Every number on this page comes from the signed contract values of completed Desire Basements projects or from the published City of Toronto and Ontario Building Code schedules. No averages borrowed from American websites.
Basement pricing in Toronto is a per-square-foot conversation, but the rate only tells you something once you know what it buys. We publish three finish levels, and every project we quote starts from one of them. The table multiplies those rates by the basement sizes we see most often in Toronto houses. A post-war bungalow in Scarborough or North York usually has 800 to 1,000 sq ft below grade; a newer two-storey in the suburbs can have 1,200 to 2,000.
| Basement size | Essential · $55/sq ft | Signature · $70/sq ft | Luxury · $90/sq ft |
|---|---|---|---|
| 800 sq ft | $44,000 | $56,000 | $72,000 |
| 1,000 sq ft | $55,000 | $70,000 | $90,000 |
| 1,200 sq ft | $66,000 | $84,000 | $108,000 |
| 1,500 sq ft | $82,500 | $105,000 | $135,000 |
| 2,000 sq ft | $110,000 | $140,000 | $180,000 |
Starting rates for the finished space, before the add-ons in the next sections. Rates are the same published figures our cost calculator uses.
The three levels are not good, better and best versions of the same room. They are different amounts of design.
Clean, warm and complete. Permits and inspections, metal-stud framing, insulation, moisture-resistant drywall, pot lights, luxury vinyl plank flooring, paint and full detailing. This is the level for a family room, a playroom and a bedroom where the goal is finished square footage that feels like the rest of the house, without feature walls or custom millwork.
The level most Toronto clients choose. Everything in Essential plus feature walls, designed bulkheads instead of boxed-in ducts, upgraded millwork and a lighting plan with LED coves and dimmable zones. The difference shows in the ceiling and the TV wall, which is where a basement either looks designed or looks finished.
Custom everything. Stone surfaces, integrated LED coves, hotel-grade detail, full-height media walls, glass partitions and wine displays. Most projects at this level also add a theatre, a bar or a gym, which is why the completed-project median sits above the per-square-foot rate.
The fastest way to be misled by a basement quote is to compare the bottom line without comparing the scope. Every Desire Basements quote includes the items below, and every quote is fixed and itemized before you sign: the number does not move after the drywall goes up.
| Always included | What it means for a Toronto project |
|---|---|
| Permits and inspections | We apply to Toronto Building, pay the fees and book every inspection. The permit is in your name, on the record of the house. |
| Free 3D design | You see the finished basement rendered in your own space before anything is ordered. |
| Floor protection and a 20-yard bin | Toronto semis and row houses bring material through the front door; protection is not optional. |
| Full detailing | Trim, caulking, paint touch-ups and a final clean, so handover day is the finished product. |
| Lifetime workmanship warranty | On the whole build, not a two-year clock. |
| $200-a-day on-time guarantee | The written timeline is in the contract. If we run past it, we pay you for every day. |
What the per-square-foot rate does not include: the bathroom, the bar, the theatre, a walkout entrance and structural work such as underpinning. Those are quoted as separate lines so you can add or remove them and watch the total change. The next two sections put numbers on each.
Features move the price more than the neighbourhood does. Comparing our completed projects since 2022, the average project that includes a home gym came in at $150,000 against $94,000 without one; a dedicated theatre room averaged $125,000; a custom bar, which shows up in roughly eight of every ten recent projects, averaged $114,000. The add-on prices below are the itemized lines we quote.
| Add-on | Typical cost | Notes |
|---|---|---|
| Three-piece bathroom with tiled shower | $18,000–$28,000 | The standard basement build; rough-in plumbing, fixtures, waterproofed tile, vanity, ventilation. Bathroom cost guide |
| Two-piece powder room | $10,000–$14,000 | Where a rough-in already exists |
| Breaking concrete for new drains | +$3,000–$6,000 | Common in older Toronto houses with no basement rough-in |
| Sewage ejector pump | +$2,000–$4,000 | When fixtures sit below the sewer line |
| Custom wet bar | +$15,000 | Millwork, sink, fridge rough-in, stone top |
| Home theatre setup | +$20,000 | Acoustic treatment, riser platform, wiring, star-ceiling ready |
| Walkout basement entrance | $15,000–$25,000 | All in: excavation, concrete, door, railings, permits. Walkout cost guide |
| Full-perimeter underpinning | $60,000–$120,000 | $350–$600 per linear foot, engineering and new slab included. Underpinning cost guide |
| Bench footing | $300–$500 per linear foot | Cheaper than underpinning, but each wall gives up 12 to 24 inches of floor. Which one to choose |
A worked example, using only the numbers above. A 1,000 sq ft Signature basement is $70,000. Add a three-piece bathroom at the low end of its range and a wet bar: $70,000 + $18,000 + $15,000 = $103,000. That is not a coincidence; it is the median project in our data, and it is what a typical Toronto family basement with a bathroom and a bar actually costs.
A basement in Vaughan and a basement in the old City of Toronto are priced from the same rate card, but Toronto houses put more of the budget into the things you cannot see. Three items come up on almost every Toronto quote.
Toronto Building's fee schedule effective January 1, 2026 sets a minimum permit fee of $214.79. Finishing a basement in a house is charged at $6.20 per square metre of floor area; interior alterations in a residential occupancy are charged at $11.53 per square metre, rising to $13.41 per square metre where floors are replaced. For a 1,000 sq ft basement, which is about 93 square metres, that is roughly $577 for a basement-finishing permit or about $1,072 if the work is classed as interior alterations. A secondary suite is filed as an interior alteration and adds a $56.33 fee for each new residential unit, with the fire-separation and egress review inside the same permit.
The fee is small next to the project. What costs money is not having one. An unpermitted finished basement is a problem at resale, at the insurance claim and at the moment a buyer's home inspector opens the electrical panel. Every Desire quote carries the permit line; if a competing quote does not, ask why. Our permit guide covers what triggers a permit in Ontario.
The single largest cost swing in a Toronto basement is the height of the ceiling you start with. Bungalows and semis built before the 1960s across Scarborough, East York, North York and the west end often measure six feet or a little more from slab to joist. The 2024 Ontario Building Code allows a secondary suite in an existing house with a ceiling as low as 1.95 metres (about 6 feet 5 inches), and 1.85 metres under beams and ducts. That is the legal floor. It is not what most people want to live under, and it leaves no room for a designed ceiling, a proper subfloor or ductwork bulkheads. Where the ceiling is short, the choices are underpinning at $60,000 to $120,000 for a full perimeter, or bench footing at $300 to $500 per linear foot with a concrete ledge along every wall. That decision comes before any finish is chosen, and we make it with a structural assessment, not a guess.
Older Toronto foundations are rubble stone or early poured concrete. Cracks, active leaks and old insulation get fixed before drywall goes up, because the alternative is a cheap quote that stays cheap until the first spring thaw. Semis and row houses have no side-yard access, so excavation for a walkout or an underpinning job leaves through the front door, which adds labour. Knob-and-tube or a 60-amp panel in the house means an electrical upgrade before a basement can carry a kitchen or a bathroom. None of these are reasons not to finish a Toronto basement. They are reasons to insist on a quote that names them.
Toronto's housing rules now encourage second units, and a basement apartment is the most common way to add one. Purpose-built legal suites in our projects typically land between $75,000 and $110,000+, before underpinning where the ceiling is too low. The extra money over a family basement buys the things the Code requires: a separate entrance, a full kitchen, a three-piece bathroom, a 30-minute fire separation between the units, interconnected smoke alarms throughout the house, carbon monoxide alarms beside every bedroom, an egress window with at least 0.35 square metres of clear opening and no side shorter than 380 mm, and an 810 mm suite door.
| Legal suite line item | Typical cost |
|---|---|
| Finished space, 800 to 1,000 sq ft at Essential or Signature | $44,000–$70,000 |
| Three-piece bathroom | $18,000–$28,000 |
| Walkout or separate entrance | $15,000–$25,000 |
| Kitchen, fire separation, alarms, egress window | included in the suite quote |
| Underpinning, only where the ceiling is under the Code minimum | $60,000–$120,000 |
The income side: GTA legal suites rent for $1,700 to $2,400 a month in 2026, which puts gross payback at roughly 4 to 6 years on a suite built without underpinning. Our legal basement apartment page walks through the permit path, and the rental income guide has the payback math by rent level.
We publish median completed-project values by city where we have enough projects for the number to mean something. Within the City of Toronto, North York qualifies: a $105,000 median. Scarborough, Etobicoke and the old city do not yet have enough completed projects in the sample for a separate median, so we quote them against the GTA figure and the site conditions above. The wider table is useful for one reason: it shows that the differences come from what people build, not from different rates.
| City | Median project | Average project |
|---|---|---|
| Aurora | $112,000 | $125,000 |
| North York (Toronto) | $105,000 | $81,000 |
| Vaughan | $104,000 | $114,000 |
| Newmarket | $102,000 | $116,000 |
| East Gwillimbury | $96,000 | $95,000 |
| Richmond Hill | $91,000 | $111,000 |
| Markham | $89,000 | $110,000 |
| Caledon | $84,000 | $92,000 |
| Oakville | $82,000 | $128,000 |
| Mississauga | $76,000 | $59,000 |
| Milton | $67,000 | $70,000 |
Completed Desire Basements projects, 2022–2026. Cities without enough projects for a reliable median are excluded. Source: The Real Cost of a GTA Basement Renovation, 2026 report.
Two things the table says about Toronto. North York's median is high because its projects are large houses with full feature builds, not because we charge North York more. And the average sitting below the median there means a handful of smaller, simpler projects pull it down: bungalow basements finished at Essential for a growing family or an aging parent.
Illustrative tiers assembled from our completed-project data. Every real project is quoted on its own, but these are the three builds we deliver most often, and most Toronto clients recognise themselves in one of them.
| Build | Typical size | Typical cost | What it includes |
|---|---|---|---|
| The family basement | around 1,000 sq ft | $60,000–$85,000 | Open family room with a media wall, full bathroom, laundry and quality finishes throughout |
| The entertainment build | 1,000–1,300 sq ft | $95,000–$130,000 | Dedicated theatre or media room, custom bar, glass-walled gym and a spa bathroom. The most popular tier we build |
| The luxury lower level | 1,500+ sq ft | $180,000+ | Walkout entrance, designer millwork, wine display, sauna and hotel-grade finishes across the full footprint |
Where the whole market sits: of our completed projects since 2022, 5% came in under $50,000, 16% between $50,000 and $75,000, 34% between $75,000 and $100,000, 26% between $100,000 and $150,000, and 19% above $150,000. One in five recent projects now exceeds $150,000, a tier that barely existed for us before 2022. The largest single project in the dataset was a $373,000 luxury build in Oakville.
In 2019 our median completed project was about $40,000. By 2024 to 2026 it was $103,000, 2.6 times higher. Materials and labour inflation explain part of it. The larger part is scope: Toronto homeowners stopped building plain rec rooms and started building gyms, bars, saunas and full second living spaces, and a growing share are building suites that earn rent. At the pace of the last seven years, waiting one more year to renovate has cost GTA homeowners roughly $9,000.
From the payment schedules of our completed projects, the typical basement takes about eight weeks from construction start to final walkthrough, and most finish within 4 to 11 weeks. Simple Essential builds finish faster; theatres, suites and anything with underpinning take longer, because underpinning is sequenced in sections and inspected as it goes. Toronto permit review adds time before construction starts, which is why we file early and design in parallel. Every quote includes a written timeline backed by our $200-per-day on-time guarantee.
Two 1,000 sq ft Toronto basements can be $40,000 apart before finishes are discussed. Three site conditions drive it: ceiling height, which decides whether underpinning is on the quote; the entrance, because a walkout adds $15,000 to $25,000 and a separate entrance is required for a legal suite; and moisture, because cracks, leaks and old insulation either get fixed before drywall or become your problem after it.
Beyond site conditions, quotes differ in what they leave out. Permits, the subfloor, HVAC changes, electrical panel upgrades and painting are the lines that go missing from a low quote. Our free 18-point quote checklist scores any contractor's quote in a minute, no email required. We built it because we were tired of losing the first round to numbers that were not real and winning the second round when the extras arrived.
Desire Basements is a Financeit partner. You can apply online in minutes and spread the project into monthly payments with transparent terms; for a suite, the rent typically covers the payment with room to spare. Details are on the financing page.
The basement cost calculator uses the same rates as this guide and prices your size, finish level and add-ons live, with no email required. For the exact number, book a free in-home consultation: we measure the space, check the ceiling height and the entrance, and bring a free 3D design with a locked, itemized quote.
Estimate mine in 20 seconds Read the full 2026 cost reportDesire Basements' published rates are $55, $70 and $90 per square foot by finish level, so a 1,000 sq ft basement runs $55,000 to $90,000 before add-ons. Including the bathroom and features most projects add, the median completed GTA project is $103,000, about $100 per square foot all in, with half of projects between $75,000 and $150,000.
In our projects: permits and inspections, metal-stud framing, insulation, moisture-resistant drywall, electrical, HVAC, flooring, a bathroom, painting and full detailing, plus free 3D design and a lifetime workmanship warranty. It is the complete finished space, not a bare shell.
Toronto Building's 2026 schedule sets a minimum fee of $214.79 and charges basement finishing at $6.20 per square metre, or $11.53 per square metre for residential interior alterations ($13.41 where floors are replaced), plus $56.33 for each new residential unit. A 1,000 sq ft (93 m²) basement is roughly $577 to $1,072 in city fees. Desire includes the permit and inspections in every quote.
Under the 2024 Ontario Building Code, a secondary suite in an existing house may have a ceiling as low as 1.95 metres (about 6 feet 5 inches), with 1.85 metres allowed under beams and ducts. Ceilings below that need underpinning ($60,000 to $120,000 full perimeter) or bench footing ($300 to $500 per linear foot).
Purpose-built legal suites in our projects typically land between $75,000 and $110,000 or more, with underpinning extra where the ceiling is too low. GTA suites rent for $1,700 to $2,400 a month in 2026, for a gross payback of roughly 4 to 6 years.
The rates are the same. Toronto projects tend to spend more on site conditions: low ceilings in pre-1960s houses, no side-yard access in semis, older foundations and panels. North York's median completed project is $105,000, in line with Vaughan at $104,000; the differences come from what people build, not where.
About eight weeks of construction for a typical project, with most finishing within 4 to 11 weeks. Permit review comes before that, so we file early. Every Desire timeline is written into the contract and backed by a $200-per-day on-time guarantee.
As living space it is the cheapest square footage you can add to a Toronto house. As an investment, a legal suite earning $1,700 to $2,400 a month pays back its build cost in roughly 4 to 6 years, and the finished space adds resale value that a $373,000 luxury build and a $60,000 family basement both capture in their own way.
Sources: Desire Basements completed-project contract data, 2018–2026, as published in the 2026 GTA Basement Cost Report; City of Toronto Building Permit Fees, schedule effective January 1, 2026; Ontario Building Code 2024, Part 11 requirements for secondary suites in existing houses. Figures represent Desire Basements projects and skew toward custom, higher-finish renovations; entry-level market pricing may be lower.
