Last updated: By ConcreteFinder Research Team
In the Don Mills area, ConcreteFinder counts 8 foundation contractors averaging 4.94★ on Google, drawn from 278 reviews collected for July 2026. A typical foundation contractor on this list carries 19 Google reviews, enough history to judge real workmanship, and our ranking weighs that volume, not just stars. There are no advertiser slots here: every input to the order is published, and claiming a listing costs nothing.
Below are all 8 foundation contractors ConcreteFinder tracks in Don Mills, ordered by our published score so consistent, high-volume reputations rise first. Each card opens a full profile and a free quote request.
169/100 ConcreteFinder Score
5 reviews · 5.0
Don Mills
3 of 4 details on file · Don Mills foundation contractor, 5 Google reviews average 5.0★, posted working hours.
67/100 ConcreteFinder Score
184 reviews · 4.8
Don Mills
2 of 4 details on file · A foundation contractor working Don Mills, 184 Google reviews average 4.8★, posted working hours.
364/100 ConcreteFinder Score
19 reviews · 4.9
Don Mills
3 of 4 details on file · Listed for foundation contractor work around Don Mills, 19 Google reviews average 4.9★, posted working hours.
460/100 ConcreteFinder Score
25 reviews · 5.0
Don Mills
3 of 4 details on file · Listed for foundation contractor work around Don Mills, 25 Google reviews average 5.0★, also listed under concrete contractors.
558/100 ConcreteFinder Score
16 reviews · 5.0
Don Mills
3 of 4 details on file · Don Mills foundation contractor, 16 Google reviews average 5.0★, also listed under concrete contractors and stamped & decorative concrete.
656/100 ConcreteFinder Score
10 reviews · 5.0
Don Mills
3 of 4 details on file · A concrete contractor working Don Mills, 10 Google reviews average 5.0★, also listed under foundations & underpinning.
754/100 ConcreteFinder Score
2 reviews · 5.0
Don Mills
3 of 4 details on file · Listed for foundation contractor work around Don Mills, 2 Google reviews average 5.0★, also listed under concrete contractors.
54/100 ConcreteFinder Score
19 reviews · 4.9
Don Mills
2 of 4 details on file · Listed for foundation contractor work around Don Mills, 19 Google reviews average 4.9★, posted working hours.
Homeowners pricing foundation and underpinning work here can anchor on two line items: structural engineering drawings for underpinning permit runs $2,000–$5,000 per project (Strong Basements (Toronto)) and structural engineer hourly rate (Toronto/GTA) runs $150–$300 per hour (SEPCO Engineering). In Don Mills, constrained access and haulaway often nudge quotes to the upper end. Add 13% HST before comparing quotes.
| Item | Typical range | Unit | Source |
|---|---|---|---|
| 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) |
| Foundation crack repair - polyurethane injection (leaking crack)DryShield's polyurethane tier, for stopping active leaks with a flexible seal that tolerates seasonal movement. HST and finishing work are not included unless quoted. The $500 floor this guide used to show is not on their page. | $750–$1,000 | per crack | DryShield Basement Waterproofing (Toronto/GTA, 2026) |
| 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 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) |
| Basement underpinning - structural work onlyStrong Basements' Toronto average for the structural work alone. Elsewhere on the same page they put the market rate for a professionally managed, fully insured project at $350 to over $600 per linear foot, with crawlspaces often at the higher end. Cost varies with soil conditions, depth of lowering, the underpinning method (non-shrink, overpour, L-shape, bench footing, engineered bench) and structural requirements such as load posts and beams. The flat $650 ceiling this guide used to show is not on their page. | $350–$480 | per linear foot | Strong Basements |
| 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) |
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 19 Google reviews. That keeps the list of 8 honest, and no spot is ever paid for. Read our full methodology.
No, placement can't be bought. We rank the 8 Don Mills 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 Don Mills, 100% of rated companies clear 4.8★, so small gaps matter.
As of July 2026, 8 foundation contractors cover Don Mills, at an average Google rating of 4.94★ and a median of 19 reviews each. With that many local options, get three quotes and compare scope, not just price.
In Don Mills, this is year-round work, since it happens indoors or below grade rather than on open ground. Good local foundation contractors book up in peak weeks, so request quotes with some lead time.
Structural engineering drawings for underpinning permit runs $2,000–$5,000 per project across the GTA, per Strong Basements (Toronto). Quotes there can sit at the higher end. Figures exclude 13% HST; our foundations & underpinning cost guide breaks down every line item for Don Mills.
Before hiring, request a live WSIB clearance and a liability certificate, and verify the dates. ConcreteFinder surfaces verification signals on every Don Mills profile, yet the actual insurance paperwork should be confirmed with the foundation contractor first.
Yes. Underpinning, bench footings and any structural foundation work in Don Mills need a building permit plus stamped drawings from a licensed Ontario structural engineer under the Building Code, and the city inspects in stages. That process is why an underpinning job is scoped very differently from flatwork, and because it is excavation work it runs year-round.
If none of the Don Mills shortlist suits, check foundation and underpinning work in adjacent areas or ConcreteFinder's other rankings nearby.
No obligation. We match you with exclusive, local pros, so you compare and choose.