How much does a radon mitigation system cost?
Radon mitigation system installation runs $950 for a basic basement sub-slab depressurization, $1,750 for a typical install with exterior fan and PVC venting, and $3,500+ for crawlspace encapsulation or multi-zone systems.
Quick price points (2026)
| Scope | Cost | What it includes |
|---|---|---|
| Low | $950 | per system |
| Typical | $1,750 | per system |
| High | $3,500 | per system |
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.