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Radon Mitigation Cost Calculator
Radon mitigation typically installs a sub-slab depressurization system — $800-$2,500 depending on basement type and complexity. Post-install testing confirms levels below EPA's 4 pCi/L threshold. Post-install testing is non-negotiable. Short-term test kits ($30-$60) or continuous radon monitors (Radon mitigation typically installs a sub-slab depressurization system — $800-$2,500 depending on basement type and complexity. Post-install testing confirms levels below EPA's 4 pCi/L threshold.50-$350) verify system effectiveness. Long-term test (90 days) provides better average than short-term. Retest annually and after any major foundation work (sealing, new slab). Some states require radon certification for the contractor and may regulate disposal of mitigation equipment.
Total mitigation cost
$1,480
Base system cost
$1,100
Extra fans cost
$0
How the math works
Poured slab single-fan: ~$1,100 + $200 sealing + $180 post-test = $1,480. Crawlspace with 2 fans: ~$2,400.
Get 3 contractor quotes (radon contractors listed on state health department sites). Verify certification. Cheapest isn't always best; ask about warranty on system performance below 4 pCi/L.
How to Use
- Enter basement type and complexity.
- Add optional sealing and post-install testing cost.
- See total installation cost.
Frequently Asked Questions
Do I need to fix radon?
EPA recommends action at 4 pCi/L. 20% of US homes test above. New construction often has passive systems pre-installed. Existing homes: retrofit as needed.
How well does mitigation work?
Well-installed system drops radon 60-95%, typically below 2 pCi/L. Success rate 95%+ with proper installation and sub-slab communication.
Is it a DIY project?
Not recommended. Licensed radon contractors ($800-$2,500) use diagnostic testing to ensure effectiveness. DIY systems often fail to achieve adequate depressurization.
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