56/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.8★ from 59 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 59 Google reviews
- Hours
- Mon–Sat 9 AM–5 PM · Sun closed
Best Foundation Repair Companies in Sullivan, MO (2026)
10 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Sullivan: Quacker's Waterproofing & Basement Repair, CR Score 56/100; 4.8★ from 59 Google reviews; open Saturdays until 5 PM.
- 2
Best for emergencies (open 24/7): Rattini Roofing & Exteriors, LLC, posts 24/7 hours; ranked #2 of 10.
- 2
Most-reviewed: Rattini Roofing & Exteriors, LLC, 160 Google reviews at 5.0★, the most of 10 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Sullivan foundation repair companies are ranked here by CR Score, from ten published factors. 1 is open 24/7, 4 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.8★ across 10 rated businesses.
Top 10 foundation repair companies in Sullivan at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Quacker's Waterproofing & Basement Repair | 56 | 4.8★ (59) | Saint Peters, 35 mi away | Sat | Overall |
| 2 | Rattini Roofing & Exteriors, LLC | 56 | 5.0★ (160) | Chesterfield, 39 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Unerstall Foundations & Flatwork Inc | 53 | 4.8★ (45) | Union, 18 mi away | — | — |
| 4 | Acculift | 52 | 4.5★ (44) | Wentzville, 39 mi away | — | — |
| 5 | Emmendorfer Exteriors LLC | 52 | 5.0★ (18) | Union, 18 mi away | Sat · Sun · Evenings | — |
| 6 | Crack Doctor STL | 52 | 5.0★ (3) | Saint Peters, 35 mi away | Sat · Sun | — |
| 7 | Estes Home Solutions L.L.C. | 51 | 4.4★ (7) | Affton, 26 mi away | — | — |
| 8 | Mentz Foundations Inc | 50 | 4.4★ (14) | Union, 19 mi away | — | — |
| 9 | Rayne Foundation Repair | 49 | 5.0★ (6) | Barnhart, 40 mi away | — | — |
| 10 | M & M Foundation Construction, LLC | 47 | 4.4★ (5) | Union, 23 mi away | — | — |
The 10 best foundation repair companies in Sullivan, ranked
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.
Based in Chesterfield, 39 mi away
56/100CR ScoreRanked #2 because of its Google rating and review volume: 5.0★ from 160 Google reviews, the most in Sullivan.
- 5.0★ from 160 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17957 Rosemar Ln, Glencoe, MO 63038
Based in Union, 18 mi away
53/100CR ScoreRanked #3 because of its Google rating and review volume: 4.8★ from 45 Google reviews.
- 4.8★ from 45 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
- Address
- 1673 Old Hwy 50 W, Union, MO 63084
#4 Acculift
Based in Wentzville, 39 mi away
52/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.5★ from 44 Google reviews, listed on Google as “Waterproofing service”.
- 4.5★ from 44 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 653 Foristell Rd, Wentzville, MO 63385
Based in Union, 18 mi away
52/100CR ScoreRanked #5 because of its Google rating and review volume: 5.0★ from 18 Google reviews.
- 5.0★ from 18 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun 12 PM–7 PM
- Address
- 304 Hawthorne Dr, Union, MO 63084
Based in Saint Peters, 35 mi away
52/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
Based in Affton, 26 mi away
51/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Waterproofing service”.
- 4.4★ from 7 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
Based in Union, 19 mi away
50/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.4★ from 14 Google reviews, listed on Google as “Concrete contractor”.
- 4.4★ from 14 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 57 Corporate Dr, Union, MO 63084
Based in Barnhart, 40 mi away
49/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 6 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
Based in Union, 23 mi away
47/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.4★ from 5 Google reviews, listed on Google as “Concrete contractor”.
- 4.4★ from 5 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 733 Del Vista Ct, Villa Ridge, MO 63089
Also serving Sullivan
8 more foundation repair companies within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| B & S Foundations | 29 mi | |
| Beck Concrete Service | In Sullivan | |
| Chip Off the Old Block L.L.C | 38 mi | |
| Hancock Foundations & Flatwork | 5.0★ (2) | 29 mi |
| Havin Material Service Inc | 4.5★ (10) | In Sullivan |
| MACX General LLC | In Sullivan | |
| Solid Rock Foundation & Flatwork LLC | 4.5★ (2) | 40 mi |
| Wiseguy Contracting, LLC | 37 mi |
How much do foundation repair companies cost in Sullivan?
National price ranges in USD, not adjusted for Sullivan. 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 |
How we ranked Sullivan foundation repair companies
We scored 10 Sullivan 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 Sullivan 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 |
Foundation repair companies in Sullivan: frequently asked questions
Who is the best foundation repair company in Sullivan?
By CR Score, the highest-ranked foundation repair company in Sullivan, MO is Quacker's Waterproofing & Basement Repair with a CR Score of 56/100. It has 4.8★ from 59 Google reviews. It is open Saturdays until 5 PM. Rattini Roofing & Exteriors, LLC (#2) and Unerstall Foundations & Flatwork Inc (#3) follow. We ranked 10 foundation repair companies on ten factors, last updated October 22, 2026.
How many foundation repair companies are there in Sullivan?
ContractorsRanked ranks 10 foundation repair companies serving Sullivan, MO. Another 8 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which foundation repair companies in Sullivan are open 24/7?
1 ranked foundation repair company in Sullivan posts 24/7 hours. The highest-ranked is Rattini Roofing & Exteriors, LLC (#2). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Sullivan work on weekends?
4 of 10 ranked foundation repair companies post Saturday hours and 3 post Sunday hours. The highest-ranked open Saturdays are Quacker's Waterproofing & Basement Repair (#1), Rattini Roofing & Exteriors, LLC (#2) and Emmendorfer Exteriors LLC (#5). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Sullivan?
Foundation repair typically costs $2,225 to $8,133, with $5,174 typical (Per project: typical range of customer-reported repairs. US national range). This is a national range, not adjusted for Sullivan. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Sullivan foundation repair companies have?
The median Google rating among 10 rated foundation repair companies in Sullivan is 4.8★, with a median of 16 reviews. Rattini Roofing & Exteriors, LLC has the most, 160 reviews, and ranks #2. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank foundation repair companies?
Each foundation repair company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do foundation repair companies outside Sullivan count in this ranking?
Yes, if they are within 40 mi of the Sullivan city center, our service radius for foundation repair companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Sullivan
- October 2026: CR Scores recalculated for 10 foundation repair companies serving Sullivan.
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