A damp crawlspace, a soft floor or water after heavy rain can leave you wondering who to call first. These five companies advertise crawlspace repair or related moisture and wood-repair services in Spartanburg County communities. Below, you’ll find the branch we checked, its Google review numbers, the work it describes and a few questions worth asking before you book an inspection.
How we chose the order: We checked six existing directory providers and ordered these five by their Google review counts on October 9, 2026. The totals cover each branch’s full range of work, so use them as a starting point alongside the actual repair scope. This is a researched shortlist, not a survey of every contractor in the county. More about the research is below.
At a glance
On a small screen, scroll the comparison sideways to see every column.
| Company and branch | Google reviews | Google rating | Office city |
|---|---|---|---|
| Groundworks Foundation Repair Greenville (formerly Mount Valley) | 659 | 4.6 / 5 | Spartanburg |
| Crawlspace Medic of the Upstate | 593 | 4.9 / 5 | Greenville |
| '58 Foundations & Waterproofing, Spartanburg | 586 | 4.7 / 5 | Spartanburg |
| Thompson Brothers Exterminating and Waterproofing | 469 | 4.9 / 5 | Spartanburg |
| Cantey Foundation Specialists, Roebuck | 385 | 4.6 / 5 | Roebuck |
Branch-specific Google snapshot checked October 9, 2026. The order reflects review volume within the stated research pool.
1. Groundworks Foundation Repair Greenville (formerly Mount Valley)
Google: 4.6 / 5 from 659 reviews. Office: 300 South Ave, Spartanburg, SC 29306.
The Greenville-named branch is physically in Spartanburg. Its official branch page lists crawl-space repair and encapsulation, alongside foundation repair and basement waterproofing. Its named service communities include Spartanburg, Inman, Moore and Woodruff.
Before requesting an estimate: Ask which problems the inspection identified and which parts of the proposal address crawl-space moisture, damaged framing or foundation movement. Those scopes may call for different work.
View the Crawl Space Compass profile · Check current Google reviews · Read the company’s service information
2. Crawlspace Medic of the Upstate
Google: 4.9 / 5 from 593 reviews. Office: 186 Commerce Center, Suite B, Greenville, SC 29615.
This Greenville office explicitly lists Spartanburg and Duncan among its service communities. Its branch page describes crawl-space inspections, encapsulation, waterproofing and structural repairs, including girders, joists and subfloors. The office location and service area are separate facts.
Before requesting an estimate: If floors or framing are part of the concern, request photographs and a written explanation of which members need repair or replacement. Have moisture-control work identified separately.
View the Crawl Space Compass profile · Check current Google reviews · Read the company’s service information
3. '58 Foundations & Waterproofing, Spartanburg
Google: 4.7 / 5 from 586 reviews. Office: 480 Old Greenville Rd, Spartanburg, SC 29301.
The company’s Spartanburg crawl-space page expressly describes work across Spartanburg County. Its South Carolina branch page gives the Spartanburg office address. Its published crawl-space work includes encapsulation and waterproofing; ask the branch to identify the specific repair services needed for your home.
Before requesting an estimate: Request a scope that explains water management, the liner and sealing details, equipment and ongoing maintenance. If there is damaged wood or foundation movement, have that work priced and explained separately.
View the Crawl Space Compass profile · Check current Google reviews · Read the company’s service information
4. Thompson Brothers Exterminating and Waterproofing
Google: 4.9 / 5 from 469 reviews. Office: 1450 Boiling Springs Rd, Spartanburg, SC 29303.
Thompson Brothers’ Spartanburg page names Spartanburg County and communities including Boiling Springs, Inman, Roebuck, Duncan and Woodruff. Its water-damage service page describes repairing damaged wood, joists, rotten floors and subfloors, with encapsulation and waterproofing addressing moisture. The Google count covers its whole business, which also offers pest control.
Before requesting an estimate: Ask which damaged wood needs repair, how the moisture source will be addressed and what is excluded. Its published wood-repair services should not be read as proof that it installs foundation piers or performs every type of structural repair.
View the Crawl Space Compass profile · Check current Google reviews · Read the company’s service information
5. Cantey Foundation Specialists, Roebuck
Google: 4.6 / 5 from 385 reviews. Office: 5951 US-221, Roebuck, SC 29376.
Cantey’s Spartanburg County service page describes crawl-space structural repair and encapsulation. The review count here belongs to its Roebuck Google business profile at 5951 US-221. It excludes review totals from other Cantey offices.
Before requesting an estimate: Ask the inspector to separate structural support recommendations from encapsulation or drainage. Compare the written repair design, included work and follow-up requirements with the other estimates you obtain.
View the Crawl Space Compass profile · Check current Google reviews · Read the company’s service information
Compare crawlspace repair quotes before choosing
Compare the Repair Plan, Not Just the Price
- Evidence: What was found, where, and in which photos or readings?
- Repair scope: Which work addresses moisture, water entry, or structural damage?
- Included work: Who handles access, removal, cleanup, permits, and specialist work?
- Materials & drainage: Which products and equipment? Where will collected water go?
- Written terms: Total cost, payment stages, change approval, and warranty conditions.
- Completion check: What records, inspections, maintenance, and follow-up will you receive?
Ask each company the same questions. Record exclusions. Resolve differences in writing.
For more detail, use our crawl space quote comparison guide.
These comparison questions draw on FTC contractor-hiring guidance, the FTC’s written-contract checklist, and DOE/PNNL guidance on crawl-space assessment and drainage verification.
Comparing crawlspace repair companies in Spartanburg County
Whether you’re in Spartanburg, Boiling Springs, Duncan or Woodruff, start with the problem you need solved. Tell the company what you’ve noticed: when water appears, which floor feels soft, whether an odor changes after rain or whether an existing liner is damaged. Photos taken from a safe, accessible spot and previous repair paperwork can help the inspector understand the history.
Then ask each company to explain what it found and show you photographs. A quote for a liner and dehumidifier may cover very different work from one that includes drainage or replacing damaged wood. Comparing the total price alone can hide those differences.
- Water and moisture: Ask how the proposal handles standing water, drainage, humidity and the ground vapor barrier. Have the proposed discharge location and maintenance requirements explained.
- Framing and support: If a proposal includes joists, girders, subfloors or support posts, ask which components are affected and how the repair will be specified.
- Encapsulation: Compare liner coverage, seams, wall attachment, penetrations, access and any dehumidifier or sump equipment. Similar package names can describe different scopes.
- Inspection access: Explain access limitations before the visit. Request documentation of areas the inspector could not safely examine.
- Paperwork: Ask about applicable credentials, insurance, permits, exclusions and warranty terms for the exact work. Have the contractor identify the permit office for your address and who will handle any required application. Read the written terms rather than assuming a company-wide promise applies.
Our crawl-space quote comparison guide provides a more detailed checklist. For more options, use the full contractor search. You can also browse the Spartanburg County contractor directory and the crawl-space repair overview. If you’re preparing for a visit, start with the crawl-space inspection checklist.
Local checks before approving crawlspace repair in Spartanburg County
Check the permit office for your address
Before approving the work, ask which local office handles your property and whether the proposed repairs need permits or inspections. The City of Spartanburg publishes its own residential-building guidance and lists Building Inspections at 864-596-2041. Spartanburg County Building Codes can be reached at 864-596-2727. Give the office your address and the actual scope, including proposed framing repairs, drainage and equipment work, so you get an answer for your project.
Compare all the trades in the proposal
A crawlspace quote can involve more than the liner or wood repair. Spartanburg County’s residential-permitting page lists building, electrical, plumbing and mechanical permits among the possible permit types. Ask the contractor who will perform each part, who will obtain any required permits and what inspection records you will receive. Include those responsibilities in the written quote.
Check credentials against the work being offered
Ask for the legal contracting name and applicable South Carolina license or registration numbers. Use the Licensee Lookup linked from the South Carolina Residential Builders Commission to check the current record. If the classification does not clearly match the proposed work, ask the Commission or permitting office before signing. A Google rating does not verify licensing, insurance or permit status.
Questions homeowners ask
Does the company with the most reviews provide the best repair?
Review volume helps show how much public feedback exists for a particular business profile. It does not establish that the company is the best match for your repair. Read recent reviews about similar work, inspect the written scope and compare more than one estimate.
Why does a Greenville company appear in a Spartanburg County list?
An office address and a service area are different. Crawlspace Medic’s Greenville branch expressly names Spartanburg and Duncan in its published service area. Groundworks calls its location the Greenville branch while listing its office at 300 South Ave in Spartanburg. Confirm your address with the provider.
Is encapsulation the same as structural crawlspace repair?
Encapsulation concerns sealing and moisture management. A proposal for damaged framing or structural support has a different scope. Ask the inspector to explain which problem each item addresses and who will perform any structural work.
Why are Google and Yelp reviews not combined?
The platforms have different users and review systems. Adding their totals could count the same customer twice, and averaging their stars would create a rating neither platform published. This edition uses directly checked Google branch totals only.
How we researched this shortlist
Our core comparison covered Groundworks’ Greenville branch, Crawlspace Medic of the Upstate, ’58 Foundations’ Spartanburg branch, Thompson Brothers, Cantey’s Roebuck branch and JHS Crawlspace Specialist. We matched Google profiles to business names, office details and official websites rather than combining reviews from different offices. Google stars are shown separately from the counts that determine the order.
Some providers work from offices outside Spartanburg County. Published service in Spartanburg or Duncan is useful evidence for those communities, but every company still needs to confirm your address and repair type. We have not treated a nearby office as proof of whole-county service.
JHS Crawlspace Specialist was also directly checked at 5.0 stars from 78 Google reviews, placing it below the five listed here by review count within the core research pool. Its directory profile remains available. Additional businesses surfaced during research, including providers whose local service scope or platform identity still needs confirmation. They should not be treated as unavailable or lower quality because they are absent from this first comparison.
Yelp totals were not verified for this edition and were not added to Google counts. Company information and review snapshots were checked October 9, 2026. Availability, services and platform totals can change. Use the linked provider pages and current review profiles to confirm details before hiring.