Crawl Space Cost Calculator: Estimate Encapsulation & Repair Costs

Use this quick estimator to get a ballpark price range for a crawl space encapsulation or vapor barrier project before you call contractors. Enter your crawl space square footage, choose how much of a moisture problem you're dealing with, pick the scope of work, and add any drainage or dehumidification you expect to need. The tool returns a low-to-high dollar range based on typical 2026 U.S. rates. It runs entirely in your browser — nothing you enter is stored or sent anywhere. Treat the result as an estimate only, not a quote: real pricing depends on access, clearance, existing damage and local labor, so always get at least three quotes from licensed local pros.

How the estimate works

The calculator starts from a base encapsulation rate of roughly $3–$7 per square foot for a full system, or about $1–$3 per square foot for a vapor barrier only, then applies a moisture factor because wetter crawl spaces need more prep, drainage and drying before any liner goes down. Optional line items — a crawl space dehumidifier and a drainage or sump system — are added on top because they are usually priced separately by contractors. For a deeper breakdown of what drives the price, see the crawl space encapsulation cost guide and the crawl space repair cost guide.