32 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in London: DrainCam Plumbing, CR Score 62/100; 4.9★ from 329 Google reviews; open 24/7.
Best for emergencies (open 24/7): RCC Waterproofing London, posts 24/7 hours; ranked #2 of 32.
Most-reviewed: Advanced Basement Systems, 172 Google reviews at 4.9★, the most of 32 ranked after DrainCam Plumbing; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
32 London foundation repair companies are ranked here by CR Score, from ten published factors. 12 are open 24/7, 20 open Saturdays and 15 open Sundays, based on posted hours. The median Google rating is 4.8★ across 32 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | DrainCam Plumbing | 62 | 4.9★ (329) | London | 24/7 | Overall |
| 2 | RCC Waterproofing London | 61 | 4.5★ (20) | London | 24/7 | Emergencies |
| 3 | Foundation Brothers | 60 | 4.9★ (160) | Norfolk County, 54 km away | Sat · Sun · Evenings | — |
| 4 | ROYAL RESTORATION EPOXY FLOORS & CONCRETE RESURFACING | 59 | 5.0★ (143) | London | Sat · Sun · Evenings | — |
| 5 | Best Plumbing and Drainage Contractors | 58 | 4.8★ (85) | London | 24/7 | — |
| 6 | On Point Masonry Repair and Waterproofing | 58 | 4.9★ (61) | Norfolk County, 64 km away | 24/7 | — |
| 7 | Basement Waterproofing Solutions | 58 | 5.0★ (6) | Lambton Shores, 17 km away | 24/7 | — |
| 8 | Jumbo Plumbing | 57 | 5.0★ (35) | London | 24/7 | — |
| 9 | Basement Waterproofing Pros | 56 | 4.8★ (9) | London | 24/7 | — |
| 10 | Koala Insulation of London | 56 | 5.0★ (21) | London | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 329 Google reviews, the most in London.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #2 because of its Google rating and trade focus: 4.5★ from 20 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 54 km away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 160 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #4 because of its Google rating and review volume: 5.0★ from 143 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #5 because of its Google rating and review volume: 4.8★ from 85 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 64 km away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 61 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lambton Shores, 17 km away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #8 because of its Google rating and review volume: 5.0★ from 35 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #9 because of its Google rating and trade focus: 4.8★ from 9 Google reviews, listed on Google as “Water damage restoration service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #10 because of its Google rating and review volume: 5.0★ from 21 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 24 km away
Ranked #11 because of its Google rating and review volume: 5.0★ from 46 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #12 because of its Google rating and review volume: 4.9★ from 172 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #13 because of its Google rating and review volume: 4.8★ from 73 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 23 km away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Landscaper”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #15 because of its Google rating and availability: 5.0★ from 13 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #16 because of its Google rating and availability: 4.6★ from 11 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woodstock, 38 km away
Ranked #17 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Thomas, 26 km away
Ranked #18 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woodstock, 41 km away
Ranked #19 because of its Google rating and trade focus: 4.6★ from 44 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ancaster, 8 km away
Ranked #20 because of its Google rating and review volume: 4.9★ from 39 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lambton Shores, 20 km away
Ranked #21 because of its Google rating and trade focus: 4.7★ from 52 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #22 because of its Google rating and review volume: 4.8★ from 21 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #23 because of its Google rating and review volume: 4.7★ from 34 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stratford, 46 km away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 3 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Stratford, 48 km away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 3 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#1 to #25 are shown in full above. Here are #26 to #32, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Corner Gas Plumbing & Home Renovations | 50 | 5.0★ (16) | In London |
| 27 | The Porch Doctor - Flexstone Coatings | 49 | 5.0★ (48) | 41 km |
| 28 | Goliath Roofing - Roof Installations and Skylights | 48 | 4.9★ (42) | 48 km |
| 29 | Mobile Mix Concrete | 47 | 3.1★ (9) | In London |
| 30 | RVM Trucking | 47 | 4.7★ (23) | 55 km |
| 31 | Co-Fo Concrete Forming Construction Ltd | 47 | 5.0★ (3) | In London |
| 32 | A.P. Hurley Construction & Emergency Services | 45 | 4.3★ (8) | 45 km |
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 |
|---|---|---|
| ABA Construction | 4.6★ (121) | In London |
| Allside Masonry | 5.0★ (33) | In London |
| Babylon Construction | 4.9★ (79) | In London |
| Beardown Contracting | 4.8★ (26) | In London |
| Concrete 95 Ltd | 5.0★ (15) | In London |
| Davinci Contractors Group Inc. | 4.6★ (57) | In London |
| Forestcitybrickwork | 4.1★ (18) | In London |
| Friesen Renovations | 4.6★ (52) | In London |
| GEM Concrete Construction Inc | 4.8★ (60) | In London |
| J & S Masonry, Restoration and Genereal contracting | 4.4★ (7) | In London |
| Johnstone Property Maintenance | 4.9★ (259) | In London |
| Lancaster Flagstone Brick & Concrete | 4.7★ (55) | In London |
| London Concrete Forming | 5.0★ (7) | In London |
| Old West Construction | 5.0★ (14) | In London |
| PHT Construction | 5.0★ (95) | In London |
| Renown Contractors | 4.6★ (20) | In London |
| Riverside Concrete Forming | 3.1★ (19) | In London |
| Sensibuild Construction | 4.2★ (9) | In London |
| Ultimate Touch Concrete | 5.0★ (13) | In London |
| Wayfarer Renovations | 5.0★ (45) | In London |
US national ranges converted to CAD, not adjusted for London. 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 32 London 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 London 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 |