Découvrez notre guide des prix liés à la réalisation d’un agrandissement de maison. Quels facteurs influencent les prix ? Quels sont les coûts additionnels à prévoir ?

Vous accumulez de plus en plus de choses et vos enfants grandissent, mais votre maison semble rapetisser à vue d’œil ? Si votre demeure ne répond plus à vos besoins en termes d’espace, c’est peut-être qu’il est temps de penser à un projet d’extension de maison. Quels sont les prix moyens d'un agrandissement ? Quels facteurs influencent ces coûts et quels frais additionnels devez-vous prendre en compte ? Cet article répond à ces questions pour vous aider à mieux planifier votre projet.

Quel coût pour un agrandissement de maison ? Guide de prix 2025

Quoi savoir pour un projet d'agrandissement de maison: moyenne de prix, questions à prendre en compte, permis à obtenir, où faire son agrandissement...

La maison a beau manquer d'espace, pourquoi quitter l'emplacement idéal dans lequel les enfants ont grandi ? Le&nbsp;déménagement&nbsp;étant hors de question, l'agrandissement de maison s'impose.&nbsp;Si c'est la situation dans laquelle vous vous trouvez, alors vous êtes au bon endroit. Notre article vous expliquera tout ce que vous devez savoir sur la construction d'une extension de maison.

Planifier un agrandissement de maison : par où commencer ?

Une garde-robe walk-in peut complètement transformer l'aspect d'une chambre des maîtres tout en vous donnant amplement d'espace de rangement.

Les placards font partie des espaces les plus importants dans une maison, permettant le rangement de votre garde-robe et de bien d'autres éléments comme vos chaussures, vos bijoux et d’autres accessoires. 

Planifier la conception d'un walk-in

All About Building Permit Costs in Ottawa

Regardless if you’re a renovation novice or an expert, a contractor even, the world of building permit requests is tricky to navigate. Of course, if you’ve taken on a renovation project or two, then you’re most likely aware of everything that's of importance, like applying for permits in the first place. In 1976, Ontario established the Building Code Act, to regulate and increase renovation quality control while offering homeowners protection. Therefore, if you’re renovating a structure in the City of Ottawa, you have to determine whether or not a work permit is required.

Building permits were first established to ensure health, safety, structural soundness, as well as peace of mind during the construction process. Not only can a permit offer an additional level of comfort but it can prevent significant city-related issues down the line. Read on for all of the crucial information regarding building permit costs in Ottawa.

When and Why You Need and Should Apply for a Building Permit in Ontario

Source: Canva

What requires a building permit for house renovations in the City of Ottawa?

Now, before you get carried up with your hammers and nails, or even consider drawing up blueprints, you’re going to want to get your building permit application process going. Everything has to be factored in. As mentioned briefly in our introduction, when it comes to understanding the steps required for an Ottawa-based renovation project, the <a href="https://www.toronto.ca/services-payments/building-construction/apply-for-a-building-permit/building-permit-regulations/">Building Code Act</a> is the place to start. The Building Code Act states that a building permit is required for any construction and/or demolition of a new building, and addition or material changes. These changes include material structures, not just buildings alone.

This means that taking on pretty much any renovation project requires a permit. Even if you think that the renovation you’re planning is on the smaller, or simpler, side of things, chances are you're still going to need a permit to proceed legally. So definitely look into permit requirements. Check with certified contractions, they often have all the information you're looking for. And, as it so happens, there’s a long list of construction work done on a house that requires a permit, no matter what, and they're as follows:

We highly recommend heading to your local municipal office or checking with your city's urban planner to determine whether the project you're planning requires a permit. Nowadays, almost everything can be found online, the Internet is a real information gem. You'll be able to gather details regarding your municipality, inspections/inspectors, contractors, building height requirements, etc. In a nutshell, if you plan on proceeding with a home improvement project that won’t require structural changes, such as finishing a basement, or installing additional insulation or roof vents, you'll most likely not need a permit.

The common renovation projects that don't typically require a permit are as follows:

How much does a building permit cost in Ottawa?

There's a long list of different building permits, each with their respective costs, as regulated by the City of Ottawa. For the purpose of this article, we’re going to take a look at some of the more common project costs. However, for a full list of all costs involved, for specific permits, <a href="https://ottawa.ca/en/residents/building-and-renovating/forms-applications-and-fees#comprehensive-building-code-fee-schedule">click here</a>.

The basic building permit fee calculated by the Building Department of Ottawa is $11&nbsp; for every $1,000 of the project's accessed valuation.&nbsp;The minimum fee for a permit application is always $100.

For new buildings or additions to existing structures: <a href="https://ottawa.ca/en/planning-development-and-construction/building-and-renovating/forms-applications-and-fees#section-19e46463-7e6d-490b-a66c-02d211077d32">the minimum fee is always $100</a>.

Demolition: $1,000 - $3,000

Change of use: $108 per application

Plumbing work: $100 per application

Building a fence or pool enclosure: $200

How to Contact the City and Prepare for Your Renovation Permit

When submitting permit applications, whether in person or via their website, representatives of the City of Ottawa will need to see a clearly defined plan of the planned project. Nothing can be left open to questioning. This is especially true if any architectural, plumbing or mechanical work is being done. Renovation plans can be drawn by you or by a certified architect, depending on the details needed. Alongside these, you’ll need a Building Code Identification Number (BCIN). This number will help speed up the process.

Depending on how complex the project you’re planning is, the review period for your permit will vary. However, for the majority of residential renovations, the waiting period typically falls between 5 and 10 business days. Once accepted and with plans in hand, you’ll need to stick your permit somewhere that's visible streetside, place it either in a window or in a visible area on your home. On another note, in Ontario, specific inspections are required for different steps of the renovation process. Meaning, you'll have to bring in an inspector. When you pick up your permit, the specifications of this should be provided to you. Be sure to carry out plenty of research leading up to the renovation; ask questions, as this will prevent setbacks and any difficulties experienced during the completion of your project.

Revamp your home with marble-look tiles, an affordable solution for a luxurious-looking décor.

You can now reap the unique benefits of marble while leveraging the functional qualities of ceramic tiles. The all-new marble-look tiles are suited to all rooms in a home, spanning traditional and modern styles. Whether used throughout or subtly, design and colour are both striking, resulting in a definite eye-catching result that resonates with all.&nbsp;&nbsp;

A Taste of Affordable Luxury: Marble-Look Tiles

If you're spending a lot of time at home, you may be looking for inspiration to change up and revive your rooms! Read on for just that

Whether working, taking care of young ones, recovering from a cold or cooped inside for one reason or another, there are times when we’re stuck at home for days with no end in sight. 

The Best Home Improvement DIY Projects

A home extension or addition project involves various costs that differ based on the type of extension ordered. Check out the following for more information!

As your house shrinks before your very eyes on account of a new family member, or simply because your home just doesn’t suit your needs anymore, know that moving isn’t your sole option! Building a home extension or addition is, too, a possibility!

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