Market education
What building costs per square foot in Toronto. 2026.
Every builder gets asked for the number. Here are the honest ones: Toronto market ranges for renovations, additions, and custom homes in 2026, with what each band actually buys and what sits outside it. These are planning figures for the whole market, not Leman quotes. Only a site visit produces a real number.
Before the tables
A rate is a planning band, not a price.
A per square foot rate compresses hundreds of decisions about structure, finishes, and site conditions into a single figure. Two honest builders can quote rates that differ by fifty percent and both be correct, because they are imagining different projects. The ranges below are useful for early planning: place your project in a band honestly, multiply by your real area, and carry the whole range into your budget rather than keeping only the low number. What they cannot do is price your house. That takes a walkthrough, drawings, and a scoped estimate.
Renovations
Whole home renovation ranges.
A general interior renovation keeps the structure largely as it is. A full gut takes the house back to the frame and replaces the systems throughout. The two are different products at different prices.
General interior renovation
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $100 to $160 | Cosmetic scope, finishes refreshed, kitchens and bathrooms updated, no structural change. |
| Mid | $160 to $230 | Selective layout changes, quality finishes throughout, partial mechanical upgrades. |
| Premium | $230 to $300 and up | Extensive layout changes, premium finishes and millwork, lighting design, upgraded systems. |
Full gut renovation
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $350 to $450 | Full systems replacement, quality builder finishes, limited structural reconfiguration. |
| Mid | $450 to $550 | Reconfigured floor plans, structural openings, custom kitchens and bathrooms, quality finishes throughout. |
| Premium | $550 to $700 and up | Architectural design, custom millwork through the house, European finishes, integrated systems, heritage detailing where applicable. |
For orientation: a 2,200 square foot full gut at mid range pricing of $450 to $550 per square foot lands between $990,000 and $1,210,000 before HST and soft costs.
Additions
Additions and third storeys.
Additions price above renovations because every square foot includes foundation or structural work, envelope, and roof, plus the tie in to the existing house. The rate applies to the new area only.
Addition, rear or side
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $400 to $500 | Simple footprint, straightforward foundation, builder finishes. |
| Mid | $500 to $600 | Larger spans, kitchen or bathroom inside the addition, quality finishes. |
| Premium | $600 to $750 and up | Complex structure, extensive glazing, premium finishes, significant tie in work to the existing house. |
Third storey addition
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $450 to $550 | Structure cooperates, simple roof form, builder finishes. |
| Mid | $550 to $650 | Reinforcement of existing structure, new principal suite with bathroom, quality finishes. |
| Premium | $650 to $800 and up | Underpinning or major reinforcement, complex roof, premium suite and finishes. |
Custom homes
New build ranges.
One convention matters before any arithmetic: new build pricing applies to the combined above grade floor area, and the basement is excluded from the multiplier. Always start from the total floor area over all above grade storeys, never from the zoning footprint, which describes the ground the house covers rather than the house you are building.
Custom home, new build
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $400 to $500 | Efficient design, conventional structure, quality builder finishes. |
| Mid | $500 to $650 | Architect designed, custom kitchens and millwork, upgraded envelope and systems. |
| Premium | $650 to $900 and up | Full architectural design, premium European finishes, complex structure and glazing, integrated home systems. |
Worked example: a 4,000 square foot home over two storeys at mid range pricing of $500 to $650 per square foot prices between $2,000,000 and $2,600,000 before land, demolition, municipal development charges, and HST. Basement finishing is priced separately.
Basements
Basement renovation ranges.
Basement renovation
| Level | Per square foot | What that level typically buys |
|---|---|---|
| Low | $65 to $95 | Finishing an already dry, adequate height basement with builder finishes. |
| Mid | $95 to $145 | New bathroom, wet bar or kitchenette, quality finishes, improved insulation and lighting. |
| Premium | $145 to $200 and up | Full design treatment, custom millwork, theatre or gym buildouts, premium finishes. |
Underpinning or benching to gain ceiling height is priced separately and commonly adds between $50,000 and $150,000 depending on foundation type and waterproofing scope. Separate entrance and secondary suite conversions add code requirements that move the range upward.
What moves the number
Five things drive cost.
Structure
Removed walls, new openings, underpinning, and steel all sit in the invisible half of the budget. Two identical looking renovations can differ by hundreds of thousands here.
Finishes
The distance between builder grade and full custom millwork with slab stone is the single widest variable in any range.
Mechanical systems
New HVAC, electrical service upgrades, and plumbing relocation move the number well before anything visible is installed.
Site conditions
Tight streets, shared walls, mature trees, and older foundations never show up in a per square foot rate and always show up in the final cost.
Permits and approvals
Committee of Adjustment variances, heritage review, and ravine or tree protection add fees, professional time, and months of carrying cost.
Read the fine print
What the ranges include, and what they do not.
The figures above are construction cost. The cost of the project is larger, and most renovation budgets fail because the items around the quote were never counted.
HST
Renovation contracts in Ontario carry thirteen percent HST, and published ranges, including these, exclude it. On a $500,000 project that is $65,000. Budget in HST inclusive numbers, because that is the cheque you will actually write.
Contingency
For renovations of older Toronto homes, carry ten to twenty percent of the construction cost, with the higher figure for houses built before 1950. For new construction, five to ten percent is typical. Unspent contingency returns to you at the end.
Design and engineering fees
Architectural design for a significant renovation or custom home typically runs eight to twelve percent of construction cost in the Toronto market, with interior design, structural engineering, and surveys layered on top depending on scope.
Permit fees
City of Toronto building permit fees commonly land between a few thousand dollars on a contained interior renovation and $20,000 or more on a large addition or new build, before any Committee of Adjustment costs.
Land and demolition
Custom home figures exclude land, demolition, and municipal development charges. Temporary housing during a full gut is a five figure line item of its own.
The top of the range
Why premium work costs what it costs.
The ranges widen dramatically at the top, and that is not vanity pricing. Premium construction removes the hiding places: flush millwork, shadow gaps, slab stone with mitred edges, and minimal trim all demand substrate work that is flat and true to a few millimetres, which makes the budget heavier even in the invisible trades. European cabinetry and natural stone are procured months ahead, often from overseas, with no local replacement if anything arrives wrong. And a premium project simply contains more decisions per square metre. What the top of the range buys is time: slower, more careful site work by fewer, better trades, and the absence of compromise at a thousand small junctions.
Common questions
Cost per square foot, answered.
What does a renovation cost per square foot in Toronto in 2026?
A general interior renovation runs roughly $100 to $300 per square foot depending on scope and finish level. A full gut renovation, taken back to the structure with new systems throughout, runs roughly $350 to $700 per square foot and up at the premium end. These are planning bands, not quotes. Only a site visit and a scoped estimate produce a real number for a specific house.
What does a custom home cost per square foot in Toronto?
New custom homes in Toronto run roughly $400 to $900 per square foot and up, applied to the combined above grade floor area. A 4,000 square foot home over two storeys at mid range pricing of $500 to $650 per square foot prices between $2,000,000 and $2,600,000 before land, demolition, development charges, and HST.
Does the per square foot rate include the basement?
No. By convention, new build pricing applies to the combined above grade floor area, and the basement is excluded from the multiplier. Basement finishing is priced separately, roughly $65 to $200 per square foot depending on scope, and underpinning to gain ceiling height commonly adds between $50,000 and $150,000.
Do published ranges include HST?
No. Renovation contracts in Ontario carry thirteen percent HST and most published ranges exclude it. On a $500,000 project that is $65,000. Design fees, permits, contingency, and appliances usually sit outside the construction quote as well, which is why the budget conversation must happen in all in numbers.
Why do two quotes for the same project differ so much?
Usually because they include different things. One quote covers design coordination, allowances, and site protection; the other covers construction labour and little else. Ask for the exclusions list in writing before comparing totals. A quote far below the bottom of a market range deserves more suspicion than one near the top.
Want the numbers with the reasoning attached?
The free Toronto Renovation Cost Guide covers these ranges in depth: where the money goes by trade, the hidden costs, and the questions to ask any builder. Or see the finish levels in person at the showroom.