Crawl space encapsulation & repair in Sullivan's Island, SC
Request free quotes for crawl space encapsulation, vapor barriers, dehumidifiers and crawl space repair in Sullivan's Island (Charleston County, ZIP 29482). We match you with one vetted local pro. Free, no obligation.
Crawl spaces in Sullivan's Island
Many island homes are raised on pilings and have open or enclosed areas below rather than a classic crawl space. If your home is in a FEMA flood zone, rules limit what can be enclosed below the lowest floor, so ask the pro and your town's floodplain or building office before enclosing or sealing a space under an elevated home.
Typical prices
| Item | Published range | Source |
|---|---|---|
| Full encapsulation, Charleston installer range | $4,500–$12,000 | Fortress Moisture Seal Charleston, crawl space encapsulation page |
| Full encapsulation, national average | $5,500 | Angi, How Much Does Crawl Space Encapsulation Cost? (updated Oct 28, 2026) |
| Ground vapor barrier, 1,500 sq ft | about $1,050–$2,100 | Coastal Crawlspaces (Charleston installer), published price list |
| Dehumidifier, installed | $1,000–$3,000 | HomeGuide, How Much Does Crawl Space Encapsulation Cost? (Jan 14, 2026) |
| Crawl space repair | $1,500–$15,000 | Angi, How Much Does Crawl Space Encapsulation Cost? (updated Oct 28, 2026) |
Prices are published ranges, not a quote. See the full cost guide.
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