CRAWL SPACE
How Much Does Crawl Space Encapsulation Cost?
Estimate crawl space encapsulation cost per square foot — vapor barrier, prep and labor — with the free calculator.
A damp crawl space causes mold, odors, pests and higher energy bills. Encapsulation seals the ground and keeps the space dry. This guide covers the cost per square foot and a calculator to budget the job.
THE SHORT ANSWER
The short answer
Crawl space encapsulation runs $1,500–$15,000 depending on size. The vapor barrier alone is $0.50–$1.50 per sq ft; prep, drainage and dehumidifiers add the rest. Most homes spend $5–$10 per sq ft installed.
Barrier and costs
A heavy 20-mil polyethylene barrier is the standard for floors — it stops ground moisture and pests. Coatings work on walls. Most pros recommend both. The barrier itself runs $0.50-$1.50 per sq ft.
- Vapor barrier: $0.50–$1.50 per sq ft
- Wall coating: $1–$3 per sq ft
- Drainage: $1,500–$4,000
- Dehumidifier: $800–$1,500
Prep is where the cost lives
Cleaning debris, removing pests, repairing drainage and leveling the ground are most of the labor. A messy crawl space with standing water costs far more than a clean one.
Do I need a dehumidifier?
Encapsulation alone doesn't control air moisture. A dehumidifier keeps the space dry year-round and protects the wood floor system. It adds $800-$1,500 to the project.
Try the calculator with your crawl space
Enter the area, vapor barrier price per sq ft and prep + labor per sq ft to see the total.