.svg)
.svg)
.svg)
Garage Additions
in Ottawa
Enhance your home with a custom garage addition in Ottawa. Whether you need extra storage, a workshop, or additional parking, our expert team designs and builds garages tailored to your needs.
Boost your property value and functionality with a high-quality garage addition. Let us bring your vision to life!
Contact us today for a free quote
Get a free no-obligation quote for your next project in seconds.
More Than Somewhere to Park the Car
A new garage does more than get your vehicles out of the snow. A well-built attached or detached garage adds secure storage, a workshop, and protected entry to your home, and it can carry a bonus room, home office, or full suite on top. OGC designs and builds garages that match your house and stand up to Ottawa winters.
The difference between a garage that lasts and one that heaves and cracks is under the ground. Ottawa's frost line runs about 1.5 metres deep, so a heated garage, or anything with living space above it, needs proper frost-depth footings, not a floating slab. We engineer and build it right, and handle the permits from the first drawing to the final inspection.
- Attached, detached, or a garage with a room or suite above
- Frost-depth foundations engineered for Ottawa's climate
- Exterior, roofline, and doors matched to your existing home
- Fixed pricing, permits handled, and a 7-year warranty
How Our Garage Additions in Ottawa Work
A garage is a real structure with a real foundation, not a shed. Here is the design-build process OGC follows to take your garage addition from first idea to a finished, inspected build.
We look at where the garage can go, whether attached or detached makes more sense for your home, and what your lot's setbacks and lot coverage allow, before you spend on design.
- On-site review of the best location and orientation
- Attached versus detached guidance for your lot
- Setback and lot-coverage check, plus a budget range
We design the garage around how you will use it, its size, door count, and whether you want a bonus room or suite above, and match the roofline and finishes to your home. You see it in 3D before we build.
- Sizing for vehicles, storage, and any workshop space
- Optional room or suite above designed in from the start
- 3D renderings with the exterior matched to your home
A garage needs a building permit and has to meet Ottawa's zoning for setbacks, height, and lot coverage. We engineer the frost-depth foundation, prepare the drawings, and handle the full City of Ottawa permit.
- Setback, height, and lot-coverage compliance confirmed
- Frost-depth foundation engineered for the load
- Building permit and any minor variance handled by OGC
Before construction begins, you get a detailed, fixed-price contract covering the full scope. The number you approve is the number you pay, backed by our price-match guarantee.
- Line-by-line scope with no vague allowances
- Fixed price with no surprise change orders
- Financing options available for qualified homeowners
We pour the frost-depth footings or frost walls, frame the garage and any floor above, and finish it with a roof, doors, and siding matched to your home so it looks original, not bolted on.
- Frost-depth footings or frost walls, not a floating slab
- Framing engineered to carry any room or suite above
- Roof, garage doors, and siding matched to your home
We walk the finished garage with you, book the City's final inspection, and hand over a 7-year warranty so your build is protected for years to come.
- Detailed walkthrough and deficiency review with you
- Final City of Ottawa inspection booked and passed
- Industry-leading 7-year OGC warranty handed over
Our Garage Addition Portfolio
A sample of attached garages, detached garages, and garages with living space above that we have built for homeowners across Ottawa.
Why Ottawa Homeowners Choose OGC
For over a decade, OGC has been one of Ottawa's most trusted garage builders and the city's most reviewed design-build firm, with 200+ verified reviews across Google, Houzz, and HomeStars.
Built for Ottawa, Not Just Anywhere
We build every garage on a frost-depth foundation engineered for Ottawa's 1.5-metre frost line, so it does not heave, crack, or pull away from your house over our winters.
One Dedicated Project Manager
A single project manager runs your entire garage build and stays reachable by phone or text the whole way through. No handoffs, no gaps, no wondering who is in charge.
See It Before We Build It
Every garage starts with full 3D renderings so you can see the size, the doors, and the matched exterior before construction begins. Change it on screen, not on site.
Fixed Pricing, No Surprises
What you are quoted is what you pay. No hidden fees, no mid-project change orders. OGC's price-match guarantee backs every contract we write.
Industry-Leading 7-Year Warranty
OGC backs every garage with a 7-year warranty, one of the strongest in Ottawa. A garage is a structure you will use every day for decades, and it should be built to last.
Ottawa's Most Recognized Renovation Team
OGC is a member of the GOHBA, Tarion, RenoMark, CHBA, and the Ottawa Chamber of Commerce, and has been named Ottawa's Small Business of the Year. Our work has been featured on CTV, HGTV, and in Ottawa press.
Building a Garage in Ottawa: What's Involved
A garage is deceptively technical, foundations, zoning, and structure all matter. Here is what we manage to build one that lasts and passes inspection.
In Ottawa the ground freezes to roughly 1.5 metres, so any garage we heat year-round or build living space above has to sit on frost-depth footings or frost walls, not a floating slab. That is what stops it from heaving and pulling away from your house.
Attached gives you heated, direct access from the house but has to tie into your existing structure and roofline, which adds cost. Detached is often more affordable and flexible, with lighter setback rules and easy room to build up. We help you choose the right one for your lot and budget.
Ottawa's zoning controls how close to the property line a garage can sit, how tall it can be, and how much of your lot can be covered, and front-yard garages are generally not allowed. We confirm all of it early and handle a minor variance through the Committee of Adjustment if your design needs one.
Want a bonus room or a rental above the garage? The structure has to be engineered to carry that upper floor, with code-compliant stairs. And in Ottawa, a living unit above a detached garage is treated as an additional dwelling unit or coach house, with its own rules, which we design to from the start.
Just about any real garage needs a City of Ottawa building permit and a series of inspections, from footings through framing to final. We prepare the drawings, pull the permit, and manage every inspection so the finished garage is fully approved. Here's more on garage permits in Ottawa.
What a Garage Addition Costs in Ottawa
Cost depends on whether the garage is attached or detached, its size, and whether you add a room or suite above. Here is the range Ottawa homeowners are working within.
double garage
double garage
room or suite above
Foundation & Frost Work
The frost-depth footings or frost walls that keep a garage from heaving are one of the biggest single costs, especially for a heated garage or one carrying living space above.
Attached vs Detached & Size
Attached garages cost more to tie into your existing structure and roofline, while a larger footprint or a third bay raises the total. Garage additions in Ottawa generally run about $75 to $140 per square foot.
Room Above & Finishes
Adding a heated bonus room or a full suite above is the biggest upgrade, since it needs an engineered structure, stairs, insulation, and finishes. It also adds the most usable space and value.
Want the full breakdown by garage type? Read our detailed guide to garage addition costs in Ottawa.
Garage Addition Questions
The questions Ottawa homeowners ask us most before building a garage.
Most garage additions in Ottawa run about $35,000 to $70,000 for an attached double, $45,000 to $80,000 for a detached double, and $95,000 and up for a garage with a room or suite above, or roughly $75 to $140 per square foot. The foundation and any structure to carry an upper floor are the biggest cost drivers. See our full garage addition cost guide for a detailed breakdown.
Yes. Just about any real garage requires a City of Ottawa building permit, along with zoning approval for setbacks, height, and lot coverage, and a series of inspections. OGC prepares the drawings and handles the entire permit process for you. Here's more on garage permits in Ottawa.
It depends on your lot and how you will use it. Attached gives you heated, sheltered access straight into the house, which many Ottawa homeowners value in winter, but it costs more to tie into your existing structure. Detached is usually more affordable, has lighter setback rules, and makes it easy to add a loft or suite above. We will recommend the best fit at your free consultation.
In most cases, yes, and it is a great way to add a home office, bonus room, or rental. The garage has to be engineered to carry the upper floor and have code-compliant stairs. In Ottawa, a living unit above a detached garage is treated as an additional dwelling unit or coach house, with its own zoning and Building Code rules, which we design to from the start.
Deep enough to get below the frost line, which in Ottawa is about 1.5 metres. An unheated detached garage for cars can sometimes sit on a properly built slab, but a heated garage, or one carrying a room above, needs frost-depth footings or frost walls so it does not heave over winter. We engineer the foundation to match your specific garage.
Construction on a detached garage usually runs about 4 to 8 weeks, an attached garage about 6 to 10 weeks, and a garage with a room above roughly 8 to 14 weeks, plus design and permitting beforehand. We give you a realistic schedule before work starts.
Yes. Matching the garage to your home is part of our design work. We blend the roofline, siding, trim, and door style so the new garage looks like it was always part of the property, not an add-on.
Areas We Serve
OGC designs and builds garage additions across Ottawa and the surrounding region, including:
.png)
Quick Response
You'll receive a response from a specialist within 24 hours.
.png)
Unbiased Advice
Expert face-to-face advice for your renovation project.
.png)
No Commitments
There's absolutely no pressure or commitment to buy.
.png)
Fixed Pricing
No surprises, and no hidden fees.
no-obligation quote
.png)
Visit us
1886 Merivale Road #200, Nepean, ON K2G 1E6Sit with a specialist and visit our design center.
.png)
