Radon mitigation is one of the most common repair items to come out of a home inspection, and one of the first questions we hear is whether insurance will pay for it. The short answer is no. Here is why, and how it usually gets paid for instead.
Why insurance does not cover it
Homeowners policies cover sudden, accidental damage — a burst pipe, a storm, a fire. Radon is a naturally occurring gas that seeps from the soil continuously; it is a pre-existing environmental condition of the property, not a covered peril. No standard HO-3 policy covers testing or mitigation, and there is no rider for it. The same logic applies to mold that grows from long-term humidity rather than a covered water event.
Who pays in a home sale
In practice, the cost is negotiated between buyer and seller during the inspection contingency. The buyer’s inspector runs a 48-hour continuous monitor test; if the result is at or above the EPA action level of 4.0 pCi/L, the buyer typically asks the seller to install a mitigation system before closing or to credit the cost. Sellers in high-radon areas increasingly mitigate before listing to remove the contingency altogether.
What it costs
A standard active sub-slab depressurization system on a basement or slab home runs roughly $900 to $2,000 installed in most of the country, including the post-mitigation test. Homes needing two suction points, block-wall suction, a crawl space membrane or attic-routed fans push toward $2,000 to $3,000. Costs vary by region and geology; in EPA Zone 1 counties such as York County, Pennsylvania, radon mitigation York PA contractors publish local price ranges and design the fan size from actual sub-slab pressure measurements because the limestone, shale and schist under the county behave very differently.
What a compliant install includes
- A visual inspection and sub-slab diagnostic before the quote
- Sealed slab and wall penetrations, caulked cracks and floor-wall joint
- A gasketed sump lid with a radon-resistant drain where needed
- A U-tube manometer and a system label with the installer’s certification
- Exhaust terminating above the roof surface and away from windows
- A post-mitigation test with a written result
Some states license or certify radon contractors; Pennsylvania, for example, requires DEP certification for anyone paid to test or mitigate. A full description of a certified radon mitigation system installation is a useful reference for what to expect wherever you live.
Tax and assistance options
Radon mitigation is not federally tax-deductible for a primary residence, but some states and counties offer low-income assistance or rebate programs through their health departments, and a system installed as part of a sale is simply a negotiated closing cost. Ask your agent and your state radon program office.
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