1Durham Backhoe Basement Waterproofing
73/100 ConcreteFinder Score
79 reviews · 5.0
Oshawa
- Foundations & Underpinning
- Says about 40 years going
2 of 4 details on file · A foundation contractor working Oshawa, 79 Google reviews average 5.0★.
Best Foundation & Underpinning Contractors in Oshawa (2026)
Last updated: By ConcreteFinder Research Team
There are 6 foundation contractors on ConcreteFinder's Oshawa list, rated 4.92★ on average, supported by 330 Google reviews this July 2026. With 5 companies carrying enough reviews to rate, the small differences in position here are meaningful. There are no advertiser slots here: every input to the order is published, and claiming a listing costs nothing.
Which foundation contractors rank highest in Oshawa?
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
- D2
Dryshield Basement Waterproofing Oshawa
71/100 ConcreteFinder Score
10 reviews · 5.0
Oshawa
- Foundations & Underpinning
- Concrete Repair & Leveling
- 7 days, 6 a.m. to 11 p.m.
- Says it is insured
- Says it carries WSIB coverage
2 of 4 details on file · Listed for foundation contractor work around Oshawa, 10 Google reviews average 5.0★, also listed under concrete repair & leveling.
3ACCL Waterproofing
67/100 ConcreteFinder Score
20 reviews · 4.6
Oshawa
- Foundations & Underpinning
- 7 days, 12 a.m. to 11:30 p.m.
- Says it is licensed
- Says it is insured
3 of 4 details on file · A foundation contractor working Oshawa, 20 Google reviews average 4.6★, posted working hours.
4Aquaphobia Foundation Repair & Crack Injections
65/100 ConcreteFinder Score
112 reviews · 5.0
Oshawa
- Foundations & Underpinning
- Concrete Repair & Leveling
- 7 days, 9 a.m. to 9 p.m.
3 of 4 details on file · Pours in Oshawa as a foundation contractor, 112 Google reviews average 5.0★, also listed under concrete repair & leveling.
5Elite Foundations
63/100 ConcreteFinder Score
109 reviews · 5.0
Oshawa
- Foundations & Underpinning
- Concrete Repair & Leveling
- 7 days, 7 a.m. to 9 p.m.
3 of 4 details on file · Oshawa foundation contractor, 109 Google reviews average 5.0★, also listed under concrete repair & leveling.
6United Concrete Finishing
40/100 ConcreteFinder Score
1 reviews · 5.0
Oshawa
- Concrete Contractors
- Foundations & Underpinning
- Concrete Patios & Walkways
- 7 days, 7 a.m. to 5 p.m.
3 of 4 details on file · Pours in Oshawa as a concrete contractor, 1 Google reviews average 5.0★, also listed under foundations & underpinning and concrete patios & walkways.
How much does foundation and underpinning work cost in Oshawa?
Pricing foundation and underpinning work locally is easiest to judge from real line items. Structural engineering drawings for underpinning permit runs $2,000–$5,000 per project, per Strong Basements (Toronto), and structural engineer hourly rate (Toronto/GTA) runs $150–$300 per hour, per SEPCO Engineering. Pricing across Oshawa usually lands near the GTA midpoint. All figures come before 13% HST.
| Item | Typical range | Unit | Source |
|---|---|---|---|
| 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 |
| 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–$214.79 | per permit (minimum; underpinning is charged per linear metre on top) | City of Toronto Building Permit Fee Schedule |
| 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) |
| 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 |
| 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) |
| 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 in Oshawa?
The ranking on this page blends each firm's star average with its review count, so the 6 companies in Oshawa are judged on durable reputation. The median company here carries 79 Google reviews. ConcreteFinder also counts checkable details of the record, and sells no placements. Read our full methodology.
Frequently asked questions
Do foundation contractors in Oshawa give free quotes?
Free estimates are the norm for local foundation contractors, usually after a short site visit. ConcreteFinder does not book them for you; it ranks the companies and publishes how to reach each one.
What should a written foundation and underpinning work quote include in Oshawa?
Look for a quote that spells out preparation, slab thickness, reinforcement, finish and haulaway, plus deposit, payment stages and warranty. When two Oshawa bids differ a lot, it is usually the scope, so read the line items before choosing.
How much choice do I have for foundation and underpinning work in Oshawa?
As of July 2026, 6 foundation contractors cover Oshawa, at an average Google rating of 4.92★ and a median of 79 reviews each. With that many local options, get three quotes and compare scope, not just price.
Can companies pay to rank higher on this page?
No, placement can't be bought. We rank the 6 Oshawa 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 Oshawa, 80% of rated companies clear 4.8★, so small gaps matter.
How do I vet a foundation contractor in Oshawa?
Before hiring, request a live WSIB clearance and a liability certificate, and verify the dates. ConcreteFinder surfaces verification signals on every Oshawa profile, yet the actual insurance paperwork should be confirmed with the foundation contractor first.
Do I need a permit to underpin a basement in Oshawa?
An Oshawa 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.
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?
- Is this underpinning or bench footing, and why is that right for my house?
Where else can you compare foundation contractors near Oshawa?
If none of the Oshawa shortlist suits, check foundation and underpinning work in adjacent areas or ConcreteFinder's other rankings nearby.
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