62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 527 Google reviews, the most in Union.
- 4.8★ from 527 Google reviews
- Hours
- Mon–Fri 8 AM–12 AM · Sat–Sun 9 AM–12 AM
- Address
- 480 Old Greenville Rd, Spartanburg, SC 29301
Best Foundation Repair Companies in Union, SC (2026)
32 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union: '58 Foundations & Waterproofing, CR Score 62/100; 4.8★ from 527 Google reviews; open 7 days a week.
- 6
Best for emergencies (open 24/7): Alpha Air Heating and Cooling, posts 24/7 hours; ranked #6 of 32.
- 4
Most-reviewed: Mount Valley Foundation Services, 509 Google reviews at 4.6★, the most of 32 ranked after '58 Foundations & Waterproofing; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
32 Union foundation repair companies are ranked here by CR Score, from ten published factors. 6 are open 24/7, 19 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.9★ across 32 rated businesses.
Top 10 foundation repair companies in Union at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | '58 Foundations & Waterproofing | 62 | 4.8★ (527) | Spartanburg, 27 mi away | Sat · Sun · Evenings | Overall |
| 2 | Crawlspace Medic of the Upstate | 59 | 4.9★ (478) | Greenville, 39 mi away | Sat · Evenings | — |
| 3 | JHS Crawlspace Specialist | 58 | 5.0★ (48) | Spartanburg, 27 mi away | Sat · Sun · Evenings | — |
| 4 | Mount Valley Foundation Services | 58 | 4.6★ (509) | Spartanburg, 22 mi away | Sat · Sun · Evenings | Most reviews |
| 5 | EnergySmith Home Performance | 57 | 4.8★ (90) | Simpsonville, 31 mi away | Sat · Sun | — |
| 6 | Alpha Air Heating and Cooling | 56 | 5.0★ (482) | Rock Hill, 40 mi away | 24/7 | Emergencies |
| 7 | All-Dry of the Carolinas | 55 | 4.6★ (98) | Clinton, 24 mi away | — | — |
| 8 | Crawl Space Brothers | 54 | 4.9★ (210) | Greenville, 38 mi away | 24/7 | — |
| 9 | Cantey Foundation Specialists | 54 | 4.6★ (350) | Greer, 22 mi away | — | — |
| 10 | Rehab Restoration | 53 | 4.7★ (111) | Greer, 32 mi away | 24/7 | — |
The 32 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 Greenville, 39 mi away
59/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 478 Google reviews, listed on Google as “Waterproofing service”.
- 4.9★ from 478 Google reviews
- Hours
- Mon–Sat 8 AM–6:30 PM · Sun closed
- Address
- 1200 Woodruff Rd C-7, Greenville, SC 29607
Based in Spartanburg, 27 mi away
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 48 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 48 Google reviews
- Hours
- Mon–Sat 7 AM–9 PM · Sun 12 PM–5 PM
- Address
- 308 Milhaven Dr, Spartanburg, SC 29301
Based in Spartanburg, 22 mi away
58/100CR ScoreRanked #4 because of its Google rating and review volume: 4.6★ from 509 Google reviews.
- 4.6★ from 509 Google reviews
- Hours
- Mon–Fri 7 AM–11 PM · Sat 8 AM–11 PM · Sun 10 AM–11 PM
- Address
- 300 South Ave, Spartanburg, SC 29306
Based in Simpsonville, 31 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.8★ from 90 Google reviews, listed on Google as “Waterproofing service”.
- 4.8★ from 90 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat 10 AM–2 PM · Sun 9 AM–5 PM
- Address
- 104 Riverfront Ln, Simpsonville, SC 29681
Based in Rock Hill, 40 mi away
56/100CR ScoreRanked #6 because of its Google rating and review volume: 5.0★ from 482 Google reviews.
- 5.0★ from 482 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2443 Cherry Rd, Rock Hill, SC 29732
Based in Clinton, 24 mi away
55/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 98 Google reviews, listed on Google as “Waterproofing service”.
- 4.6★ from 98 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
Based in Greenville, 38 mi away
54/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 210 Google reviews.
- 4.9★ from 210 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1200 Woodruff Rd Unit G-25, Greenville, SC 29607
Based in Greer, 22 mi away
54/100CR ScoreRanked #9 because of its Google rating and review volume: 4.6★ from 350 Google reviews.
- 4.6★ from 350 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
- Address
- 5951 US-221, Roebuck, SC 29376
Based in Greer, 32 mi away
53/100CR ScoreRanked #10 because of its Google rating and review volume: 4.7★ from 111 Google reviews.
- 4.7★ from 111 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 425 Journey Way Ln, Greer, SC 29651
Based in Spartanburg, 26 mi away
53/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 14 Google reviews, listed on Google as “Concrete contractor”.
- 4.9★ from 14 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6301 Cannons Campground Rd A, Cowpens, SC 29330
Based in Wade Hampton, 38 mi away
52/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Waterproofing service”.
- 5.0★ from 9 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
Based in Spartanburg, 27 mi away
52/100CR ScoreRanked #13 because of its Google rating and review volume: 4.9★ from 435 Google reviews.
- 4.9★ from 435 Google reviews
- Hours
- Mon–Fri 7:30 AM–5:30 PM · Sat–Sun closed
- Address
- 1450 Boiling Springs Rd, Spartanburg, SC 29303
Based in Rock Hill, 37 mi away
51/100CR ScoreRanked #14 because of its Google rating and review volume: 4.9★ from 41 Google reviews.
- 4.9★ from 41 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 123 N Stonewall St, Rock Hill, SC 29730
Based in Rock Hill, 38 mi away
51/100CR ScoreRanked #15 because of its Google rating and review volume: 4.9★ from 184 Google reviews.
- 4.9★ from 184 Google reviews
- Hours
- Mon–Fri 7:30 AM–6 PM · Sat 8 AM–4 PM · Sun closed
- Address
- 1168 Cherry Rd, Rock Hill, SC 29732
Based in Anderson, 28 mi away
50/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 17 Google reviews, open 24/7.
- 5.0★ from 17 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Simpsonville, 36 mi away
50/100CR ScoreRanked #17 because of its Google rating and review volume: 4.9★ from 132 Google reviews.
- 4.9★ from 132 Google reviews
- Hours
- Mon closed · Tue 9 AM–8 PM · Wed 9 AM–6 PM · Thu–Fri 9 AM–8 PM · Sat 9 AM–4 PM · Sun closed
- Address
- 421 N Main St, Simpsonville, SC 29681
Based in Stallings, 39 mi away
49/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.1★ from 53 Google reviews, listed on Google as “Waterproofing service”.
- 4.1★ from 53 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
#19 Cannon Roofing
Based in Spartanburg, 26 mi away
49/100CR ScoreRanked #19 because of its Google rating and review volume: 4.9★ from 70 Google reviews.
- 4.9★ from 70 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
- Address
- 283 Vintage Dr, Spartanburg, SC 29307
Based in Shelby, 37 mi away
49/100CR ScoreRanked #20 because of its Google rating and review volume: 4.5★ from 199 Google reviews.
- 4.5★ from 199 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- 201 N Main St, Shelby, NC 28152
Based in Laurens, 25 mi away
48/100CR ScoreRanked #21 because of its Google rating and review volume: 4.8★ from 25 Google reviews.
- 4.8★ from 25 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–2 PM · Sun closed
- Address
- 58 Larchmont Rd, Laurens, SC 29360
Based in Greenville, 31 mi away
48/100CR ScoreRanked #22 because of its Google rating and review volume: 5.0★ from 29 Google reviews.
- 5.0★ from 29 Google reviews
- Hours
- Mon 8 AM–5 PM · Tue 8 AM–5:30 PM · Wed 8 AM–5 PM · Thu 8 AM–5:30 PM · Fri 8 AM–5 PM · Sat 7 AM–5 PM · Sun closed
Based in Spartanburg, 18 mi away
47/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.4★ from 8 Google reviews, listed on Google as “Concrete contractor”.
- 4.4★ from 8 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 950 W Rd, Spartanburg, SC 29306
Based in Gantt, 37 mi away
47/100CR ScoreRanked #24 because of its Google rating and review volume: 4.8★ from 45 Google reviews.
- 4.8★ from 45 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
Based in Greenville, 38 mi away
47/100CR ScoreRanked #25 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–Fri 8 AM–4 PM · Sat–Sun closed
- Address
- 1200 Woodruff Rd, Greenville, SC 29607
All 32 foundation repair companies
#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 | Solution Foundations | 46 | 5.0★ (3) | 30 mi |
| 27 | Palmetto Waterproofing LLC | 45 | 5.0★ (3) | 37 mi |
| 28 | M.M.I. Moisture, Mold, Insulation | 45 | 5.0★ (8) | 32 mi |
| 29 | WNC Roofing - Commercial Roofing Contractors | 45 | 5.0★ (10) | 25 mi |
| 30 | Uneven Floor Solutions LLC | 44 | 5.0★ (7) | 24 mi |
| 31 | True South Landscaping | 42 | 4.4★ (7) | 38 mi |
| 32 | Allen's Concrete Finishing | 41 | 4.0★ (4) | 35 mi |
Also serving Union
11 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 |
|---|---|---|
| AP Concrete Slab Foundation & Quality Concrete Driveway Service | 39 mi | |
| Don Foster's Construction | 5.0★ (5) | In Union |
| Foundations Unlimited LLC | 39 mi | |
| Golden Key Construction | 5.0★ (13) | In Union |
| Home Free Home Inspection LLC | 5.0★ (1) | 32 mi |
| Johnston Foundation Repair | 3.0★ (2) | 39 mi |
| Koala Insulation of Spartanburg | 5.0★ (2) | 24 mi |
| Lamar Foam Insulation | 5.0★ (1) | 39 mi |
| Mays Contracting Company LLC | 32 mi | |
| Sentry Construction | 1.0★ (1) | 36 mi |
| Solution Foundations | 27 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 32 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, SC is '58 Foundations & Waterproofing with a CR Score of 62/100. It has 4.8★ from 527 Google reviews. It is open 7 days a week. Crawlspace Medic of the Upstate (#2) and JHS Crawlspace Specialist (#3) follow. We ranked 32 foundation repair companies on ten factors, last updated October 22, 2026.
How many foundation repair companies are there in Union?
ContractorsRanked ranks 32 foundation repair companies serving Union, SC. Another 11 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?
6 ranked foundation repair companies in Union post 24/7 hours. The highest-ranked are Alpha Air Heating and Cooling (#6), Crawl Space Brothers (#8) and Rehab Restoration (#10). 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?
19 of 32 ranked foundation repair companies post Saturday hours and 11 post Sunday hours. The highest-ranked open Saturdays are '58 Foundations & Waterproofing (#1), Crawlspace Medic of the Upstate (#2) and JHS Crawlspace Specialist (#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 32 rated foundation repair companies in Union is 4.9★, with a median of 47 reviews. '58 Foundations & Waterproofing has the most, 527 reviews, and ranks #1. 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 32 foundation repair companies serving Union.
More foundation repair companies and Union pages
Foundation repair companies near Union
- Foundation repair companies in Clinton, SC38 ranked
- Foundation repair companies in Chester, SC35 ranked
- Foundation repair companies in Spartanburg, SC51 ranked
- Foundation repair companies in Gaffney, SC43 ranked
- Foundation repair companies in Laurens, SC46 ranked
- Foundation repair companies in Valley Falls, SC52 ranked
- Foundation repair companies in York, SC94 ranked
- Foundation repair companies in Newberry, SC15 ranked
- Foundation repair companies in Boiling Springs, SC53 ranked
- Foundation repair companies in Fountain Inn, SC49 ranked
Other trades in Union
- Roofers in Union203 ranked
- Plumbers in Union44 ranked
- Electricians in Union24 ranked
- HVAC contractors in Union45 ranked
- General contractors in Union32 ranked
- Kitchen remodelers in Union15 ranked
- Bathroom remodelers in Union14 ranked
- Flooring contractors in Union21 ranked
- Concrete contractors in Union26 ranked
- Fence contractors in Union13 ranked
- Deck builders in Union9 ranked
- Siding contractors in Union70 ranked
- Window installers in Union56 ranked
- Gutter installers in Union10 ranked
- Insulation contractors in Union8 ranked
- Solar installers in Union11 ranked
- Tree services in Union24 ranked
- Water damage restoration companies in Union89 ranked
- Home builders in Union157 ranked
- All contractors in Union