Radon Mitigation Cost in Illinois
Typical radon projects in Illinois run $800–$2,500. Below is what moves that number, a tiered cost breakdown, and the 175 verified Illinois providers we list.
Radon causes ~21,000 lung-cancer deaths per year in the U.S. (EPA).
Typical Illinois range
$800–$2,500
A planning estimate, not a quote. Radon pricing is project-specific — confirm with a written, itemized estimate from a credentialed local provider.
What drives radon cost in Illinois
Scope & severity
The extent of the radon issue is the single biggest cost factor — a minor job and a major one can differ by an order of magnitude.
Home size & layout
Larger homes and complex layouts require more labor, materials, and time.
Access & site conditions
Crawl spaces, finished basements, and hard-to-reach areas add labor.
Credentials & warranty
Providers with NRPP / AARST credentials and solid warranties may price higher — usually worth it for health-and-safety work.
Local labor rates
Rates vary across Illinois between metro and rural areas.
Timing
Levels peak in winter (stack effect); January is national Radon Action Month.
Radon cost breakdown
Indicative tiers derived from the typical Illinois range. Your actual cost depends on the drivers above.
| Project tier | Estimated cost | What it covers |
|---|---|---|
| Entry-level / minor scope | $800 – $1,225 | Smallest, most straightforward radon jobs with easy access and no complications. |
| Typical project | $1,225 – $2,075 | What most Illinois homeowners pay for a standard radon project. |
| Complex / large scope | $2,075 – $2,500+ | Larger homes, difficult access, severe conditions, or extensive work. |
Estimates are planning ranges only and are not a quote. They reflect the typical radon range; regional and site-specific factors apply.
Get a local Illinois quote
The most accurate number comes from a credentialed local provider. Start with the Illinois hub, or jump to your city.
Radon cost in Illinois — FAQ
How much does radon mitigation cost in Illinois?
In Illinois, radon mitigation typically runs $800–$2,500. The exact figure depends on the scope of work, home size and condition, access, and local labor rates. Always get a written, itemized quote.
What makes radon cost more or less?
Scope and severity drive the price most: the size and condition of the home, access difficulty, the specific work required, and the credentials of the provider. Levels peak in winter (stack effect); January is national Radon Action Month.
What radon level requires mitigation?
The EPA action level is 4.0 pCi/L. Mitigation is recommended at or above this; consider it between 2–4 pCi/L.
How much does radon mitigation cost?
Most residential systems run $800–$2,500, depending on home size, foundation type, and radon level.
Should the contractor be NRPP-certified?
Yes. NRPP or NRSB certification verifies the contractor is trained and tested to AARST standards. Every provider here is listed with their credential.
Compare Illinois radon pros
Browse 175 verified radon providers in Illinois — every listing screened against NRPP / AARST.