How much does it cost to fix a foundation crack in Toronto?

For a crack that only leaks, five Ontario companies publish a per-crack injection price between $300 and $1,000: Nusite Group says $300 to $800, Gamcon $400 to $800, Toronto Basement Underpinning $500 to $900, and both DryShield and Concrete Crack Repair Pros $750 to $1,000. A crack that needs the wall bonded structurally is injected with epoxy at $700 to $1,500. Add 13 per cent HST to all of it.

What is the difference between polyurethane and epoxy injection?

Polyurethane stays flexible and is used to stop water. DryShield puts it plainly: polyurethane seals active leaks, epoxy restores structural strength. A Toronto foundation moves a little every freeze-thaw season, so a flexible seal in a stable crack survives that movement, while a rigid epoxy bond in the same crack can simply crack again beside the old line. Epoxy is the right answer when the wall needs to be one piece again, which is a structural judgement, not a leak one.

Is a horizontal crack more serious than a vertical one?

Yes, and it changes what you are buying. A vertical or diagonal crack in a poured wall is usually shrinkage or settlement and is an injection job. A horizontal line across the wall is lateral pressure from the soil pushing in, and Leaquida Waterproofing puts that repair at $7,500 to $15,000 and up, because it needs carbon fibre straps or anchors rather than a seal. Toronto Basement Underpinning prices straps at $3,000 to $8,000 and anchors at $5,000 to $12,000. A horizontal crack is worth an engineer's opinion before anyone quotes.

What are the little round holes in my foundation wall?

Tie-rod holes, left by the forms the wall was poured in, and they leak. Both DryShield and Concrete Crack Repair Pros price sealing at $75 to $150 per hole, so a row of six is $450 to $900 and it is done on the same visit as a crack. If a quote covers the crack but leaves the tie rods, the wall will still be wet.

Why is one company quoting $800 and another $3,000 for the same crack?

Usually because they are quoting different scopes. A per-crack injection price covers drilling ports, injecting and sealing the face. Leaquida Waterproofing publishes $1,500 to $3,000 for one accessible seam and says what is inside it: prep, routing, ports, injection, surface seal and a small finish patch. RCC Waterproofing publishes $50 to $650 for internal crack repair using hydraulic cement or epoxy, which is a cheaper method again. Ask each company to write down which of those three it is quoting.

Can the crack be fixed from outside instead?

It can, and sometimes it must. Gamcon prices exterior repair, which means excavating to expose the foundation and waterproofing the area, at $100 to $300 per linear foot depending on depth and access. Leaquida says exterior excavation with membrane and new drainage typically starts around $15,000. That is the route when the real problem is failed drainage against the wall rather than the crack itself, because sealing the inside of a wall that is sitting in water buys you time rather than a fix.

What does foundation crack repair cost in Toronto?

Last updated: August 26, 2026By Below-Grade Records Desk

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A crack that only leaks is a $300 to $1,000 job across five published Ontario price lists. A crack the wall has moved along is $700 to $1,500 in structural epoxy. A wall that is bowing inward is not a crack repair at all, and starts at $3,000. Tell the calculator which one you have and it prices the visit, tie-rod holes included.

Price the repair

What is the wall actually doing?

A crack that leaks when it rainsVertical or diagonal, wet after a storm, no movement in the wall. Sealed with polyurethane, which stays flexible through the freeze-thaw season.A crack that needs the wall bonded back togetherWider at one end, offset either side, or an engineer has called it structural. Injected with epoxy, which sets rigid and restores strength.The wall is bowing inwardA horizontal line across the wall, or a visible lean. This is no longer a crack repair. The wall is reinforced with carbon fibre straps or pulled back with anchors.

How many cracks?

Count the separate cracks a contractor would have to set up at. Two cracks a metre apart are still two set-ups.

crack

Any tie-rod holes to seal at the same time?

The regular row of small round holes across a poured wall, left by the forms. They leak, and they are sealed on the same visit for far less than a crack.

holes

What this repair costs in the GTA

$339–$1,130

with 13% HST. Before tax that is $300–$1,000.

1 crack, injected$300–$1,000 per crackDryShield; Concrete Crack Repair Pros; Toronto Basement Underpinning; Gamcon; Nusite Group: $300–$1,000
HST at 13%Government of Ontario: $39–$130

Two other published scopes for the same wall: a full interior programme including the finish patch, and a cement patch rather than an injection.

$1,500–$3,000 per seam: interior injection programme for one accessible leaking seam, including prep, ports, surface seal and a small finish patch (Leaquida Waterproofing)
$50–$650 per crack: internal crack repair with hydraulic cement or epoxy injection, priced by crack size (RCC Waterproofing)

Ranges are the published per-crack prices of named Ontario companies, widened where they disagree and never averaged. A finished basement costs more than an exposed wall on the same crack, because the finish comes off first; no source publishes that difference as a figure, so none is shown here.

Method

How is this estimate built?

Seven Ontario waterproofing and foundation companies publish a price for this work, and WaterproofingIndex read all seven in August 2026. The calculator takes the rows that match the repair you picked, uses the lowest low and the highest high across them, multiplies by how many cracks there are, adds tie-rod holes and adds 13 per cent HST.

One row is deliberately kept out of that widening. RCC Waterproofing publishes $50 to $650 for internal crack repair, but its own sentence says that is hydraulic cement or epoxy injection priced by crack size, which is a cheaper and different job from the port-and-inject repair the other companies price. Folding it in would have pulled the published low from $300 down to $50, a figure nobody quotes for an injected crack. It is shown beside the answer instead, named, so you can see the cheaper method exists without it distorting the range.

What the calculator cannot know: whether the crack is actually stable. That is the one judgement that decides between a $500 seal and a $12,000 wall anchor system, and it is made by someone looking at the wall, ideally with an engineer's report behind them if the crack runs horizontally.

Questions

How to read the crack before you get a quote

Which way does it run? Vertical and diagonal cracks are usually shrinkage or settlement. Horizontal ones are soil pressure, and they are the expensive kind.
Is it offset? Run a finger across it. If one side sits proud of the other, the wall has moved, and that is a structural conversation rather than a sealing one.
Is it growing? Pencil the ends and the date on the wall. A crack that has not moved in six months is a different problem from one that has.
Is the wall poured concrete or block? Injection is a poured-concrete repair. A block wall leaks through the joints and the cores, and is a different job entirely.
What is happening outside that spot? A downspout discharging at the wall, or ground sloping back toward the house, is often the reason one crack leaks and the other nine do not.

Frequently asked questions

How much does it cost to fix a foundation crack in Toronto?: For a crack that only leaks, five Ontario companies publish a per-crack injection price between $300 and $1,000: Nusite Group says $300 to $800, Gamcon $400 to $800, Toronto Basement Underpinning $500 to $900, and both DryShield and Concrete Crack Repair Pros $750 to $1,000. A crack that needs the wall bonded structurally is injected with epoxy at $700 to $1,500. Add 13 per cent HST to all of it.
What is the difference between polyurethane and epoxy injection?: Polyurethane stays flexible and is used to stop water. DryShield puts it plainly: polyurethane seals active leaks, epoxy restores structural strength. A Toronto foundation moves a little every freeze-thaw season, so a flexible seal in a stable crack survives that movement, while a rigid epoxy bond in the same crack can simply crack again beside the old line. Epoxy is the right answer when the wall needs to be one piece again, which is a structural judgement, not a leak one.
Is a horizontal crack more serious than a vertical one?: Yes, and it changes what you are buying. A vertical or diagonal crack in a poured wall is usually shrinkage or settlement and is an injection job. A horizontal line across the wall is lateral pressure from the soil pushing in, and Leaquida Waterproofing puts that repair at $7,500 to $15,000 and up, because it needs carbon fibre straps or anchors rather than a seal. Toronto Basement Underpinning prices straps at $3,000 to $8,000 and anchors at $5,000 to $12,000. A horizontal crack is worth an engineer's opinion before anyone quotes.
What are the little round holes in my foundation wall?: Tie-rod holes, left by the forms the wall was poured in, and they leak. Both DryShield and Concrete Crack Repair Pros price sealing at $75 to $150 per hole, so a row of six is $450 to $900 and it is done on the same visit as a crack. If a quote covers the crack but leaves the tie rods, the wall will still be wet.
Why is one company quoting $800 and another $3,000 for the same crack?: Usually because they are quoting different scopes. A per-crack injection price covers drilling ports, injecting and sealing the face. Leaquida Waterproofing publishes $1,500 to $3,000 for one accessible seam and says what is inside it: prep, routing, ports, injection, surface seal and a small finish patch. RCC Waterproofing publishes $50 to $650 for internal crack repair using hydraulic cement or epoxy, which is a cheaper method again. Ask each company to write down which of those three it is quoting.
Can the crack be fixed from outside instead?: It can, and sometimes it must. Gamcon prices exterior repair, which means excavating to expose the foundation and waterproofing the area, at $100 to $300 per linear foot depending on depth and access. Leaquida says exterior excavation with membrane and new drainage typically starts around $15,000. That is the route when the real problem is failed drainage against the wall rather than the crack itself, because sealing the inside of a wall that is sitting in water buys you time rather than a fix.

Sources

Where these numbers came from

Seven Ontario foundation and waterproofing price lists, each read on its own page in August 2026 and stored with the sentence carrying the figure. Canadian dollars, before HST.

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