267 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in St. Catharines: RCC Waterproofing Toronto, CR Score 60/100; 4.8★ from 634 Google reviews; open 24/7.
Best for emergencies (open 24/7): Aquamaster Basement Waterproofing Mississauga, posts 24/7 hours; ranked #4 of 267.
Most-reviewed: Aquatech Basement Waterproofing Toronto, 655 Google reviews at 5.0★, the most of 267 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
267 St. Catharines foundation repair companies are ranked here by CR Score, from ten published factors. 105 are open 24/7, 217 open Saturdays and 156 open Sundays, based on posted hours. The median Google rating is 5.0★ across 267 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | RCC Waterproofing Toronto | 60 | 4.8★ (634) | Toronto, 62 km away | 24/7 | Overall |
| 2 | Aquatech Basement Waterproofing Toronto | 60 | 5.0★ (655) | Toronto, 60 km away | Sat · Sun · Evenings | Most reviews |
| 3 | Harris Waterproofing | 59 | 4.8★ (85) | Brant, 18 km away | Sat · Sun | — |
| 4 | Aquamaster Basement Waterproofing Mississauga | 59 | 5.0★ (123) | Mississauga, 51 km away | 24/7 | Emergencies |
| 5 | ROOTERWORX | 59 | 5.0★ (121) | Mississauga, 51 km away | 24/7 | — |
| 6 | McMillan Waterproofing Niagara | 59 | 5.0★ (51) | St. Catharines | Sat | — |
| 7 | Canada Waterproofers | 59 | 5.0★ (316) | Mississauga, 55 km away | Sat · Sun · Evenings | — |
| 8 | Aquatech Basement Waterproofing Mississauga | 59 | 5.0★ (109) | Mississauga, 52 km away | 24/7 | — |
| 9 | Royal Work Basement Waterproofing Hamilton | 59 | 5.0★ (132) | Hamilton, 43 km away | Sat · Sun · Evenings | — |
| 10 | Aquamaster Basement Waterproofing Hamilton | 59 | 5.0★ (143) | Hamilton, 45 km away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 634 Google reviews, listed on Google as “Waterproofing service”.
Based in Toronto, 60 km away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 655 Google reviews, listed on Google as “Waterproofing service”.
Based in Brant, 18 km away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 85 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 51 km away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 123 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 51 km away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 121 Google reviews, listed on Google as “Waterproofing service”.
Based in St. Catharines
Ranked #6 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 55 km away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 316 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 52 km away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 109 Google reviews, listed on Google as “Waterproofing service”.
Based in Hamilton, 43 km away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Waterproofing service”.
Based in Hamilton, 45 km away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 143 Google reviews, listed on Google as “Waterproofing service”.
Based in Toronto, 54 km away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 274 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 56 km away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 121 Google reviews, listed on Google as “Waterproofing service”.
Based in Toronto, 60 km away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 271 Google reviews, listed on Google as “Waterproofing service”.
Based in Burlington, 37 km away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 41 Google reviews, listed on Google as “Waterproofing service”.
Based in Burlington, 41 km away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 57 km away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 161 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 57 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 166 Google reviews, listed on Google as “Waterproofing service”.
Based in Hamilton, 41 km away
Ranked #18 because of its Google rating and trade focus: 4.5★ from 80 Google reviews, listed on Google as “Waterproofing service”.
Based in Oakville, 48 km away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Waterproofing service”.
Based in Hamilton, 52 km away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 107 Google reviews, listed on Google as “Waterproofing service”.
Based in Toronto, 54 km away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Waterproofing service”.
Based in Oakville, 48 km away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “Waterproofing service”.
Based in Welland, 22 km away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 128 Google reviews, listed on Google as “Waterproofing service”.
Based in Mississauga, 61 km away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 70 Google reviews, listed on Google as “Waterproofing service”.
Based in Etobicoke, 56 km away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Waterproofing service”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 267 ranked foundation repair companies here; the rest are on their profiles.
20 more foundation repair companies within 64 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| a waterproofing | 5.0★ (2) | 60 km |
| Cecchini Plumbing | 5.0★ (1) | 36 km |
| Complete Casa Construction | 5.0★ (21) | In St. Catharines |
| Easy Mix Concrete | 1.0★ (2) | 48 km |
| Hepp Contractors | 5.0★ (1) | In St. Catharines |
| Holt Construction Services Ltd. | 5.0★ (2) | 57 km |
| JP DOMUS DESIGN & BUILD | 5.0★ (2) | 61 km |
| L & L Contracting And Waterproofing INC | 3.0★ (2) | 62 km |
| Mitchell's Stucco and Parging | 4.8★ (53) | In St. Catharines |
| Ney Construction Inc | 5.0★ (2) | 63 km |
| Niagara Regional Construction | 4.7★ (3) | In St. Catharines |
| Reska & Sons, Llc | 5.0★ (2) | 50 km |
| RJR Excavating | 5.0★ (2) | 21 km |
| Sarge Roofing & Contracting | 5.0★ (2) | 50 km |
| Stone Foundations | 1.0★ (2) | In St. Catharines |
| Techno METAL POST Niagara | 5.0★ (7) | In St. Catharines |
| Theriault Forming Construction Ltd. | 5.0★ (1) | 38 km |
| TSN Lighthouse Ltd. | 5.0★ (2) | 50 km |
| VK pro Plumbing | 5.0★ (2) | 57 km |
| X Contracting Group INC. | 4.9★ (61) | In St. Catharines |
US national ranges converted to CAD, not adjusted for St. Catharines. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Foundation repair | CA$3,130 | CA$7,270 | CA$11,430 | Per project: typical range of customer-reported repairs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 267 St. Catharines foundation repair companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In St. Catharines data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |