic character.
Whether you're in a quiet residential area of Saint-Hubert or near downtown, the rules apply. And they're changing: Longueuil has recently adopted new bylaws (such as CO-2024-1285 and VL-2025-839) to modernize its processes and provide a better framework for urban development.
The consequences of non-compliance
Approximately 75 % of planning permit applications are approved on first filing. But 15 % are refused, often because of poorly prepared applications for minor variances or projects that don't comply with zoning.
A rejection means back to square one: you have to modify your plans, sometimes hire a professional to adjust the project, and resubmit. This pushes back your schedule by weeks, even months.
Worse still: if you've already started work without a permit, the city may issue a notice of non-conformity. You'll have to pay additional fees, regularize the situation (if possible), or in some cases, demolish what's been done.
Need free advice before submitting your application? Contact Cartago Construction - we can assess your project and tell you exactly what's needed to get it right the first time.
The main urban planning regulations for renovating a home in Longueuil
Urban planning bylaws in Longueuil affect many aspects of your project: zoning, height, setbacks, land use and even exterior appearance in some areas.
You don't need to be an urban planner to understand the basics. Here's what you need to know to avoid unpleasant surprises.
Residential zoning and permitted uses
Zoning determines what you're allowed to do on your property. In Longueuil, most homes are zoned residential - single-family, two-family or multi-family.
Your certificate of location (which you probably received when you bought your home) indicates your zone. It tells you whether you can add a rental unit to your basement, build a detached garage, or install an in-ground pool.
Some uses are conditional. For example, if you want to convert part of your house into an office for your business, you'll need to check whether the zoning by-law allows this in your area.
Case in point - Vieux-Longueuil versus Saint-Hubert
Vieux-Longueuil is a heritage district with strict rules governing the exterior appearance of buildings. If you're renovating a facade, you may need to obtain approval from the Comité consultatif d'urbanisme (CCU) to ensure that materials and colors respect the character of the neighborhood.
In Saint-Hubert, a newer residential area, the rules are generally more flexible. You'll have more latitude for expansions or exterior modifications, as long as you respect setbacks and maximum heights.
Height, setbacks and density: limits to be respected
Dreaming of adding a third floor to create a master suite with a view? Note: in many residential zones of Longueuil, the maximum height is limited to 10 meters or two storeys (according to by-law VL-2025-839).
Setbacks are the required distance between your house (or extension) and the property line. For example, you generally have to respect a front setback of 6 metres, a side setback of 1.5 metres, and a rear setback of 7 metres.
If your project doesn't respect these distances, you'll have to ask the CCU for a minor variance. And there are no guarantees: the committee will assess whether your request respects the spirit of the by-law and does not affect the neighbors.
A Saint-Hubert homeowner wanted to extend the rear of his garage by 3 meters. Problem: it encroached on the mandatory rear setback. He had to present his project to the CCU, explain why it was necessary, and finally adjust his plans to meet the standards. The result: a two-month delay.
Built heritage, PIIA and historic zones
Old Longueuil is subject to a Site Planning and Architectural Integration Program (SPAIP). This means that any exterior modification - façade, roofing, windows, siding - must be approved by the CCU before you can obtain your urban planning permit.
The aim? To preserve the heritage character of the area. If you're replacing your windows, for example, you may need to choose a model that respects the original architectural style.
The process takes longer, but it protects the heritage value and appeal of the neighborhood. And frankly, a well-integrated project will add value to your home in the long term.
Are you in a heritage zone? Get a free diagnosis with Cartago Construction - we know the requirements of the PIIA and can help you prepare a solid file that meets the CCU's criteria.
Accessory uses, outbuildings and landscaping
Would you like to build a garden shed, carport, pergola or patio? These elements are considered accessory uses or outbuildings, and are governed by regulations.
Contrary to popular belief, even a small garden shed may require a permit if its surface area exceeds a certain threshold (often 10 m²) or if it is built too close to the property line.
For a detached garage, you'll need to respect setbacks, maximum height and sometimes even maximum surface area. If you're installing an in-ground pool, safety and distance rules also apply.
The myth of «it's small, you don't need a permit»? Forget it. If you don't want to receive a Notice of Non-Compliance, check with the City before you start - or get an experienced contractor like Cartago to do it for you.
Steps to apply for an urban planning permit in Longueuil
Once you've understood the rules, it's time to take action: prepare your file and submit your permit application. Here's how it works.
Preparing essential documents
Incomplete files are the number one reason for delays and rejections. Around 15 % of applications are rejected or delayed because documents or information are missing.
Here's what the Ville de Longueuil usually asks for when applying for a planning permit:
Certificate of Location This document shows the exact location of your house on the lot, dimensions, current setbacks, etc. If your certificate is more than 10 years old, you may need to update it.
Layout plan A plan to scale showing where your extension, garage or other construction will be located. It must include distances from property lines.
Plans and elevations Technical drawings that show what your project will look like (front view, side view, cross-section). For exterior renovations If you're planning a major project, you'll need plans drawn up by a technician or architect.
Photos Recent photos of your home and the surrounding area, so that the CCU can assess architectural integration.
Request form Completed and signed, available on the City's online portal.
Deposit fees Depending on the type of project (discussed below).
If your project involves felling a tree over 50 cm in diameter, you'll also need to provide an arboricultural plan or justification.
Download Cartago Construction's free checklist for your application - we've created it based on dozens of files we've submitted. So you don't forget an important document.
Submission via the Online Permits portal or in person
Good news: some 85 % of Longueuil's urban planning permit applications are now submitted online via the city's Permis en Ligne portal. It's faster, more convenient, and you can follow the progress of your file in real time.
You create an account, upload your documents (preferably in PDF format), pay the fee by credit card, and off you go. You'll receive an e-mail acknowledging receipt.
If you prefer to submit your application in person, you can go to city hall or to the Direction de l'urbanisme (4250, chemin de la Savane, Longueuil). However, processing times may be slightly longer.
On average, before the recent reforms, the approval time was between 20 and 30 working days. With new digital tools and modernized processes, the City aims to reduce this time by 50 % over the next few years.
Follow-up, approval or modification request
Once your file has been submitted, an urban planning inspector will analyze it. If everything is in order, you will receive your certificate of authorization (the famous permit) by e-mail or regular mail.
If your project requires a minor variance or is located in a PIIA zone, it will be submitted to the Comité consultatif d'urbanisme (CCU). The CCU generally meets once a month. They will evaluate your project, and either approve it or ask for adjustments.
In some cases, the inspector may contact you to ask for clarification or additional documentation. This is where things can get a bit messy if you don't have the right information at hand.
In 2025, the Ville de Longueuil introduced an online pre-verification tool (GIS system) that lets you check certain information before submitting your application. This reduces errors and speeds up processing.
Cartago supervises your application for error-free filing and efficient follow-up. - we know the City's requirements and we know exactly what to supply to avoid unnecessary round-trips.
Costs, deadlines and tips for avoiding bottlenecks
Let's talk about money and time. How much does it cost, how long does it take, and how can we avoid the pitfalls?
Typical costs and added value
Planning permit fees in Longueuil vary according to the nature and value of your project. Here's a general idea:
Basic request Between 200 $ and 800 $, depending on the type of project (extension, accessory construction, exterior modification, etc.).
Inspection fees Approx. 100 $ per inspection visit (typically 2 to 3 inspections for an average project - pre-construction, during, and final).
Minor variance If you have to go before the CCU for a variance, add between 500 $ and 1,500 $ depending on complexity.
Arboriculture plan If you need to cut down a protected tree, expect to pay between 300 $ and 600 $ for a certified arborist's report.
These fees may seem high, but they guarantee that your project is compliant and that you won't encounter any problems when you resell your home. It's an investment in peace of mind.
Processing times and how to reduce them
The average processing time for an application for an urban planning permit in Longueuil is 20 to 30 working days - about one month. But it can be longer if your file is incomplete, if you need a variance, or if your project goes before the CCU.
To speed up the process :
Submit a complete file right from the start : The clearer and more complete your documents, the less back-and-forth there will be.
Use the GIS pre-check tool This allows you to verify certain zoning information before filing.
Plan around the CCU calendar If your project requires committee approval, check the meeting dates and submit your file accordingly.
Work with a contractor who knows the process An experienced professional knows exactly what you need to provide and how to prepare a solid dossier.
Submit a complete file + use GIS pre-check = significant time savings.
Common mistakes and how to avoid them
Here are the most common errors that delay or cause refusal of planning permit applications in Longueuil:
Outdated or missing certificate of location If your certificate is more than 10 years old or does not reflect current construction, update it before filing.
Incomplete or inaccurate plans Plans without dimensions, without scale, or that do not clearly show the setbacks will be rejected.
Wrong zone or use You think you can do something that's not allowed in your zone. Check the zoning by-law before preparing your plans.
The myth of interior work : Many people think that interior renovations do not require planning permission. This is not the case if your project modifies the structure, adds accommodation or changes the use of the space.
Ignoring accessory rules Building a garden shed, patio or pergola without checking whether a permit is required.
Avoid rejections - request a free pre-deposit audit with Cartago Construction - we can go through your project and tell you exactly what's required to make it run smoothly.
Frequently asked questions about urban planning by-laws in Longueuil
Here are the questions we're most often asked about urban planning bylaws in Longueuil.
Do I need planning permission to extend my garage in Longueuil?
Yes, almost always. Any extension or construction of a garage (attached or detached) requires an urban planning permit. You'll need to comply with setbacks, maximum height and, in some cases, maximum surface area.
Are interior works (kitchen/bath) subject to planning regulations?
It all depends. If you're simply renovating a kitchen or a bathroom without affecting the structure or changing the use of the space, you generally don't need planning permission. However, you will need an RBQ building permit if the work involves plumbing or electricity. If you're adding a rental unit or modifying the structure (removing a load-bearing wall, etc.), then yes, planning permission is required.
What is a minor variance via CCU?
A minor variance is special permission to deviate slightly from the bylaws (for example, to build a little closer to the lot line than is normally permitted). Your request goes before the Comité consultatif d'urbanisme (CCU), which assesses whether the variance is justified and does not affect neighbors or the character of the area.
How much does it cost to apply for an urban planning permit in Longueuil?
Between 200 $ and 800 $ for the basic application, depending on the type of project. Add about 100 $ per inspection (usually 2 to 3) and between 500 $ and 1,500 $ if you have to go before the UCC for a variance.
What are the typical deadlines after filing?
On average, 20 to 30 working days for a standard file. If your project requires CCU approval or if your file is incomplete, it may take longer (up to 60 days in some cases).
Is my area in the heritage zone (Vieux-Longueuil)?
Vieux-Longueuil has several heritage zones subject to the Architectural Site Planning and Integration Program (PIIA). You can check on the Ville de Longueuil website by consulting the interactive zoning map, or call the Direction de l'urbanisme at 450-463-7270.
What should I do if my application is rejected?
If your file is rejected, the inspector will explain why. You can then modify your plans to comply with the regulations and resubmit. If the CCU refuses, you can revise your variance request or adjust your project. In some cases, you can also contest the decision with the municipal council.
Can an urban permit be combined with an RBQ construction permit?
Yes, and it's often necessary. The urban planning permit confirms that your project complies with municipal bylaws (zoning, setbacks, etc.). The RBQ construction permit confirms that the work complies with safety and construction standards (Quebec Construction Code). For major projects, you'll need both.
For questions specific to your home or project, contact Cartago Construction for a free appointment. - we take the time to understand your project and guide you through every step.
Why choose Cartago Construction for your compliant renovations in Longueuil?
Navigating urban planning regulations, preparing a solid file, and getting your permits quickly, all require experience and a good knowledge of the terrain. That's exactly what we offer at Cartago Construction.
Local expertise and compliance guaranteed
Cartago Construction is based in Longueuil, at 2580 Rue Cartier. We work mainly on South Shore - Longueuil, Saint-Hubert, Greenfield Park, Brossard - and we know the bylaws inside out.
Our founder, Yassine Troudi, has over 10 years' experience in residential construction in Quebec. We've filed dozens of urban planning permit applications, worked with the CCU, and know exactly what it takes to get your project approved the first time.
We're RBQ-certified and fully insured. That means your work not only complies with urban planning bylaws, but also with all construction and safety standards in force in Quebec.
Humane, transparent, turnkey approach
At Cartago Construction, we don't leave you to deal with the paperwork alone. We take care of everything: initial assessment, file preparation, application submission, follow-up with the city, and coordination of work once the permit has been obtained.
Our approach is to be transparent from start to finish. We explain what's required, give you a clear estimate of costs and timescales, and stay in touch throughout the process.
We also work with a network of trusted subcontractors - surveyors, engineers, technicians - to offer you a turnkey service. You have a single point of contact, and we manage everything for you.
Schedule your free pre-renovation inspection with Cartago Construction today - we come to your home, evaluate your project, tell you exactly what's required in terms of permits, and give you a detailed quote. No obligation.
📞 438-932-4326
✉️ [email protected]
🌐 cartagoconstruction.ca
Planning a renovation project in Longueuil? Don't let urban planning regulations slow you down. With Cartago Construction, you have a local partner who knows the rules, who knows how to prepare a solid file, and who will make sure your project gets off on the right foot - by the book, on time, and with no nasty surprises.
