A garage is still governed by the Zoning By-law, but the specifics differ from an addition to the house itself.
A garage addition is typically treated as part of the principal structure or as an accessory building depending on its attachment, which changes which setback figures apply. We confirm the right category for your design.
A garage floor is built to a different load standard than a living-space floor, which is a foundation-design decision made before the slab is poured, not after.
A garage slab sits close to grade, so drainage away from the structure is designed in from the start rather than corrected after the fact.
A two-car garage costs noticeably more than a single, and the jump is not simply double the material; a double garage typically needs a wider clear-span roof structure and a larger foundation footprint, both of which carry their own engineering. We confirm your lot has room for the footprint you want, checking side and rear setbacks for accessory structures before pricing either size.
Full-project totals including foundation, framing and a basic finished interior.
$50,000-$90,000
New foundation and slab sized for vehicle load
Framed and finished to match the existing house
Side and rear setback confirmed before design
City of Ottawa permit application included
$100,000-$120,000
Wider clear-span roof structure, engineered
Larger foundation footprint
Matched exterior finish and roofline
Itemised quote after a measured site visit
In Manotick we built a side addition next to the existing house. It sits on a new poured slab and foundation wall, with stud walls framed around a wide front opening and a doorway, and OSB sheathing started on the side wall.
We confirm side and rear setback allowances for an accessory structure before proposing a size.
Foundation and roof structure sized for the garage size and load, with drawings for permit submission.
Slab poured to grade with drainage designed in, then framed and roofed.
Exterior matched to the house, interior finished to your specification, and a final walk-through.
Reviews given to us directly by clients.
Home Additions Experts Ottawa built a beautiful family-room addition for our home. The team communicated clearly, stayed organized, and made sure the new space blended perfectly with the original house.
We hired them to add an extra bedroom and bathroom to our Ottawa home. The workmanship was excellent, and the team kept us informed throughout the entire project. We are very pleased with the finished space.
The team managed our home addition professionally from the initial planning stage through construction. They answered our questions, respected our property, and delivered a result that exceeded our expectations.
These can differ from the setbacks that apply to the main house. Ask specifically what applies to a garage on your lot before agreeing to a footprint.
A garage floor is a different structural spec than a living-space floor. Ask how the slab and its base are being built, not just how thick the concrete is.
A double garage needs a wider clear-span roof than a single. Ask to see the engineering behind it rather than assuming a standard truss will do.
A garage sits close to grade, so drainage away from the structure has to be designed in, not corrected after the concrete is poured.
No. Accessory structures like a garage addition still have side and rear setback requirements under the Zoning By-law, though they can differ from the setbacks for the main house. We confirm your specific allowance before designing.
Yes, any addition that adds floor area or a new structure needs a City of Ottawa building permit, with the fee based on declared construction value.
Yes, if the foundation and framing are designed for it. The conversion is a separate project with its own code requirements for insulation, heating and egress, so tell us up front and we design the garage to make it straightforward.
A double garage typically needs a wider clear-span roof structure and a larger foundation, both engineered separately from a single-bay design, which is why the jump from a single to a double garage is more than a simple doubling.