1Foundation & Underpinning Contractors in Toronto & the GTA
Last updated: By ConcreteFinder Research Team
ConcreteFinder tracks 155 foundation contractors working across Toronto and the GTA, with a median 4.86★ Google rating over 10,721 reviews. Installed foundation and underpinning work typically runs $350–$650 per linear foot according to Strong Basements. ConcreteFinder ranks every company by verified review data and verification checks, never paid placement, so the shortlist below reflects real reputation.
Where do you need foundation and underpinning work in the GTA?
Choose your neighbourhood or city to see the ranked shortlist and local pricing for that area. ConcreteFinder publishes a dedicated foundation and underpinning work ranking for 15 GTA areas, each drawn from that area's own review data.
Which foundation contractors rank highest across the GTA?
These are the top 15 foundation contractors in the Greater Toronto Area, ranked by ConcreteFinder's Bayesian rating method, which weighs review volume alongside star rating so consistent, high-volume reputations rise to the top.
- 1
2Verified listingTop ratedWaterproofing PD Basement Waterproofing Mississauga
Islington-City Centre WestFoundations & UnderpinningWaterproofing PD is a basement waterproofing company specializing in fixing wet and leaky basements. We offer a lifetime warranty.
3Verified listingTop ratedAquamaster Basement Waterproofing Hamilton
BurlingtonFoundations & UnderpinningAquamaster provides Foundation & Basement Waterproofing Hamilton. Say goodbye to wet, damp, or leaky basements. Contact us today and get 10% off!
4Verified listingTop ratedAct Fast Waterproofing Corp.
The BeachesFoundations & UnderpinningToronto basement waterproofing experts. We dry basements and crawlspaces with internal/external systems. Price Match. 25-year transferable warranty.
5Verified listingTop ratedDirect Waterproofing
Yonge & St. ClairFoundations & UnderpinningDirect Waterproofing offers expert basement waterproofing services in Toronto. Keep your basement dry and your home safe from leaks
6Verified listingTop ratedDirect Basement Waterproofing
Islington-City Centre WestFoundations & UnderpinningDirect Waterproofing offers quality Basement Waterproofing Mississauga. Fix your wet, damp, or leaky basement today. Free on-site estimate!
7Verified listingTop ratedVMB Group - Basement Lowering Underpinning
Islington-City Centre WestFoundations & UnderpinningVMB is leading company in Toronto basement underpinnings and excavation to increase height. We specialize in basement lowering and concrete slab installations.
8Verified listingTop ratedAquatech Basement Waterproofing Etobicoke
Islington-City Centre WestFoundations & UnderpinningAre you looking for basement waterproofing Etobicoke? Aquatech has been sealing Etobicoke basements for years.
9Verified listingTop ratedSVD Restoration Concrete Contracting
Islington-City Centre WestConcrete ContractorsToronto's leading concrete contractors for residential & commercial projects. Expert concrete driveways, pouring, foundation repair, and interlocking across the GTA and Muskoka.
10Verified listingTop ratedThe Foundation Kings Ltd.
ParkdaleFoundations & UnderpinningToronto underpinning specialists offering expert basement lowering and structural solutions. Trust The Foundation Kings.
11Verified listingTop ratedRoyal Work Basement Waterproofing
Islington-City Centre WestFoundations & UnderpinningRoyal Work is a waterproofing company offering basement waterproofing services in Mississauga. We can effectively fix your wet basement with reliable solutions!
12Verified listingTop ratedAquatech Waterproofing Vaughan
WillowdaleFoundations & UnderpinningLooking for basement waterproofing Vaughan, Ontario? At Aquatech Waterproofing, issues of leaks, dampness, and water damage should not worry you anymore.
13Verified listingTop ratedDurham Backhoe Basement Waterproofing
OshawaFoundations & UnderpinningLeaky basement repair, Interior and exterior basement waterproofing, and window wells. Locally owned and operated in the Oshawa area for the past 40 years with a Lifetime Warranty. Call your local basement leak repair specialist today!
14Verified listingTop ratedThe Reno Pros
Yonge & St. ClairFoundations & UnderpinningFind out why so many Toronto homeowners are trusting their basement underpinning to The Reno Pros. Give us a call today to book your free consultation.
15Verified listingTop ratedRCC Waterproofing Etobicoke
Islington-City Centre WestFoundations & UnderpinningDiscover RCC Waterproofing Etobicoke, your go-to experts for premier basement waterproofing solutions in the Etobicoke, Toronto area.
How much does foundation and underpinning work cost in Toronto?
According to Strong Basements, basement underpinning - structural work only runs $350–$650 per linear foot in the GTA, while basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) runs $50–$105 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 only | $350–$650(typ. $400–$480) | per linear foot | Strong Basements |
| Basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) | $50–$105(typ. $80–$100) | per sq ft | Strong Basements (low end: Nusite Group) |
| Full-basement underpinning - total project cost | $50,000–$120,000(typ. $60,000–$90,000) | per project | Capable Group Inc. |
| Bench footing (basement lowering alternative) | $75–$400(typ. $250–$350) | per linear foot | CSG Renovation (high end: Strong Basements) |
| Bench footing - priced by floor area | $35–$60(typ. $40–$55) | per sq ft | Nusite Group |
| Foundation crack repair - polyurethane injection (leaking crack) | $500–$1,000(typ. $600–$900) | per crack | DryShield Water Solutions |
| Foundation crack repair - structural epoxy injection | $800–$2,500(typ. $1,000–$1,800) | per crack | DryShield Water Solutions |
| Exterior foundation waterproofing (excavated) | $140–$300(typ. $180–$250) | per linear foot | DryShield Water Solutions |
How does ConcreteFinder rank foundation contractors?
Rankings can't be bought. ConcreteFinder scores each company with a Bayesian-adjusted Google rating, which weighs review volume so a 5.0 on three reviews does not outrank a 4.8 on three hundred. We then add small verification boosts for an active website, a listed phone number and real project photos. Across the GTA, 86% of rated foundation contractors clear 4.8★, so ranking gaps are meaningful. Positions update as new review data lands. Read our full methodology.
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
How much does foundation and underpinning work cost in Toronto and the GTA?
- According to Strong Basements, basement underpinning - structural work only runs $350–$650 per linear foot, and basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) runs $50–$105 per sq ft (Strong Basements (low end: Nusite Group)). Add 13% HST to any quote. ConcreteFinder's foundations & underpinning cost guide lists every line item with its source.
How do I choose a good foundation contractor in the GTA?
- Compare at least three written, itemized quotes rather than defaulting to the cheapest. ConcreteFinder ranks 155 foundation contractors at a median 4.86★ Google rating and a median of 32 reviews each, so start with the shortlist above, then confirm insurance and recent local references before you sign.
When is the best time to book 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.
Can companies pay to rank higher on ConcreteFinder?
- No. Rankings come from a Bayesian-adjusted Google rating plus verification boosts for a website, phone and photos, never payment. Across the GTA, 86% of rated foundation contractors clear 4.8★, so small ranking gaps are meaningful. Full details are on our methodology page.
What should you read next?
Compare ConcreteFinder's other Greater Toronto Area service rankings, or dig into the pricing and comparison guides for this project.
Get up to 3 free foundation and underpinning work quotes from top-rated GTA pros
No obligation. We match you with exclusive, local pros, so you compare and choose.
Get Quotes