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What will crawl space encapsulation actually cost?
Enter your crawl space size and condition. We price each part of the job separately, so you can see what drives the quote and compare contractor bids line by line.
- Full encapsulation typically $5,000–$15,000, average $5,500 (Angi)
- Vapor barrier installed $2–$4 per sq ft (HomeGuide)
- Dehumidifier installed $1,000–$3,000 (HomeGuide)
- Free quotes from independent local contractors
Crawl Space Encapsulation Pros is a free referral service, not a contractor. Independent local pros quote and do the work.
Typical national cost$5,000 – $15,000Cost guide →- 6 countieswith local pages
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What's Going On?
Pick the closest match. Each one takes you to the page that handles it, with the request form ready.
Start With a Free Estimate
Know the number before you call anyone. Free calculators and checkers built on published industry data — no sign-up.
What Is CrawlSpaceEncapsulationPros?
CrawlSpaceEncapsulationPros.com is a homeowner research site published by Cornelia Cove LLC. We help homeowners understand crawl space moisture problems and what encapsulation costs. A sealed crawl space keeps moisture, pests and odors out of your living space.
Our cost calculator and guides break a quote into the parts you can check: vapor barrier, vent sealing, dehumidifier, drainage, insulation and repairs, with the questions that separate a fair bid from a padded one. Prices are typical US ranges from named sources; always get written, itemized local quotes.
We connect homeowners with independent local crawl space contractors. Each request reaches the contractor with the project details: county, crawl space size, current conditions, and what type of encapsulation they're considering. We don't do the work ourselves.
Services
Crawl Space Encapsulation
Crawl space encapsulation averages $5,500 ($5,000–$15,000). See what's included, local code rules, permits, and get quotes from independent local pros.
Learn more →Crawl Space Vapor Barrier Installation
A crawl space vapor barrier costs $1,200–$4,000 installed. Compare 6- to 20-mil liner prices, roll counts, code laps, and quotes from local pros.
Learn more →Crawl Space Dehumidifier Installation
Crawl space dehumidifiers cost $1,000–$3,000 installed. Size one by square footage and code (70 pints per 1,000 sq ft in Henrico, VA), then get quotes.
Learn more →Crawl Space Repair & Moisture Remediation
Crawl space repair averages $6,000 ($4,500–$8,000). See costs for sagging floors, piers, drainage, sump pumps and mold cleanup, plus permit rules near you.
Learn more →Cost Guides & Emergency Help
Real price ranges with sources, and step-by-step first moves for the problems that can't wait.
What Each Part of the Job Costs
Published installed-cost ranges for the line items in a crawl space encapsulation quote. Each card links to its source.
Vapor barrier: $2–$4 per sq ft
Installed on the floor and walls. Liner material alone runs $0.30–$0.70 per sq ft from 6 to 20 mil; Angi puts a vapor-barrier job at $1,000–$3,000.
Source: HomeGuide — Crawl Space Encapsulation Cost (Jan 14, 2026)
Sealing vents and holes: $150–$450
Closing foundation vents and gaps is what turns a ground cover into a sealed space. Angi prices pro-installed vent covers at $40–$50 each.
Source: HomeGuide — Crawl Space Encapsulation Cost (Jan 14, 2026)
Dehumidifier, installed: $1,000–$3,000
The unit itself runs $300–$2,000. Budget $10–$30 a month in electricity to run it.
Source: HomeGuide — Crawl Space Dehumidifier Cost (Dec 19, 2025)
Wall insulation: $500–$1,600
Rigid foam on the walls of a 1,000 sq ft crawl space with 3-ft walls, or $1.20–$3.70 per sq ft. Removing old insulation adds $1–$2 per sq ft.
Source: HomeGuide — Crawl Space Insulation Cost (Dec 19, 2025)
Drainage: $800–$3,000
For a crawl space that takes on water. A full interior drainage system with a sump runs $4,000–$12,000.
Source: HomeGuide — Sump Pump Installation Cost (Aug 26, 2023)
Mold remediation: $1,500–$4,000
Existing mold should be treated before the space is sealed, otherwise you trap it in. Angi prices mold work found during encapsulation at $1,000–$3,500.
Source: HomeGuide — Crawl Space Encapsulation Cost (Jan 14, 2026)
Worked example: a 1,200 sq ft crawl space
Vapor barrier on the floor and walls, vents sealed and a dehumidifier installed, with normal access. Each line is the published range times the quantity where it applies, rounded to the nearest $10.
| Line item | Range |
|---|---|
| Vapor barrier installed, floor and walls ($2–$4/sq ft × 1,200 sq ft) | $2,400–$4,800 |
| Seal vents and holes | $150–$450 |
| Crawl space dehumidifier, installed | $1,000–$3,000 |
| Estimated total | $3,550–$8,250 |
Our arithmetic from HomeGuide's published ranges (dehumidifier from its Dec 19, 2025 dehumidifier guide), not a quote. Your own numbers will differ: drainage, mold, insulation and repairs are extra. Run the calculator with your inputs.Source: HomeGuide — Crawl Space Encapsulation Cost (Jan 14, 2026)
Why CrawlSpaceEncapsulationPros?
Cost calculator
Estimate materials and labor based on your crawl space dimensions and the scope of work.
Sourced cost data
Every price range cites HomeGuide, Angi or HomeAdvisor. No made-up numbers.
Local permit info
County pages list building permit requirements and contractor licensing rules.
How It Works
- Step 1
Estimate your project
Enter your crawl space dimensions and conditions. The calculator estimates materials and labor.
- Step 2
Compare costs
See published prices for vapor barriers, dehumidifiers, drainage and full encapsulation.
- Step 3
Request quotes
Submit your details and connect with an independent local crawl space contractor who serves your county. A fair bid should itemize the same lines as your estimate.
Counties We Serve
Local pages with service-area notes, common jobs, and pricing context for each county we cover.
Frequently Asked Questions
How much does crawl space encapsulation cost?
Angi puts a typical full encapsulation at $5,000 to $15,000, with an average near $5,500; HomeGuide gives $3,000 to $15,000, or about $3 to $10 per sq ft. A vapor-barrier-only job runs $1,000 to $3,000 (Angi) or $1,200 to $4,000 (HomeGuide).
How long does encapsulation take?
It depends on size, drainage and mold work. Ask each bidder for a written schedule; there is no reliable published average.
Will my homeowners insurance pay?
Usually not. Insurance covers sudden damage, not gradual moisture. Water damage from a burst pipe may be different, so ask your carrier.
Can I do it myself?
A handy owner can lay a vapor barrier. HomeGuide prices 20-mil liner at $720 to $840 per 1,200 sq ft roll, so a 1,500 sq ft space with 3-ft walls needs about two rolls, roughly $1,440 to $1,680 in liner (our estimate from HomeGuide roll prices). Sealing vents, sizing a dehumidifier and installing drainage are harder to get right.
Does encapsulation stop mold?
It removes the conditions mold needs (high humidity), but existing mold should be treated before sealing, otherwise you trap it in. Keeping humidity down takes a drying method: in humid climates, a dehumidifier or a supply of conditioned air from the HVAC system. Without one, a sealed space can still hold moisture.
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