What a Teardown and Rebuild Costs in the GTA in 2026

A client called last month from Hoggs Hollow with a 1950s bungalow on a 60-foot lot. The house was tired but legal. The question was whether to gut it or start over. We walked the property, pulled the survey, and ran the numbers both ways. The teardown and rebuild came in at $2.1 million for 3,600 square feet of new construction. The gut renovation, keeping the foundation and the roofline, landed at $1.4 million for 2,800 square feet and a ceiling height we would never choose. The client tore it down. This article lays out what a teardown and rebuild costs across Toronto and the GTA in 2026, with the line items that catch people off guard and a worked example you can scale to your own lot.

The all-in number for a GTA teardown and rebuild runs $450 to $650 per square foot of finished interior space in 2026, measured from the day you buy the lot to the day you move in. That figure includes demolition, excavation, foundation, framing, mechanical, finishes, design fees, permits, HST, and a 10 per cent contingency. It does not include the land. At the low end you get a straightforward two-storey house on a flat lot with municipal services at the curb, standard finishes, and no zoning variances. At the high end you get walkout basements, steep grades, custom millwork, stone cladding, or heritage streetscape constraints that limit massing. Most custom home construction projects in North York, Etobicoke, and the inner 905 municipalities land between $500 and $580 per square foot when the client picks finishes we would put in our own houses.

Worked example: a 3,200 square foot house in North York

Take a 40 by 120 foot lot in Willowdale with a post-war bungalow and mature trees along the rear property line. The new house is 3,200 square feet across two storeys and a finished basement: four bedrooms, four bathrooms, a main-floor den, and an open kitchen that runs the width of the house. The zoning allows the footprint and height as of right, so no Committee of Adjustment application. Construction cost at $520 per square foot is $1,664,000. Add demolition and excavation at $45,000, design and engineering at 8 per cent of construction ($133,120), building permit and ESA inspection fees at $8,500, arborist report and tree protection at $6,000, survey at $3,500, and geotechnical at $5,000. Subtotal before tax: $1,865,120. HST at 13 per cent adds $242,466. A 10 per cent contingency on the construction cost adds $166,400. The all-in budget is $2,273,986, or roughly $711 per square foot including tax and contingency. If the client qualifies for the GST/HST new housing rebate under CRA rules, part of the HST comes back, lowering the effective rate, but we budget the full 13 per cent up front and treat any rebate as a credit at closing.

That example assumes the house fits the zoning envelope, the lot drains to the street, and the trees can be protected in place with hoarding. Change any of those and the number moves. A variance application in Toronto adds three to five months and several thousand dollars in fees plus the cost of neighbour consultation and planning drawings. A lot that needs regrading or a sump system adds $15,000 to $40,000. Removing a protected tree requires a permit in Toronto and replacement plantings; we have seen arborist supervision and replanting add $12,000 to $25,000 to a project when the tree inventory is significant.

Demolition, excavation and foundation costs

Demolition of a single-family house in the GTA runs $18,000 to $35,000 depending on size, whether there is a basement to backfill, and how much asbestos abatement the house needs. A small bungalow with no hazardous materials and good truck access lands at the low end. A two-storey house with vermiculite insulation, buried oil tanks, and mature landscaping pushes the high end. Bin permits in Toronto cost a few hundred dollars and take a week; downtown sites sometimes need hoarding permits and parking pads, which add cost and coordination time. Demolition is fast once the permits clear: two to five days on site for most houses.

Excavation and foundation work depends on soil, grade, and how deep the basement goes. A house with a full 2.7-metre basement on stable soil costs $80,000 to $140,000 for excavation, footings, foundation walls, waterproofing, weeping tile, and backfill. Footings are poured first and inspected before the walls go up. Foundation walls in the GTA are typically poured concrete or insulated concrete forms; ICF adds $8 to $15 per square foot of wall but delivers an R-value above code and a quieter house. A walkout basement that daylights to grade at the rear adds forming and grading cost. Sites with high water tables need sump pits and perimeter drainage tied to a storm sewer or drywell, which adds $6,000 to $18,000. The geotechnical report, which costs $3,500 to $8,000 before you break ground, tells you whether you need deeper footings, engineered fill, or dewatering; skipping it is the mistake we are called in to fix when the foundation cracks in year two.

Design fees, permits and HST: the budget lines people forget

Design and engineering typically total 6 to 12 per cent of construction value on a new house. An architect or designer with a Building Code Identification Number prepares the permit drawings; structural changes need an engineer's stamp. HVAC design, landscape drawings for grading and drainage, and arborist reports add to the soft-cost total. On a $1.6 million build, design fees run $96,000 to $192,000. We see clients budget the construction and forget the design, then get surprised when the architectural contract arrives. The design phase also takes time: four to eight months from first meeting to permit-ready drawings, longer if the Committee of Adjustment process is needed for height or setback variances.

Building permit fees in Toronto for a new single-family house are calculated on construction value and land between $6,000 and $12,000 for most projects. Electrical inspection by the Electrical Safety Authority adds another $800 to $1,500. Gas inspection by the TSSA is separate. Plumbing is covered under the building permit. The Building Code sets a 10-business-day review deadline for complete house applications, but incomplete submissions and zoning questions stop the clock, which is why most delays happen before the file is deemed complete. We submit with every required drawing, calculation, and energy compliance form the first time, because resubmissions cost weeks.

HST at 13 per cent applies to the full construction contract in Ontario. On a $1.6 million build, that is $208,000. The GST/HST new housing rebate can return part of the tax if the house is your principal residence and the purchase price falls below CRA thresholds, but the rules are specific and the rebate is not automatic. Budget the full 13 per cent and confirm eligibility with an accountant before you count on the rebate. Renovations that gut at least 90 per cent of the interior can also qualify as a substantial renovation under CRA rules, but a teardown and rebuild is simpler: it is new construction, it is enrolled with Tarion, and the rebate path is clear.

What moves the number up: grade, trees, services, finishes

Four things push the per-square-foot cost above $550: grade, trees, services at the lot line, and finish selections. A sloping lot that needs retaining walls or tiered foundations can add $40,000 to $120,000 in forming, engineering, and drainage work. Sites with significant trees require protection hoarding during construction, arborist supervision, and design adjustments to keep equipment outside the critical root zone; on some Rosedale and Bridle Path estate projects we have seen tree protection and replanting add $30,000 to $60,000. If the municipal water, sanitary, or storm connection is not at the curb, extending services across the boulevard or coordinating a new lateral adds $8,000 to $25,000 and weeks to the schedule while you wait for the utility to trench.

Finishes are where the range opens wide. A house with engineered hardwood, quartz counters, porcelain tile, and painted millwork lands near $500 per square foot. Swap in wide-plank white oak, book-matched stone slabs, custom cabinetry, imported tile, and a stone or brick facade, and the number climbs past $600. We give clients a finish allowance schedule at contract with line items for flooring, counters, tile, plumbing fixtures, lighting, and appliances. The allowance is based on mid-range selections; upgrades are priced as change orders with no markup beyond our standard overhead and fee. Clients who want to see the trade-offs pick three finishes at different price points for each category and we show the delta in dollars and in the overall budget position.

Contingency: how much to set aside and why

We budget a 10 per cent contingency on new construction and hold it in reserve for conditions we cannot see until the site is open or for changes the client makes after drawings are fixed. On a $1.6 million build, that is $160,000. It sounds like a lot, but it is the difference between a project that finishes on budget and one that stalls in month eleven when the account runs dry. Contingency covers ledge rock that shows up during excavation, understrength soil that needs engineered fill, utility conflicts that force a design adjustment, or a client decision to add a powder room or upgrade the primary ensuite after framing is up.

Post-war houses on flat lots rarely use the full contingency; we typically return 4 to 7 per cent at the end. Houses on ravine lots, steep grades, or sites with mature tree cover use more of it, and sometimes all of it. The contingency is not a slush fund and it is not profit; it is a line item in the budget, tracked in the monthly cost report, and reconciled at substantial completion. Clients who skip contingency end up borrowing against it anyway, either from a line of credit or by cutting scope in the final months, and cutting scope once the house is framed is the expensive way to save money. We would rather build the budget honestly, track it weekly, and return what we do not use than pretend the number is lower and renegotiate halfway through. A GTA teardown and rebuild takes 12 to 18 months of construction after 6 to 12 months of design and permitting; the last thing you want in month fourteen is a fight over who pays for the thing nobody saw coming.