Ranked 1Willowdale · 3 locations
Also Concrete Repair & Leveling +1
Mon to Sun, open 24 hours
- Says it is licensed
- Says it is insured
Best Foundation & Underpinning Contractors in Toronto & the GTA
Key facts
- 144
- companies
- 4.86★
- average, 10,466 reviews
- 85%
- at 4.8★ or better
- $350–$480
- per linear foot typical, see the sources
Updated from public Google data.
Top 15 of 144, ranked by rating, reviews and the details on the record
Never paid placement. How the order is set
- Ranked 1
Ranked 2Aquamaster Basement Waterproofing Hamilton
82/100 ConcreteFinder Score
145 Google reviews, rated 5.0 out of 5
Burlington · 5 locations
Mon to Sun, 8 a.m. to 8 p.m.
- Says it is licensed
- Says it is insured
Ranked 3Royal Work Basement Waterproofing Toronto
81/100 ConcreteFinder Score
448 Google reviews, rated 5.0 out of 5
Harbourfront · 3 locations
Also Concrete Contractors
Mon to Sun, 7 a.m. to 11 p.m.
- Says it is licensed
- Says it is insured
Ranked 4Oakville
Also Concrete Repair & Leveling
Mon to Sat, 8 a.m. to 8 p.m.
- Says it is licensed
- Says it is insured
Ranked 5The Kingsway
Also Concrete Contractors
Mon to Sun, 7 a.m. to 8 p.m.
- Says it is licensed
- Says it is insured
Ranked 6Willowdale
Also Concrete Driveways +1
Mon to Fri, 8 a.m. to 5 p.m.
- Says it is insured
- Says it carries WSIB coverage
Ranked 7Service area not recorded · 2 locations
Hours not posted
- Says it is licensed
- Says it is insured
Ranked 8Agincourt
Also Concrete Contractors
Hours not posted
- Says it is licensed
- Says it is insured
Ranked 9The Beaches
Mon to Sat, 7 a.m. to 9 p.m.
- Says about 25 years going
Ranked 10Burlington
Also Concrete Contractors +1
Mon to Sun, open 24 hours
- Says it is insured
- Says about 10 years going
- WNo photo on fileRanked 11
Islington-City Centre West
Mon to Sun, 8 a.m. to 8 p.m.
- Says it is licensed
- Says about 15 years going
Ranked 12Yonge & St. Clair
Mon to Fri, 9 a.m. to 5 p.m.
- Says it is insured
- Says about 25 years going
Ranked 13Groundworks Foundation Repair Toronto
74/100 ConcreteFinder Score
1,656 Google reviews, rated 4.9 out of 5
Agincourt · 2 locations
Mon to Sun, 7 a.m. to 11 p.m.
- Says about 30 years going
Ranked 14GAMCON Helical Piles & Waterproofing
74/100 ConcreteFinder Score
24 Google reviews, rated 5.0 out of 5
Etobicoke
Mon to Sun, 6 a.m. to 6 p.m.
- Says it is licensed
- Says it is insured
Ranked 15Brampton · 3 locations
Also Concrete Contractors +1
Mon to Sun, open 24 hours
- Says it is licensed
- Says it is insured
What does foundation and underpinning work run per square foot in Toronto?
According to Strong Basements, basement underpinning - structural work only runs $350–$480 per linear foot in the GTA, while basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) runs $80–$100 per sq ft (Strong Basements (low end: Nusite Group)). Add 13% HST to any quote. The table below breaks down 8 line items, each with its own named source.
| Item | Typical range | Unit | Source |
|---|---|---|---|
| Basement underpinning - structural work onlyStrong Basements' Toronto average for the structural work alone. Elsewhere on the same page they put the market rate for a professionally managed, fully insured project at $350 to over $600 per linear foot, with crawlspaces often at the higher end. Cost varies with soil conditions, depth of lowering, the underpinning method (non-shrink, overpour, L-shape, bench footing, engineered bench) and structural requirements such as load posts and beams. The flat $650 ceiling this guide used to show is not on their page. | $350–$480 | per linear foot | Strong Basements |
| Basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab)Strong Basements' all-in figure for a basement-lowering project, the same sentence that carries their per-linear-foot rate. Their worked example is a 600 sq ft basement lowered by 2 feet at $62,900 all in. The $50 floor and $105 ceiling this guide used to show are not on their page. | $80–$100 | per sq ft | Strong Basements (low end: Nusite Group) |
| Underpinning a 1,000 sq ft basement lowered by 2 feet (total project)Nusite's worked example at their own $50 to $80 per square foot underpinning rate, over a four to ten week timeline. Permits, engineering, waterproofing, plumbing and finishing are all priced on top. | $50,000–$80,000 | per project | Nusite Group (Toronto underpinning contractor) |
| Bench footing - priced by floor areaBench footing keeps the existing footing and steps the new floor in from the wall, so it is cheaper than underpinning but gives up perimeter floor area. Nusite's timeline is four to eight weeks. | $35–$60 | per sq ft | Nusite Group |
| Foundation crack repair - polyurethane injection (leaking crack)DryShield's polyurethane tier, for stopping active leaks with a flexible seal that tolerates seasonal movement. HST and finishing work are not included unless quoted. The $500 floor this guide used to show is not on their page. | $750–$1,000 | per crack | DryShield Basement Waterproofing (Toronto/GTA, 2026) |
| Foundation crack repair - structural epoxy injectionDryShield's epoxy tier, for bonding structural cracks where strength restoration is the goal. Same floor as polyurethane, higher ceiling. Neither the $800 floor nor the $2,500 ceiling this guide used to show is on their page. | $750–$1,500 | per crack | DryShield Basement Waterproofing (Toronto/GTA, 2026) |
| Exterior waterproofing, as part of a basement-lowering projectNusite prices this only where exterior work is needed; an interior waterproofing system on the same job is $5,000 to $8,000, and the waterproofing line as a whole is $5,000 to $15,000. | $10,000–$15,000 | per project | Nusite Group (Toronto underpinning contractor) |
| Structural engineering drawings for underpinning permitStrong Basements' Toronto figure for the engineer to design the underpinning around the home's structure and soil and produce a drawing set for the permit application and construction. Some design-build firms fold it into a project package instead of billing it separately. Neither the $1,500 floor nor the $6,000 ceiling this guide used to show is on their page. | $2,000–$5,000 | per project | Strong Basements (Toronto) |
How does ConcreteFinder rank foundation contractors?
ConcreteFinder scores every company out of 100. Reviews are 45 of that, weighing review volume alongside the star rating so consistent, high-volume reputations rise to the top. The remaining 47 count what a company states on its own website, each line quoted from the page it was read off, and the details on the record: a website that answers, photographs, a phone, posted hours. Never paid placement.
GTA-wide, 85% of the rated foundation contractors already sit at 4.8★ or better, so read a two-place gap on this list as a real one. Placement cannot be bought. Read how the order is calculated.
Last updated: By ConcreteFinder Research Team
Questions to ask your contractor
- Will you provide stamped engineering drawings and pull the building permit? Engineering and permit cost benchmarks
- Is this underpinning or bench footing, and why is that right for my house?
- How do you protect the existing structure and the neighbours during excavation?
- What waterproofing and drainage go in while the foundation is open?
- What is the inspection schedule, and who books the city inspections?
Frequently asked questions
What is the going rate for foundation and underpinning work across Toronto and the GTA?
According to Strong Basements, basement underpinning - structural work only runs $350–$480 per linear foot, and basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) runs $80–$100 per sq ft (Strong Basements (low end: Nusite Group)). Quotes are pre-tax, so add 13% HST on top. The foundations & underpinning cost guide here breaks the job into line items and names the source behind each one.
How do I tell a solid GTA foundation contractor from a cheap pour?
Compare at least three written, itemized quotes rather than defaulting to the cheapest. ConcreteFinder ranks 144 foundation contractors at an average 4.86★ Google rating; the middle of that field sits on 33 reviews. Start with the shortlist above, then ask each crew for the address of a pour it finished at least two winters ago and go and look at the joints.
Which months are the right ones to schedule foundation and underpinning work in Toronto?
Foundation and underpinning work runs year-round in the GTA, since it is interior or structural work that does not depend on the outdoor pouring season. Book a few weeks ahead in busy periods, but you are not locked to summer.
Do I need a permit, and is HST included in foundation and underpinning work quotes?
Add 13% HST to any quote, since concrete work is taxable in Ontario and most posted prices exclude it. Permit needs depend on scope: a like-for-like driveway or slab repour rarely needs one, but widening a driveway, altering the curb cut or boulevard, and any structural foundation or underpinning work require municipal approval and often an engineer, which a reputable contractor arranges. See ConcreteFinder's foundations & underpinning cost guide for the Ontario rules.
Will a contractor move up this list by paying ConcreteFinder?
No, and there is no product to buy that would change it. The order is a Google rating pulled toward the field average by review count, plus small boosts for a website, a phone number and photographs on file. Money is not one of the inputs. GTA-wide, 85% of the rated foundation contractors already sit at 4.8★ or better. In a field that tight, a couple of positions is a real difference, not noise. Full details are on our methodology page.
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