59/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 265 Google reviews.
- 5.0★ from 265 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9390 Veterans Memorial Pkwy, O'Fallon, MO 63366
Best Foundation Repair Companies in Union, MO (2026)
50 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union: Home Shield Foundation Repair, CR Score 59/100; 5.0★ from 265 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Acculevel, posts 24/7 hours; ranked #3 of 50.
- 28
Most-reviewed: Koala Insulation of Gateway West & Metro East IL, 528 Google reviews at 4.9★, the most of 50 ranked; ranked #28.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
50 Union foundation repair companies are ranked here by CR Score, from ten published factors. 4 are open 24/7, 21 open Saturdays and 8 open Sundays, based on posted hours. The median Google rating is 4.9★ across 50 rated businesses.
Top 10 foundation repair companies in Union at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Home Shield Foundation Repair | 59 | 5.0★ (265) | O'Fallon, 29 mi away | 24/7 | Overall |
| 2 | St. Louis Foundation Repairs | 58 | 5.0★ (8) | Union | Sat · Sun | — |
| 3 | Acculevel | 58 | 4.8★ (24) | Chesterfield, 26 mi away | 24/7 | Emergencies |
| 4 | Perma Jack of St. Louis | 57 | 4.9★ (311) | Manchester, 30 mi away | — | — |
| 5 | Quacker's Waterproofing & Basement Repair | 57 | 4.8★ (59) | Saint Peters, 18 mi away | Sat | — |
| 6 | Helitech Waterproofing & Foundation Repair | 57 | 4.6★ (168) | Affton, 27 mi away | Sat | — |
| 7 | Rattini Roofing & Exteriors, LLC | 57 | 5.0★ (160) | Chesterfield, 22 mi away | 24/7 | — |
| 8 | Crackstoppers Foundation Repair & Waterproofing | 56 | 5.0★ (26) | Saint Charles, 31 mi away | Sat · Sun · Evenings | — |
| 9 | Crawlspace Medic of St. Louis | 56 | 4.8★ (128) | St. Louis, 38 mi away | Sat · Evenings | — |
| 10 | Ram Jack St. Louis | 56 | 4.8★ (202) | Arnold, 34 mi away | Evenings | — |
The 50 best foundation repair companies in Union, 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 Union
58/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 8 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat 8 AM–4 PM · Sun 9 AM–4 PM
#3 Acculevel
Based in Chesterfield, 26 mi away
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 24 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 24 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 100 Chesterfield Business Pkwy Ste 255, Chesterfield, MO 63005
Based in Manchester, 30 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.9★ from 311 Google reviews, listed on Google as “Waterproofing service”.
- 4.9★ from 311 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 1127 Country Stone Dr, Manchester, MO 63088
Based in Saint Peters, 18 mi away
57/100CR ScoreRanked #5 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
Based in Affton, 27 mi away
57/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.6★ from 168 Google reviews, listed on Google as “Waterproofing service”.
- 4.6★ from 168 Google reviews
- Hours
- Mon–Fri 7:30 AM–5:30 PM · Sat 8 AM–4 PM · Sun closed
Based in Chesterfield, 22 mi away
57/100CR ScoreRanked #7 because of its Google rating and review volume: 5.0★ from 160 Google reviews.
- 5.0★ from 160 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17957 Rosemar Ln, Glencoe, MO 63038
Based in Saint Charles, 31 mi away
56/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 26 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat 8 AM–6 PM · Sun 9 AM–3 PM
- Address
- 62 Spring Trail Ct, St Charles, MO 63303
Based in St. Louis, 38 mi away
56/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 128 Google reviews
- Hours
- Mon–Sat 8 AM–6:30 PM · Sun closed
- Address
- 8204 Exchange Way, St. Louis, MO 63144
Based in Arnold, 34 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.8★ from 202 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 202 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat–Sun closed
- Address
- 1000 Fox Chase Industrial Dr, Arnold, MO 63010
Based in Saint Peters, 28 mi away
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 72 Google reviews, listed on Google as “Waterproofing service”.
- 4.9★ from 72 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat–Sun closed
- Address
- 5377 State Rte N Ste 479, Cottleville, MO 63304
Based in Eureka, 27 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Waterproofing service”.
- 4.9★ from 80 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
- Address
- 2103 Penta Dr, High Ridge, MO 63049
Based in Union
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 45 Google reviews, listed on Google as “Concrete contractor”.
- 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
#14 Crack Doctor STL
Based in Saint Peters, 18 mi away
54/100CR ScoreRanked #14 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 Union
54/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Roofing contractor”.
- 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 Chesterfield, 26 mi away
54/100CR ScoreRanked #16 because of its Google rating and review volume: 4.9★ from 324 Google reviews.
- 4.9★ from 324 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat 9 AM–12 PM · Sun closed
- Address
- 17600 Chesterfield Airport Rd Suite 203, Chesterfield, MO 63005
Based in Murphy, 31 mi away
54/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 93 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 93 Google reviews
- Hours
- Mon–Thu 9 AM–3 PM · Fri–Sun closed
- Address
- 524 Gravois Rd, Fenton, MO 63026
Based in St. Louis, 37 mi away
54/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 32 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–1 PM · Sun closed
- Address
- 7038 Grassy Valley Dr, St. Louis, MO 63129
#19 Acculift
Based in Wentzville, 20 mi away
54/100CR ScoreRanked #19 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 O'Fallon, 25 mi away
53/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 8 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
- Address
- 9 Mingo Ln, O'Fallon, MO 63367
Based in Murphy, 31 mi away
52/100CR ScoreRanked #21 because of its Google rating and trade focus: 1.3★ from 4 Google reviews, listed on Google as “Waterproofing service”.
- 1.3★ from 4 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 476 Old Smizer Mill Rd, Fenton, MO 63026
Based in Saint Charles, 39 mi away
52/100CR ScoreRanked #22 because of its Google rating and review volume: 5.0★ from 304 Google reviews.
- 5.0★ from 304 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 9 AM–12 PM · Sun closed
- Address
- 100 Hawning Rd Unit C, St Charles, MO 63301
Based in Eureka, 28 mi away
52/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 21 Google reviews
- Hours
- Mon–Fri 8 AM–3 PM · Sat–Sun closed
- Address
- 2451 N Lark Dr, Fenton, MO 63026
Based in St. Louis, 39 mi away
51/100CR ScoreRanked #24 because of its Google rating and review volume: 4.9★ from 355 Google reviews.
- 4.9★ from 355 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat 10 AM–12 PM · Sun closed
- Address
- 2619 S Big Bend Blvd, St. Louis, MO 63143
Based in Union
51/100CR ScoreRanked #25 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
All 50 foundation repair companies
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.
Also serving Union
20 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 |
|---|---|---|
| Chip Off the Old Block L.L.C | 25 mi | |
| Craig & Son Concrete, LLC | 28 mi | |
| Eagle Eye Exteriors | 5.0★ (1) | 30 mi |
| EverPour Foundation | 36 mi | |
| Frontline Home Solutions | 26 mi | |
| Jet Foundation Repair | 33 mi | |
| Kent Foundation Repair | 31 mi | |
| MACX General LLC | 10 mi | |
| Merchant Basement Waterproofing and Foundation Repair | 31 mi | |
| NG Foundation Repair of St. Louis | 32 mi | |
| Painting & Decorating Foundation | 3.0★ (2) | 37 mi |
| Quality Waterproofing - Foundation Repair | 28 mi | |
| Roof Experts | 5.0★ (1) | 34 mi |
| SERVPRO of Franklin County | 4.8★ (88) | In Union |
| Solid Rock Foundation & Flatwork LLC | 4.5★ (2) | 22 mi |
| Steve Baumstark Roofing LLC | 5.0★ (2) | 30 mi |
| T & H Foundations LLC | 1.0★ (1) | 35 mi |
| Tri-County Waterproofing Inc | 5.0★ (2) | 30 mi |
| Wiseguy Contracting, LLC | 30 mi | |
| Xpert Group Contracting | 29 mi |
How much do foundation repair companies cost in Union?
National price ranges in USD, not adjusted for Union. 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 Union foundation repair companies
We scored 50 Union 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 Union 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 Union: frequently asked questions
Who is the best foundation repair company in Union?
By CR Score, the highest-ranked foundation repair company in Union, MO is Home Shield Foundation Repair with a CR Score of 59/100. It has 5.0★ from 265 Google reviews. It is open 24/7. St. Louis Foundation Repairs (#2) and Acculevel (#3) follow. We ranked 50 foundation repair companies on ten factors, last updated October 22, 2026.
How many foundation repair companies are there in Union?
ContractorsRanked ranks 50 foundation repair companies serving Union, MO. 5 of them are based in Union; the rest serve it from nearby towns. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which foundation repair companies in Union are open 24/7?
4 ranked foundation repair companies in Union post 24/7 hours. The highest-ranked are Home Shield Foundation Repair (#1), Acculevel (#3) and Rattini Roofing & Exteriors, LLC (#7). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which foundation repair companies in Union work on weekends?
21 of 50 ranked foundation repair companies post Saturday hours and 8 post Sunday hours. The highest-ranked open Saturdays are Home Shield Foundation Repair (#1), St. Louis Foundation Repairs (#2) and Acculevel (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does foundation repair cost in Union?
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 Union. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Union foundation repair companies have?
The median Google rating among 50 rated foundation repair companies in Union is 4.9★, with a median of 25 reviews. Koala Insulation of Gateway West & Metro East IL has the most, 528 reviews, and ranks #28. 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 Union count in this ranking?
Yes, if they are within 40 mi of the Union 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 Union
- October 2026: CR Scores recalculated for 50 foundation repair companies serving Union.
More foundation repair companies and Union pages
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