Indiana Radon — Frequently Asked Questions
Common questions about radon licensing, testing, mitigation, and home sales in Indiana.
Do I need a licensed contractor for radon mitigation in Indiana?
Yes. Indiana requires all radon mitigators to hold an active state license issued through the Indiana Professional Licensing Agency (IPLA). Hiring an unlicensed contractor is illegal in Indiana and may result in a system that does not comply with state standards or satisfy home sale disclosure requirements.
How much does radon mitigation cost in Indiana?
Most residential radon mitigation systems in Indiana cost between $1,200 and $2,000 installed. The price depends on your home's foundation type (basement, slab, crawl space), the number of suction points needed, and the contractor. Get at least two quotes.
What is the EPA action level for radon?
The EPA recommends taking action when radon levels reach 4 pCi/L (picocuries per liter) or higher. The EPA also recommends considering mitigation between 2 and 4 pCi/L. There is no known safe level of radon exposure.
How common is high radon in Indiana?
Indiana is one of the highest-radon states in the country. Most Indiana counties are EPA Zone 1, meaning the average predicted indoor radon level exceeds 4 pCi/L. The Indiana State Department of Health estimates that 1 in 3 Indiana homes has radon levels above the EPA action level.
What is the difference between a radon tester and a radon mitigator?
A radon tester (Primary or Secondary Radon Tester) is licensed to measure radon levels in a building. A radon mitigator is licensed to install and service radon mitigation systems that reduce radon levels. Some contractors hold both licenses. If your test shows elevated radon, you need a mitigator to install a system.
Does radon mitigation require a building permit in Indiana?
It depends on the municipality. Some Indiana cities require a building permit for radon mitigation system installation; most do not. Check with your local building department or use Indiana Permit Finder (indianapermits.com) to look up requirements for your specific city or county.
How long does radon mitigation take?
Most residential radon mitigation system installations take 4–8 hours. The contractor will drill a hole in your foundation, install a suction pipe, and connect it to a fan that vents radon outside. The system runs continuously and typically reduces radon by 50–99%.
How do I verify a contractor's Indiana radon license?
You can verify any Indiana radon license at the Indiana Professional Licensing Agency's online verification portal (mylicense.in.gov/everification). Search by the contractor's name or license number. Every profile on this site shows the license number — you can verify it independently.
Do I need a radon test before selling my Indiana home?
Indiana does not legally require radon testing or disclosure in home sales, but most buyers request it as part of the inspection contingency. If the test comes back above 4 pCi/L, buyers typically negotiate for mitigation before closing. Having a current test and a mitigation system already installed can speed up the sale.
How often should I retest after mitigation?
The EPA recommends testing your home every two years after mitigation, and any time you make structural changes. Your contractor should provide a post-mitigation test (typically 24 hours after installation) to confirm the system is working. Keep that report — it may be requested during a future home sale.
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