How Much Does Foundation Repair Cost in Toronto in 2026?

This range rests on 8 independent named sources, across 15 priced lines. Every figure was re-read in August 2026 in the source that publishes it, and any figure whose source could no longer be read was removed rather than carried forward. Where two sources disagree, both rows are shown as their own sources published them; nothing is averaged and no range is widened to cover a gap.

Access, depth and scope move foundation repair pricing more than anything else in Toronto. Each factor below is one reason two quotes for what sounds like the same job can be thousands of dollars apart.

• Whether the crack can be injected from inside or has to be excavated from outside: interior injection runs $750 to $1,500 per crack (DryShield) versus roughly $150 to $250+ per linear foot with excavation
• Crack type: polyurethane leak sealing prices below structural epoxy on most GTA price lists, and epoxy is used where the crack needs a rigid structural bond
• Whether the wall is moving: a leaking vertical seam with no movement is the cheap case; a horizontal crack or a bow moves you into straps, anchors or stitching, which Leaquida prices at $7,500 to $15,000+
• Foundation material: poured concrete cracks are injectable, while badly deteriorated block walls tend toward rebuild territory at $15,000 to $40,000 per wall (Toronto Basement Underpinning)
• How many cracks: DryShield and Concrete Crack Repair Pros both note volume pricing, because the first crack carries the visit and setup and same-day extra cracks price lower
• Depth of the foundation and access for excavation, which is what widens DryShield's exterior total from $5,000 to $20,000+ on the same type of repair
• Whether the basement is finished, since interior injection may require opening and later restoring finished walls
• Condition of the surface before parging: GTA Brickworks notes that failed multi-layer parging or crumbling block underneath adds substantial preparation time
• Whether an engineer is involved: an assessment adds $500 to $1,500 (Toronto Basement Underpinning), and a stamped repair plan costs more than a plain report

Ontario adds 13% HST to every figure on this page, Toronto requires permits for most below-grade structural work, and both change what you actually pay. These are the local rules and subsidies that a national price guide leaves out.

• HST: foundation repair is a fully taxable construction service in Ontario, so add 13% HST to quoted prices. DryShield states plainly that its published ranges exclude HST, and most GTA contractor price pages do the same.
• Foundation repair itself is not subsidized in Toronto. DryShield states the repair is generally not directly subsidized, but flood-protection components installed alongside it, a sump pump or a backwater valve, may qualify for municipal rebates in Toronto, Peel and Halton.
• City of Toronto Basement Flooding Protection Subsidy: the City offers up to 80 per cent of the invoiced cost to a maximum of $1,600 per device, maximum two devices, for eligible flood-protection devices, and up to 80 per cent to a maximum of $400 for certain other eligible items including labour, materials and taxes. Confirm current eligibility with the City before counting on it.
• Get an engineer before you buy a structural repair. Toronto Basement Underpinning recommends a structural engineer assessment at $500 to $1,500 for anything beyond crack injection, on the grounds that without it you may get quotes for the wrong repair type or inflated quotes for unnecessary work.
• Structural foundation work in Toronto generally requires a building permit. Confirm permit requirements with Toronto Building for your specific scope, since crack injection and full structural work are treated differently.
• GTA freeze-thaw cycles and clay soils are the local driver behind both cracking and parging failure, which is why parging and crack sealing recur as maintenance items on older Toronto housing stock rather than one-time fixes.
• Exterior excavation work is seasonal in the GTA. Interior injection can be done year round, which is another reason interior repair dominates winter bookings.

Bundling work into one excavation, reusing what is already there, and getting the sequence right are what actually cut a foundation repair bill in the GTA. Each lever below is tied to a figure in the table above.

• Fix the crack early. DryShield's own argument is that a $750 to $1,500 injection is far cheaper than a later structural repair, and the structural repairs on this page start at $3,000 for carbon fibre straps and run to $40,000 for a rebuilt wall.
• Bundle cracks into one visit. DryShield and Concrete Crack Repair Pros both apply volume pricing for multiple cracks because the first crack carries the visit and setup cost.
• Ask whether the crack can be sealed from inside before agreeing to excavation. Interior injection at $750 to $1,500 per crack versus exterior excavation at $150 to $250+ per linear foot is the single biggest saving available on a leaking crack.
• Spend $500 to $1,500 on an engineer assessment before buying a big structural repair. Toronto Basement Underpinning's point is that the report can stop you buying the wrong repair entirely, which is worth far more than the fee.
• Get more than one quote on bowing walls specifically. Published prices for the same carbon fibre job range from $2,000 to $8,000 per wall across Foundation Fix and Toronto Basement Underpinning.
• For parging, ask about spot repair before full re-parging. Alasya prices a spot repair at $300 to $900 and one full side at $800 to $2,000, versus $3,500 to $7,000 for a complete perimeter.
• Skip the acrylic finish coat if budget is tight. Alasya lists it as an optional add of roughly $3 to $5 per sq ft, separate from the base parging price.
• If you are installing a sump pump or backwater valve as part of the work, apply for the City of Toronto Basement Flooding Protection Subsidy, which covers up to 80 per cent of eligible invoiced cost to a maximum of $1,600 per device for up to two devices.
• Never accept a phone quote for structural work. Toronto Basement Underpinning warns that a contractor quoting a significant foundation repair without a site visit is guessing, and that guess usually gets revised upward.

Every price on this page was re-read in the page that publishes it, and the sentence carrying it was recorded so the figure can be checked rather than trusted. Where two Canadian sources disagree, WaterproofingIndex shows both rather than averaging them into a number neither company quoted.

• How to read the typical column: none of these Canadian sources publishes a single most-common price, only a range. So typical shows the low end of that source's own published range, meaning the entry point for a straightforward job, not an average. The one exception is the engineer row, where $1,000 is the printed boundary between a standard residential assessment and a complex one.
• Crack injection prices vary widely by contractor even within the GTA, so shop the number. DryShield publishes $750 to $1,500 per crack overall and $750 to $1,000 for polyurethane. Concrete Crack Repair Pros publishes $850 to $1,500 for structural epoxy. Toronto Basement Underpinning publishes a cheaper $500 to $900 for polyurethane and $700 to $1,200 for epoxy, and separately says a single crack runs $500 to $1,200. Leaquida publishes $1,500 to $3,000 for a full interior injection program on one accessible seam. Foundation Fix (Southern Ontario) publishes $500 to $2,000 per crack. Every one of those is a real published GTA or Ontario number, so a $600 quote and a $2,500 quote can both be legitimate for the same crack depending on scope, access and warranty.
• Interior injection versus exterior excavation is the biggest fork in the price. DryShield puts interior injection at $750 to $1,500 per crack, but external crack repair reached by digging down the outside of the wall at roughly $150 to $250+ per linear foot, totalling $5,000 to $20,000+. Leaquida says excavation with membrane and new drainage typically starts around $15,000. Gamcon quotes $100 to $300 per linear foot for exterior repairs to stop a leak. Interior work is the cheaper route whenever the crack can be sealed from inside.
• Bowing wall pricing conflicts between sources and the row ranges above reflect that. Toronto Basement Underpinning publishes $3,000 to $8,000 for carbon fibre straps and $5,000 to $12,000 for wall anchors. Foundation Fix publishes $2,000 to $5,000 per wall or $500 to $1,000 per strap. Expect a wide spread and get more than one quote.
• Straps stop movement, they do not straighten a wall. Toronto Basement Underpinning notes anchors, unlike straps, can be gradually tightened over time to recover some of the existing bow. That difference is why anchors price higher.
• Parging pricing also conflicts. Alasya Construction publishes $6 to $12 per sq ft installed for two-coat work and $3,500 to $7,000 for a full detached re-parging. GTA Brickworks publishes $3 to $8 per sq ft and $900 to $3,500 for a standard detached home, rising to $2,000 to $4,500 for detached homes with three or four exposed sides. Small-area parging is priced by the job instead: Alasya publishes $300 to $900 for a spot repair and $800 to $2,000 for one full side of a foundation.
• Alasya adds that an acrylic finish coat costs roughly $3 to $5 per sq ft on top of the parging, and that crack repair done before parging is $200 to $600 per crack.
• Engineer report costs differ by source: Toronto Basement Underpinning publishes $500 to $1,500 and Foundation Fix publishes $800 to $2,500 for an assessment and report. Toronto Basement Underpinning also warns that any contractor who quotes a significant foundation repair over the phone without a site visit is guessing.
• Underpinning is a different job with its own pricing and is covered in a separate guide. It is mentioned here only because sources price it alongside foundation repair: DryShield publishes $500 to $800 per foot for underpinning, piers or wall reinforcement, and Toronto Basement Underpinning publishes $50,000 to $120,000+ for full underpinning of a typical Toronto semi or detached home.
• All contractor figures on this page are published in Canadian dollars for the Ontario and GTA market. DryShield states its ranges are general Ontario market ranges for 2026 excluding HST. No US cost guides were used.

Sources

• DryShield - Crack Injection Cost (Toronto foundation repair pricing)
• DryShield - Foundation Repair Cost & Pricing Guide (2026 Ontario ranges, excl. HST)
• Concrete Crack Repair Pros - Crack Injection Cost in Toronto 2026, Real Ranges
• Leaquida Waterproofing - Foundation Crack Repair Cost in Toronto
• Toronto Basement Underpinning - Foundation Repair Cost Ontario 2026, Complete Price Guide
• Foundation Fix - The Ultimate Guide to Foundation Repair Costs in Southern Ontario
• Gamcon - How Much Does Foundation Repair Cost in Toronto?
• Alasya Construction - Parging Cost Toronto: What to Budget in 2026
• GTA Masonry / GTA Brickworks - How Much Does Parging Cost in Toronto?
• City of Toronto - Basement Flooding Protection Subsidy Program

WaterproofingIndex tracks 83 foundation repair contractors across the Greater Toronto Area, rated 4.84★ on average. The three below rank highest on our review-weighted score, based on WaterproofingIndex's analysis of 83 GTA businesses, August 2026.

• 1

  Dryshield Basement Waterproofing Toronto

  4.9(286 Google reviews)

  93/100 WaterproofingIndex Score

  12.3 km from Willowdale centre

  WillowdaleBasement Waterproofing

  • Says it is licensed
  • Says it is insured

  Its own website describes below-grade water work

  Request a quote
• 2

  Crackmasters Basement Waterproofing Systems

  5.0(64 Google reviews)

  89/100 WaterproofingIndex Score

  No street address published

  Basement Waterproofing

  • Says it is licensed
  • Says it is insured

  Its own website describes below-grade water work

  Request a quote
• 3

  Otto's Masonry

  4.9(88 Google reviews)

  83/100 WaterproofingIndex Score

  0.8 km from Leaside centre

  LeasideFoundation Repair

  • Says it is licensed
  • Says it is insured

  Its own website describes below-grade water work

  Request a quote

Every picture below was published by the company under it, on its own business listing, and WaterproofingIndex did not take any of them. Each of these companies describes below-grade water work on its own website, which is the same relevance check every profile on this site publishes. They are still not all the same kind of picture: some show a floor opened up mid-job, some show a truck or an office with the company's sign on it. None has been checked against a job in your area, and none is evidence of a price. They are here because a company that publishes its own excavation is showing you something a quote cannot.

The table above is the market. These calculators put your own basement into it, and they add the HST and any City of Toronto subsidy that applies.

• Price the repair by what the wall is doing
• Work out where the water is actually getting in

These are the words that appear on a foundation repair quote without being explained. Each one changes what you are buying.

crack injection

Filling a foundation crack under pressure through ports drilled along it, with polyurethane where the aim is to stop a leak or epoxy where the aim is to bond the concrete back together.

parging

A thin cement coat applied to the exposed face of a foundation wall above grade. It is protective and cosmetic, not waterproofing, and it is priced by the square foot or by the side of the house.

underpinning

Deepening an existing foundation by excavating and pouring new footings in sequenced sections beneath the old ones. It is how a basement gains height without moving the house, and it is structural work that needs engineered drawings and a permit.

bench footing

The cheaper alternative to underpinning: the floor is lowered but a concrete bench is left running along the base of the existing wall so the footing is never undermined. It costs less and takes floor width instead.

backwater valve

A one-way valve fitted into the sanitary or storm lateral so that a surcharged city sewer cannot push sewage back up into the basement. It closes under reverse flow and opens again once the main clears.

Most of the money on a foundation repair quote is decided before any number is written down, by which of two methods the company is proposing. These side by side pages are built from the same price rows as the table above.

• Crack injection vs excavationFoundation Crack Injection vs Exterior Excavation Repair in Toronto

Below-grade jobs overlap, and the wrong guide gives you the wrong budget. These three are the ones most often quoted alongside foundation repair.

• Foundation Crack Injection costs in TorontoOne injected crack runs $300 to $1,500, depending on which Toronto contractor publishes the price.
• Underpinning costs in TorontoUnderpinning runs $50 to $80 per square foot of basement floor; bench footing runs $35 to $60.
• Basement Waterproofing costs in TorontoInterior drainage runs $50 to $180 per linear foot; exterior excavation and membrane runs $150 to $475.