How much does it cost to insulate a crawlspace?
Crawlspace insulation runs $1,200 for basic batt or rigid-foam install, $3,500 for typical encapsulation with vapor barrier, and $8,500+ for full encapsulation with dehumidifier and conditioned air.
Quick price points (2026)
| Scope | Cost | What it includes |
|---|---|---|
| Low | $1,200 | whole crawl |
| Typical | $3,500 | whole crawl |
| High | $8,500 | whole crawl |
How to budget for this project
- Get 3 quotes
Get itemized quotes from at least three licensed contractors in your area.
- Adjust for your region
Compare the same scope and account for regional labor and permitting.
- Add 10–15% contingency
Hidden conditions, code upgrades and permit fees can increase the original quote.
- Plan the cash, not the financing
Build the replacement cost into the home's repair plan before the work becomes an emergency.