1Basement Foundation Repair
71/100 ConcreteFinder Score
18 reviews · 4.8
Leaside
- Foundations & Underpinning
- Says it is licensed
- Says it is insured
2 of 4 details on file · Pours in Leaside as a foundation contractor, 18 Google reviews average 4.8★.
Best Foundation & Underpinning Contractors in Leaside (2026)
Last updated: By ConcreteFinder Research Team
There are 7 foundation contractors on ConcreteFinder's the Leaside area list, rated 4.97★ on average, supported by 113 Google reviews this July 2026. With 6 companies carrying enough reviews to rate, the small differences in position here are meaningful. Placement can't be bought: positions come from public review data, what a company states on its own site, and whether it has claimed its listing, which is free.
Which foundation contractors rank highest in Leaside?
ConcreteFinder lists 7 contractors in Leaside here, sorted so steady, well-reviewed operators lead and thin one-off ratings do not. Every card links a profile and a quote request.
- 1
2True North Underpinning
67/100 ConcreteFinder Score
35 reviews · 5.0
Leaside
- Concrete Contractors
- Foundations & Underpinning
- Mon to Fri, 8 a.m. to 6 p.m.
- Says it is licensed
- Says it is insured
3 of 4 details on file · Listed for concrete contractor work around Leaside, 35 Google reviews average 5.0★, also listed under foundations & underpinning.
3Mud Monkeys Waterproofing
66/100 ConcreteFinder Score
21 reviews · 5.0
Leaside
- Foundations & Underpinning
- Mon to Fri, 8 a.m. to 4 p.m.
- Says about 25 years going
3 of 4 details on file · A foundation contractor working Leaside, 21 Google reviews average 5.0★, posted working hours.
- S4
Strong Basements Inc. - Waterproofing & Underpinning Contractor
66/100 ConcreteFinder Score
11 reviews · 5.0
Leaside
- Foundations & Underpinning
- Concrete Contractors
- Concrete Repair & Leveling
- 7 days, Open 24 hours
- Says it is insured
- Says it has been going since 2010
2 of 4 details on file · Pours in Leaside as a foundation contractor, 11 Google reviews average 5.0★, also listed under concrete contractors and concrete repair & leveling.
5Journeymen restoration and masonry
61/100 ConcreteFinder Score
16 reviews · 5.0
Leaside
- Concrete Patios & Walkways
- Foundations & Underpinning
- Mon to Fri, 7:30 a.m. to 5 p.m.
3 of 4 details on file · Pours in Leaside as a concrete patio contractor, 16 Google reviews average 5.0★, also listed under foundations & underpinning.
- L6
Leaky Basement
53/100 ConcreteFinder Score
12 reviews · 5.0
Leaside
- Foundations & Underpinning
- 7 days, Open 24 hours
2 of 4 details on file · Leaside foundation contractor, 12 Google reviews average 5.0★, posted working hours.
7Basement Waterproofing Toronto - Foundation Crack Repair
48/100 ConcreteFinder Score
2 reviews · 4.0
Leaside
- Foundations & Underpinning
- Concrete Repair & Leveling
- Says it has been going since 1991
2 of 4 details on file · Listed for foundation contractor work around Leaside, 2 Google reviews average 4.0★, also listed under concrete repair & leveling.
How much does foundation and underpinning work cost in Leaside?
Homeowners pricing foundation and underpinning work here can anchor on two line items: basement underpinning - turn-key project (engineering, permits, waterproofing, plumbing, new slab) runs $80–$100 per sq ft (Strong Basements (low end: Nusite Group)) and underpinning a 1,000 sq ft basement lowered by 2 feet (total project) runs $50,000–$80,000 per project (Nusite Group (Toronto underpinning contractor)). Expect Leaside quotes to trend higher where site access and disposal are limited. Add 13% HST before comparing quotes.
| Item | Typical range | Unit | Source |
|---|---|---|---|
| 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 |
| 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) |
| 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) |
| 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) |
| Structural engineer hourly rate (Toronto/GTA)An hourly consultation rate for advice only. SEPCO puts Toronto and the GTA at the top of the provincial band, $150 to $300 per hour, for highest demand and fastest turnaround. | $150–$300 | per hour | SEPCO Engineering |
| Structural engineer site inspection / assessmentOpen-ended at the top: SEPCO writes $600 to $1,200+. Covers a site visit, assessment and an optional letter or report. | $600–$1,200+ | per visit | SEPCO Engineering |
How does ConcreteFinder rank foundation contractors in Leaside?
Every foundation contractor here is ranked by the same public formula: a review-volume-weighted Google rating, what the company states on its own site, and the state of its record. The median company here carries 18 Google reviews. That keeps the list of 7 honest, and no spot is ever paid for. Read our full methodology.
Frequently asked questions
What should a written foundation and underpinning work quote include in Leaside?
An honest Leaside quote names the prep, mix and thickness, reinforcement, finish, joints and disposal, then deposit, stages and warranty. If a bid is a single lump sum with no breakdown, ask for the itemized version before you sign.
How many foundation contractors are there in Leaside?
ConcreteFinder lists 7 foundation contractors actively serving Leaside as of July 2026, at an average Google rating of 4.97★ and a median of 18 reviews each. Compare at least three of these quotes before hiring.
How far ahead do foundation contractors in Leaside book up?
Frost does not stop foundation and underpinning work here: crews work through winter on interior and below-grade jobs. Reputable Leaside foundation contractors still book ahead, so start early and compare a few.
Do I need a permit to underpin a basement in Leaside?
A Leaside underpinning project cannot proceed without a permit. Structural foundation work requires engineered, stamped drawings from a licensed Ontario engineer and staged inspections under the Building Code. Budget for that engineering and oversight up front; the upside is that this excavation work can be done in any season.
How do I vet a foundation contractor in Leaside?
Before hiring, request a live WSIB clearance and a liability certificate, and verify the dates. ConcreteFinder surfaces verification signals on every Leaside profile, yet the actual insurance paperwork should be confirmed with the foundation contractor first.
Can companies pay to rank higher on this page?
No, placement can't be bought. We rank the 7 Leaside foundation contractors here on a published score out of 100: reviews with volume weighed, what the company states on its own site, and the state of its record. In Leaside, 100% of rated companies clear 4.8★, so small gaps matter.
Questions to ask your contractor
- How do you protect the existing structure and the neighbours during excavation?
- What is the inspection schedule, and who books the city inspections?
- What waterproofing and drainage go in while the foundation is open?
- Will you provide stamped engineering drawings and pull the building permit? Engineering and permit cost benchmarks
Where else can you compare foundation contractors near Leaside?
Not finding the right Leaside fit? Browse foundation and underpinning work in nearby areas, or compare other ConcreteFinder service rankings in the area.
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