How Much Does a Radon Test Cost in Illinois?
A professional radon test in Illinois costs $149 to $249 using a continuous radon monitor placed for at least 48 hours. Illinois also makes low-cost test kits available through IEMA-OHS (the Illinois Emergency Management Agency and Office of Homeland Security), though kits are less suitable for real estate transactions because they lack tamper detection.
| Service | Typical cost | Notes |
|---|---|---|
| Professional continuous monitor test | $149 – $249 | 48 hours, hour-by-hour data, tamper detection |
| Bundled with a mold inspection | $99 – $179 | Discounted when combined |
| DIY short-term kit | $15 – $40 | Fine for screening, not for a transaction |
| Radon mitigation system (referral) | $1,200 – $2,800 | Installed by an independent contractor; varies with home size and foundation |
Most of the Metro East falls in EPA Zone 2 (moderate potential); Jersey County is Zone 1, the highest band. EPA states that every home should be tested regardless of zone designation. Confirm current kit pricing with IEMA-OHS rather than assuming a free kit is available.
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Common questions
Do you charge for a quote?
No. Phone consultations are free, and if we do not think you need an inspection we will tell you so on the call.
What decides where I land in the range?
Four things: the square footage and number of levels, whether there is a crawl space needing access, how many laboratory samples the situation actually warrants, and whether you need same-week turnaround. We confirm the exact figure before we book, not after we arrive.
Is there a travel charge for my town?
No. Every town in our service area is charged at the same rate, from Edwardsville to Vandalia.
Can I get just the lab work without an inspection?
We do not recommend it. Samples taken without moisture mapping and an outdoor control produce numbers nobody can interpret, which is the most common way people waste money on mold testing.
Get a straight answer about your building
We test, document and verify. We never sell remediation, so we have no reason to find a problem you do not have.