Crawl space dehumidifiers in Charleston, SC
A crawl space dehumidifier pulls moisture out of a sealed crawl space and drains it away. It is a standard part of most encapsulations in humid climates and can be added to an existing sealed space.
What it costs
| Item | Published range | Source |
|---|---|---|
| Dehumidifier, installed | $1,000–$3,000 | HomeGuide, How Much Does Crawl Space Encapsulation Cost? (Jan 14, 2026) |
| Dehumidifier unit (equipment) | $800–$1,200 | Angi, How Much Does Crawl Space Encapsulation Cost? (updated Oct 28, 2026) |
| Whole-house dehumidifier, installed | $1,500–$3,500 | HomeGuide, How Much Does Crawl Space Encapsulation Cost? (Jan 14, 2026) |
Ask about
- The unit's capacity and why it fits your square footage
- Where it drains (condensate line or pump)
- Filter changes and who services it
- Whether it needs a new electrical outlet (which may need an electrician and permit)
Crawl space dehumidifiers FAQ
Can I put any dehumidifier in my crawl space?
Crawl space units are built for low, damp spaces and to drain continuously. Household portable units usually aren't designed for that. Ask your pro which model and why.
How do I know it's working?
Many pros add a humidity monitor you can read from upstairs or a phone. Ask what humidity level they set it to hold.
Where we can match you
Crawl space dehumidifiers requests are accepted across the Charleston area:
Downtown CharlestonWest AshleyJames IslandJohns IslandMount PleasantDaniel IslandNorth CharlestonSummervilleGoose CreekHanahanLadsonMoncks CornerIsle of PalmsFolly BeachKiawah IslandSullivan's Island
Related services
Crawl space encapsulationSeal the crawl space with a heavy liner, closed vents and controlled humidity.Vapor barrier installationReplace torn or thin plastic with a sealed ground barrier.Crawl space repairSagging floors, rotted joists, beams and sill plates.Drainage & sump pumpsFor crawl spaces that hold water after rain.Crawl space insulationWall or subfloor insulation that tolerates moisture.Crawl space mold remediationClean and treat mold before sealing the space.
Referral service disclosure. Charleston Crawl Space Quotes is not a contractor. We pass your request to an independent local pro who may pay us a referral fee if you hire them. That never costs you anything extra, and you are never obligated to hire anyone. Full disclosure.