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Best Foundation & Underpinning Contractors in Oakville (2026)

Last updated: By ConcreteFinder Research Team

6 foundation contractors currently serve Oakville, averaging 4.78★ on Google across 304 combined reviews, per ConcreteFinder's July 2026 dataset. With 6 companies carrying enough reviews to rate, the small differences in position here are meaningful. As reviews accumulate, we update the order, so it stays current.

Which foundation contractors rank highest in Oakville?

All 6 foundation contractors we track appear below in ranked order, with review volume weighed alongside the star average. Each card leads to a full profile and a free quote.

  1. AquaGuard Injection & Waterproofing: concrete work photographed at the business1

    AquaGuard Injection & Waterproofing

    79/100 ConcreteFinder Score

    70 reviews · 4.9

    Oakville

    • Foundations & Underpinning
    • Concrete Repair & Leveling
    • Mon to Sat, 8 a.m. to 8 p.m.
    • Says it is licensed
    • Says it is insured

    3 of 4 details on file · Pours in Oakville as a foundation contractor, 70 Google reviews average 4.9★, also listed under concrete repair & leveling.

  2. GJ MacRae Foundation Repair: concrete work photographed at the business2

    GJ MacRae Foundation Repair

    70/100 ConcreteFinder Score

    94 reviews · 4.8

    Oakville

    • Foundations & Underpinning
    • Concrete Repair & Leveling
    • Mon to Fri, 8 a.m. to 5 p.m.
    • Says it has been going since 1975

    3 of 4 details on file · A foundation contractor working Oakville, 94 Google reviews average 4.8★, also listed under concrete repair & leveling.

  3. Structure Shoring Inc.: concrete work photographed at the business4

    Structure Shoring Inc.

    59/100 ConcreteFinder Score

    9 reviews · 5.0

    Oakville

    • Foundations & Underpinning
    • Mon to Sat, 9 a.m. to 5 p.m.

    3 of 4 details on file · Pours in Oakville as a foundation contractor, 9 Google reviews average 5.0★, posted working hours.

  4. R5

    RCC Waterproofing Oakville

    58/100 ConcreteFinder Score

    43 reviews · 5.0

    Oakville

    • Foundations & Underpinning
    • 7 days, Open 24 hours

    2 of 4 details on file · Listed for foundation contractor work around Oakville, 43 Google reviews average 5.0★, posted working hours.

  5. Halton Wise Cracks: concrete work photographed at the business6

    Halton Wise Cracks

    48/100 ConcreteFinder Score

    4 reviews · 4.0

    Oakville

    • Concrete Contractors
    • Foundations & Underpinning
    • Says it has been going since 1991

    2 of 4 details on file · Pours in Oakville as a concrete contractor, 4 Google reviews average 4.0★, also listed under foundations & underpinning.

How much does foundation and underpinning work cost in Oakville?

For the area, our July 2026 dataset puts structural engineer site inspection / assessment runs $600–$1,200+ per visit (SEPCO Engineering) and city of Toronto minimum building permit fee (2026) runs $214.79–$214.79 per permit (minimum; underpinning is charged per linear metre on top) (City of Toronto Building Permit Fee Schedule). Quotes in Oakville generally track the wider GTA range. Those ranges exclude 13% HST.

Typical GTA foundations & underpinning prices for Oakville, July 2026. Each row cites its source.
ItemTypical rangeUnitSource
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$1,500per crackDryShield Basement Waterproofing (Toronto/GTA, 2026)
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$300per hourSEPCO Engineering
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$60per sq ftNusite 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$80,000per projectNusite Group (Toronto underpinning contractor)
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 visitSEPCO Engineering
City of Toronto minimum building permit fee (2026)A floor, not a range, and not the whole permit cost. The City charges $214.79 minimum on all work in 2026 and then calculates the permit as a service index times floor area; examination and inspection time is $92.79 an hour. Engineering, drawings, revisions and plumbing permits are extra.$214.79$214.79per permit (minimum; underpinning is charged per linear metre on top)City of Toronto Building Permit Fee Schedule

See the full Foundations & Underpinning cost guide

How does ConcreteFinder rank foundation contractors in Oakville?

Positions here reflect a published score that weighs how many reviews back each rating, not just the average, across the 6 foundation contractors on this page. The median company here carries 70 Google reviews. What a company states on its own site and the state of its record count too, but placement is never for sale. Read our full methodology.

Frequently asked questions

How many foundation contractors serve Oakville?

We track 6 companies in the area this July 2026, at an average Google rating of 4.78★ and a median of 70 reviews each. That is enough Oakville choice to line up three or more quotes before you commit.

How do I vet a foundation contractor in Oakville?

Confirm any local foundation contractor carries active WSIB coverage and liability insurance before the deposit, and ask to see the certificates. ConcreteFinder shows verification signals on each profile, but that paperwork is worth a direct check.

What should a written foundation and underpinning work quote include in Oakville?

An honest Oakville 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 much does foundation and underpinning work cost in Oakville?

For Oakville, one July 2026 benchmark: foundation crack repair - structural epoxy injection runs $750–$1,500 per crack in the GTA (DryShield Basement Waterproofing (Toronto/GTA, 2026)). Quotes there usually track that GTA range. Add 13% HST, and see the full foundations & underpinning cost guide.

Do foundation contractors in Oakville give free quotes?

Yes. A free on-site estimate is standard among local foundation contractors. ConcreteFinder lists the Oakville companies with their public phone number and website, so you can line up two or three visits yourself and compare scope side by side.

Can companies pay to rank higher on this page?

Oakville rankings are not paid. The 6 companies here are ordered by a review-volume-weighted Google score and light verification checks, and no one can pay to move up. In Oakville, 83% 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 waterproofing and drainage go in while the foundation is open?
  • What is the inspection schedule, and who books the city inspections?
  • Will you provide stamped engineering drawings and pull the building permit? Engineering and permit cost benchmarks

Where else can you compare foundation contractors near Oakville?

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