Converting an existing garage into living space in the GTA generally runs about $25,000 to $50,000 for a basic single car conversion with no plumbing, $50,000 to $80,000 once a bathroom goes in, and $80,000 or more for a full self contained suite. Those are published Toronto contractor ranges, and they are wide for reasons worth understanding before you get quotes.
This page is about a garage you already have. If what you actually want is a new garage built from scratch, our cost to build a garage page covers that instead, and the two jobs have almost nothing in common. A conversion is really a question about insulation, floor level, heating, and whether you can afford to give up the parking space.
These are published Toronto contractor ranges, not our rate card. We show you where each one comes from so you can judge it yourself.
| Scope | Published range | What that range rests on |
|---|---|---|
| Single car garage, no plumbing | $25,000 to $50,000 | Toronto contractor published ranges, confirmed on their own pages |
| Single car, with a bathroom | $50,000 to $80,000 | Same sources. Plumbing is the biggest single jump |
| Double car garage conversion | $50,000 to $90,000 | A second Toronto contractor, confirmed directly |
| Full self contained suite | $80,000 to $150,000 | Adds kitchen, egress, fire separation and permits |
Collected from Toronto contractor pages opened directly on 1 August 2026, not from search snippets. One widely quoted figure was left out because the page it supposedly came from could not be reached and did not contain the word garage when fetched another way. We would rather show you a range with its sources than a single average with none.
Most municipalities in the GTA require a parking space for an added dwelling unit, and your garage is usually where that space lives. Convert it and you have to put the parking somewhere else on the property. This is the most common reason a garage conversion gets refused, and it is worth checking before you spend anything on drawings.
A garage slab usually sits lower than the house floor, slopes toward the door, and has nothing insulating it from the ground. Getting it level, warm and dry is a real part of the job and it is the part most quotes skate over. It is also why two conversions of the same size can be twenty thousand dollars apart.
A garage wall is typically uninsulated and often single skin, and the door opening has to be properly framed and filled. That is closer to building an exterior wall than to finishing an interior one, which is why a garage conversion costs more per square foot than a basement.
Extending the existing house system into a converted garage is sometimes straightforward and sometimes not possible at all. A separate unit is often cheaper than reworking the ductwork you have. Worth asking early, because the answer moves the number more than the finishes do.
If the sanitary drain runs where you need it, plumbing is ordinary work. If it does not, you are looking at breaking the slab or adding a pump. Nobody can tell which from a photo, which is one of the reasons we come and look.
If the plan is a self contained suite rather than extra living space, ceiling height, an egress window, fire separation, a separate entrance and local zoning all come into it, and they interact. That is what takes a conversion from the fifty thousand range into the hundred thousand range.
Give us the address and a time that works for you. No sales pitch and no waiting on a callback.
Slab level, wall build, where the drain and the heat can come from, and what the parking rules mean for your lot. About 45 minutes.
Written down, HST included. Anything we cannot price without opening something up is named next to the number instead of hidden inside it.
One free visit, one fixed price, HST included. No sales pitch and no callback loop.
Book my free visit