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The 10 Best Basement Waterproofing Companies in Charleston (2026)
This list ranks the top basement waterproofing options for Charleston-area homeowners using a Google-review–based method, updated for 2026. We order businesses by a Bayesian-style score that balances average rating with review volume, so a highly rated shop with many reviews ranks higher than a tiny sample with the same score. Charleston’s low-lying geography and older housing stock make moisture control and crawlspace work common concerns, so we focus on firms visible in local search results and with meaningful customer feedback. Read on for concise notes on each company to help you narrow your options.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Lowcountry Foundation and Crawl Space Repair
Lowcountry Foundation and Crawl Space Repair tops the list because it has a perfect 5.0 Google rating backed by a large review count (660), which gives it strong weight in a review-driven ranking. The Google category lists it as a concrete contractor, and the business name indicates a focus on foundation and crawl-space work. Those combined factors — an ideal average and substantial review volume — push it to number one in this dataset.
The full ranking
Crawlspace Medic of Charleston
A 5.0-rated Waterproofing service with 253 Google reviews, shown at 800 Johnnie Dodds Blvd in Mt Pleasant for local visibility in that community.
253 reviews
All Pro Crawlspace Solutions
This entry holds a 5.0 rating across 172 reviews and appears under the Contractor category; the address on Park West Blvd places it in the Park West area of Mt Pleasant.
172 reviews
Charleston Crawlspaces
A Waterproofing service with a perfect 5.0 rating based on 85 Google reviews; no street address is shown in the provided data.
85 reviews
Charlestowne Crawlspace
Listed as a Waterproofing service with a 5.0 rating from 50 reviews and an address in Charleston (3416 Uncle Micahs Wy, Charleston, SC 29414).
50 reviews
Hammes Services, LLC
Shows a 5.0 Google rating with 24 reviews and is categorized as a Construction company, with an address on Wadmalaw Island (2324 Midge Rd).
24 reviews
Palmetto Crawlspace
A Waterproofing service rated 5.0 from 23 reviews, located at 306 Buncum Dr in Mt Pleasant according to the listing.
23 reviews
Carolina Basement Systems
Recorded at a 4.9 average across 1,317 Google reviews and listed as a Waterproofing service; no specific street address is provided in the data.
1317 reviews
Lowcountry Foundation and Crawl Space Repair
Also appears again with a 4.9 rating from 1,172 reviews under the Waterproofing service category, with an address in Rincon, GA (145 Commercial Ct).
1172 reviews
RhinoLift Foundation Solutions
A Foundation specialty business with a 5.0 rating based on 20 Google reviews, shown at 1941 Savage Rd suite 500-b in Charleston (29407).
20 reviews
Frequently asked questions
How should I choose a basement waterproofing company?
Compare companies by verified customer reviews, the number of reviews, and the listed Google category (for example, waterproofing service vs. general contractor). Also ask for written estimates, warranties, and referrals, and check for appropriate licensing and insurance before signing any contract.
What typically affects the cost of basement waterproofing?
Cost depends on the scope of the problem (interior vs. exterior work), square footage, foundation type, and whether structural repairs are needed. Geographic factors, access to the work area, and required permits also influence the final price.
What should I check before hiring a contractor for crawlspace or basement work?
Confirm insurance and relevant licenses, request a written scope and timeline, and ask for references or recent project photos. Make sure any promised moisture-control strategies and warranties are documented in writing.
How was this ranking compiled?
The list is based on Google review data and uses a weighting method that balances average rating with review volume, updated for 2026. That approach rewards businesses with both high scores and a meaningful number of reviews rather than very small sample sizes.