ConcreteFinder

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 115 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 plus verification checks.

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. Mud Monkeys Waterproofing1
    Verified listingTop rated

    Mud Monkeys Waterproofing

    Foundations & Underpinning

    Protect your home with our professional exterior and interior waterproofing solutions. Ensure a dry and safe environment with Mud Monkeys Inc.!

    (416) 891-8884Get Quotes
  4. True North Underpinning4
    Verified listingTop rated

    True North Underpinning

    Concrete Contractors

    As Toronto's leading Underpinning Contractor, we are dedicated to delivering the highest quality craftsmanship in the industry. Contact True North Underpinning!

    (416) 828-3985Get Quotes

How much does foundation and underpinning work cost in Leaside?

Homeowners pricing foundation and underpinning work here can anchor on two line items: exterior foundation waterproofing (excavated) runs $140–$300 per linear foot (DryShield Water Solutions) and screw pile / helical pier underpinning runs $3,000–$5,000 per pile (Capable Group Inc.). Expect Leaside quotes to trend higher where site access and disposal are limited. Add 13% HST before comparing quotes.

Typical GTA foundations & underpinning prices for Leaside, July 2026. Each row cites its source.
ItemTypical rangeUnitSource
Full-basement underpinning - total project cost$50,000–$120,000(typ. $60,000–$90,000)per projectCapable Group Inc.
Structural engineering drawings for underpinning permit$1,500–$6,000(typ. $2,000–$5,000)per projectStrong Basements (corroborated by SEPCO Engineering $1,500–$4,000+)
Bench footing - priced by floor area$35–$60(typ. $40–$55)per sq ftNusite Group
Foundation crack repair - polyurethane injection (leaking crack)$500–$1,000(typ. $600–$900)per crackDryShield Water Solutions
Screw pile / helical pier underpinning$3,000–$5,000(typ. $3,500–$4,500)per pileCapable Group Inc.
Bench footing (basement lowering alternative)$75–$400(typ. $250–$350)per linear footCSG Renovation (high end: Strong Basements)

See the full Foundations & Underpinning cost guide

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 plus small, checkable verification boosts. 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?

An 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 by a Bayesian-adjusted Google rating (volume matters, not just stars) plus small verification boosts for a website, phone and photos. 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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