65 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in O'Fallon: Acculevel, CR Score 63/100; 4.8★ from 407 Google reviews; open 24/7.
Best for emergencies (open 24/7): Tiger Plumbing, Heating, Air Conditioning, & Electrical Services, posts 24/7 hours; ranked #4 of 65.
Most-reviewed: Tiger Plumbing, Heating, Air Conditioning, & Electrical Services, 5,072 Google reviews at 4.7★, the most of 65 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
65 O'Fallon foundation repair companies are ranked here by CR Score, from ten published factors. 9 are open 24/7, 29 open Saturdays and 12 open Sundays, based on posted hours. The median Google rating is 4.9★ across 65 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Acculevel | 63 | 4.8★ (407) | Belleville, 8 mi away | 24/7 | Overall |
| 2 | Helitech Waterproofing & Foundation Repair | 63 | 4.9★ (2,201) | East Saint Louis, 8 mi away | Sat | — |
| 3 | Woods Basement Systems, Inc. | 62 | 4.7★ (2,403) | Collinsville, 7 mi away | Sat · Evenings | — |
| 4 | Tiger Plumbing, Heating, Air Conditioning, & Electrical Services | 59 | 4.7★ (5,072) | Collinsville, 8 mi away | 24/7 | Emergencies, Most reviews |
| 5 | Mayim Basement Waterproofing | 55 | 4.9★ (25) | East Saint Louis, 18 mi away | Sat · Sun · Evenings | — |
| 6 | Crawlspace Medic of St. Louis | 55 | 4.8★ (128) | St. Louis, 23 mi away | Sat · Evenings | — |
| 7 | Perma Jack of St. Louis | 54 | 4.9★ (311) | Manchester, 31 mi away | — | — |
| 8 | Honor Heating, Air and Plumbing Inc. | 54 | 4.9★ (40) | East Saint Louis, 4 mi away | 24/7 | — |
| 9 | Foundation Recovery Systems Downtown St. Louis | 54 | 4.9★ (72) | St. Louis, 16 mi away | Sat · Sun · Evenings | — |
| 10 | Ram Jack St. Louis | 54 | 4.8★ (202) | Arnold, 27 mi away | 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 407 Google reviews, listed on Google as “Waterproofing service”.
Based in East Saint Louis, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 2,201 Google reviews, listed on Google as “Waterproofing service”.
Based in Collinsville, 7 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 2,403 Google reviews, listed on Google as “Waterproofing service”.
Based in Collinsville, 8 mi away
Ranked #4 because of its Google rating and review volume: 4.7★ from 5,072 Google reviews, the most in O'Fallon.
Based in East Saint Louis, 18 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 25 Google reviews, listed on Google as “Waterproofing service”.
Based in St. Louis, 23 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “Waterproofing service”.
Based in Manchester, 31 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 311 Google reviews, listed on Google as “Waterproofing service”.
Based in East Saint Louis, 4 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 40 Google reviews, open 24/7.
Based in St. Louis, 16 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Concrete contractor”.
Based in Arnold, 27 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 202 Google reviews, listed on Google as “Waterproofing service”.
Based in Chesterfield, 39 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 24 Google reviews, listed on Google as “Waterproofing service”.
Based in St. Louis, 25 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Waterproofing service”.
Based in Highland, 16 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 89 Google reviews, listed on Google as “Waterproofing service”.
Based in Saint Charles, 37 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Waterproofing service”.
Based in Florissant, 27 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 130 Google reviews, listed on Google as “Painting studio”.
Based in East Saint Louis, 16 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Waterproofing service”.
Based in Columbia, 20 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Foundation”.
Based in Shiloh, 15 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Waterproofing service”.
Based in Edwardsville, 18 mi away
Ranked #19 because of its Google rating and review volume: 5.0★ from 124 Google reviews.
Based in Columbia, 19 mi away
Ranked #20 because of its Google rating and review volume: 4.8★ from 124 Google reviews.
Based in Murphy, 30 mi away
Ranked #21 because of its Google rating and trade focus: 1.3★ from 4 Google reviews, listed on Google as “Waterproofing service”.
Based in St. Louis, 22 mi away
Ranked #22 because of its Google rating and review volume: 4.9★ from 355 Google reviews.
Based in Barnhart, 18 mi away
Ranked #23 because of its Google rating and availability: 4.8★ from 22 Google reviews, open 24/7.
Based in East Saint Louis, 13 mi away
Ranked #24 because of its Google rating and availability: 5.0★ from 8 Google reviews, open 24/7.
Based in Saint Charles, 34 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 304 Google reviews.
National price ranges in USD, not adjusted for O'Fallon. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Foundation repair | $2,225 | $5,174 | $8,133 | Per project: typical range of customer-reported repairs. US national range | October 2026 |
We scored 65 O'Fallon 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 O'Fallon 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 |