- Crawl space encapsulation usually costs $1,500 to $15,000, about $5,500 typical.
- Sealing a crawl space with a heavy vapor barrier, sealed vents and usually a dehumidifier.
- Price your own job with the calculator above; it breaks the job into lines.
What crawl space encapsulation costs
Expect crawl space encapsulation to cost between $1,500 and $15,000, with $5,500 as a typical figure. Sealing a crawl space with a heavy vapor barrier, sealed vents and usually a dehumidifier.
| Price | |
|---|---|
| Low end | $1,500 |
| Typical | $5,500 |
| High end | $15,000 |
National figures from Fixr, HomeAdvisor and Bob Vila, combined as shown below. Labor rates move the price by state: about $6,769 typical in Hawaii against $4,742 in Arkansas.
What drives the price
- Size. This Old House puts basic encapsulation at $3 to $7 a square foot, and up to $10 with extensive prep.
- Condition. Standing water, mold and old insulation have to be dealt with first.
- Barrier thickness. Thicker liners cost more and stand up to foot traffic.
- Dehumidifier and drainage. A dehumidifier and sump pump add to the price.
Extra costs to plan for
| Item | Price | Source |
|---|---|---|
| Mold inspection and foundation repair, if needed | $150 to $15,000 | HomeAdvisor |
Not every quote includes these. Check each line before comparing crawl space encapsulation bids.
Crawl space encapsulation cost by state
Estimates by state, made by Koira: the national crawl space encapsulation range with its labor part, roughly 60%, adjusted to local wages for construction and extraction workers. Real quotes vary with the job.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $1,323 | $4,850 | $13,227 |
| Alaska | $1,743 | $6,391 | $17,430 |
| Arizona | $1,477 | $5,416 | $14,771 |
| Arkansas | $1,293 | $4,742 | $12,932 |
| California | $1,683 | $6,172 | $16,833 |
| Colorado | $1,525 | $5,591 | $15,248 |
| Connecticut | $1,683 | $6,170 | $16,826 |
| Delaware | $1,497 | $5,490 | $14,972 |
| District of Columbia | $1,660 | $6,086 | $16,597 |
| Florida | $1,346 | $4,935 | $13,460 |
| Georgia | $1,353 | $4,959 | $13,526 |
| Hawaii | $1,846 | $6,769 | $18,461 |
| Idaho | $1,449 | $5,312 | $14,488 |
| Illinois | $1,818 | $6,665 | $18,178 |
| Indiana | $1,535 | $5,628 | $15,349 |
| Iowa | $1,499 | $5,495 | $14,987 |
| Kansas | $1,431 | $5,246 | $14,308 |
| Kentucky | $1,403 | $5,145 | $14,032 |
| Louisiana | $1,355 | $4,967 | $13,548 |
| Maine | $1,512 | $5,543 | $15,116 |
| Maryland | $1,505 | $5,518 | $15,050 |
| Massachusetts | $1,771 | $6,494 | $17,710 |
| Michigan | $1,525 | $5,591 | $15,248 |
| Minnesota | $1,697 | $6,223 | $16,971 |
| Mississippi | $1,307 | $4,793 | $13,073 |
| Missouri | $1,533 | $5,621 | $15,330 |
| Montana | $1,521 | $5,578 | $15,214 |
| Nebraska | $1,413 | $5,181 | $14,129 |
| Nevada | $1,533 | $5,621 | $15,330 |
| New Hampshire | $1,508 | $5,530 | $15,082 |
| New Jersey | $1,710 | $6,271 | $17,103 |
| New Mexico | $1,354 | $4,965 | $13,541 |
| New York | $1,664 | $6,102 | $16,641 |
| North Carolina | $1,347 | $4,938 | $13,466 |
| North Dakota | $1,525 | $5,590 | $15,245 |
| Ohio | $1,539 | $5,644 | $15,393 |
| Oklahoma | $1,335 | $4,895 | $13,350 |
| Oregon | $1,599 | $5,864 | $15,993 |
| Pennsylvania | $1,515 | $5,554 | $15,148 |
| Rhode Island | $1,553 | $5,694 | $15,528 |
| South Carolina | $1,349 | $4,947 | $13,491 |
| South Dakota | $1,358 | $4,978 | $13,576 |
| Tennessee | $1,364 | $5,000 | $13,636 |
| Texas | $1,343 | $4,925 | $13,431 |
| Utah | $1,464 | $5,367 | $14,638 |
| Vermont | $1,503 | $5,510 | $15,028 |
| Virginia | $1,453 | $5,328 | $14,532 |
| Washington | $1,741 | $6,384 | $17,411 |
| West Virginia | $1,471 | $5,393 | $14,708 |
| Wisconsin | $1,562 | $5,727 | $15,619 |
| Wyoming | $1,503 | $5,512 | $15,031 |
Big metro areas often run above their state's figure.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $500 to $7,500 | $4,500 | Counted |
| HomeAdvisor | $5,000 to $15,000 | $5,500 | Counted |
| Bob Vila | $1,500 to $15,000 | $5,500 | Counted |
| This Old House | $1,500 to $15,000 | $5,500 | Shown, not counted: it repeats another guide's figures |
How the crawl space encapsulation range is combined: low end from the middle of the guides' lows, high end from the middle of their highs, typical from the middle of their averages (a range's midpoint where no average is given). Figures read on each guide's page on October 9, 2026.
Labor share used: 60%. This Old House says labor is 50% to 70% of the cost. State factor: the state's median hourly wage for construction and extraction workers over the national $28.63 (BLS, May 2025), kept between 0.7 and 1.4.
For contractors: price this job in Koira
Foundation and basement work is a big, worried purchase, so a clear scope and a fast written price help.
Run the numbers for a real crawl space encapsulation in the free crawl space encapsulation cost calculator, then save the result as an estimate. With Koira's free Office plan, the crawl space encapsulation estimate, the deposit and the final invoice live in one place, sent by text. See estimates. Price this job in Koira, free.
Sources: Fixr, crawl space encapsulation cost; HomeAdvisor, crawl space encapsulation cost; Bob Vila, crawl space encapsulation cost; This Old House, crawl space encapsulation cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files). Prices checked October 9, 2026. More for your trade: how the trade runs on Koira.