Radon Mitigation Cost in Pennsylvania

Pennsylvania ranks #8 in the U.S. for radon risk. 73% of Pennsylvania counties are classified by the EPA as Zone 1 — the highest-risk category, with predicted average indoor radon levels above the EPA action level of 4 pCi/L. Here's what that means for mitigation cost.

Pennsylvania radon risk profile

Pennsylvania has 49 of 67 counties (73%) classified as EPA Zone 1. The state's Reading Prong — a geological formation of uranium-rich rock running through eastern Pennsylvania — was where the U.S. radon-in-homes problem was first identified in the 1980s (the Stanley Watras case). Pennsylvania remains one of the most-studied radon states.

Typical mitigation cost

National typical range: $1,200-$2,500 installed for a standard active sub-slab depressurization (ASD) system in a single-family home. Multi-level or multi-zone homes can reach $3,000-$5,000. These figures are from aggregated contractor pricing surveys and are not specific to Pennsylvania.

We do not publish a Pennsylvania-specific average cost figure because no reliable state-level cost survey is publicly available. Get 2-3 quotes from EPA-listed certified mitigators in your county for accurate Pennsylvania pricing.

Pennsylvania-specific factors

Pennsylvania has well-developed mitigation infrastructure due to the state's history with radon. Contractor density is high; competition tends to keep mitigation costs near the national average. The state requires radon mitigation contractors to be certified by the Pennsylvania Department of Environmental Protection.

How to find a certified mitigator in Pennsylvania

The two main certifying bodies for radon mitigation are the National Radon Proficiency Program (NRPP) and the National Radon Safety Board (NRSB). Both maintain public contractor directories searchable by ZIP code. If you live in a state with a radon program (which Pennsylvania does), the state health department typically maintains a certified-contractor list as well — usually on the department's environmental health page.

Always retest after mitigation. A properly designed system should reduce levels to under 2 pCi/L; verify the result rather than trusting the contractor's word.

Try the calculator

Radon Mitigation Cost Estimator

Get an installed-cost range for a standard ASD system based on home size and foundation type.

Home Inspection Cost Estimator

Pre-purchase home inspection cost — radon testing is often a bundled add-on.

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