Kansas is one of the few states that writes radon directly into the sales contract. Since 2009, K.S.A. 58-3078a has required every contract for the sale of residential property to carry a radon notice — one that identifies radon as a Class-A carcinogen, recommends a radon test by a certified measurement technician before purchase, and states plainly: “Kansas law requires sellers to disclose any information known to the seller that shows elevated concentrations of radon gas in residential real property.”
So in every Topeka sale, two things are true by statute: the buyer is told, in the contract itself, to consider testing — and the seller must disclose any known elevated results. (There is no separate state disclosure form for radon; the notice lives in the contract, and known results must be disclosed.)
We’re a local radon referral service. Call or send the form and we’ll connect you with a certified radon professional serving Shawnee County — Kansas law requires certification for radon work, and certified pros are who we refer. No charge to you for the referral.
The Kansas Radon Program has published what actually happens in Kansas sales: about 33% of homes sold get tested for radon during the transaction, and of those, about 30% test high — and get fixed with a mitigation system. Program analysis of one year’s sales estimated thousands more homes would have tested high but were simply never tested. The takeaway for both sides of the table: testing is normal here, high results are common here, and the fix is routine here.
Put radon testing in your inspection contingency and schedule it the day your offer is accepted — a proper transaction test needs a 48-hour minimum run inside a window measured in days. Use a certified measurement professional (required in Kansas for paid testing, and the only kind of number the other side must respect). If the result is 4.0 pCi/L or higher, you’re negotiating a known, priceable repair — typically $800–$2,500, with Kansas mitigated homes averaging a finish near 1.2 pCi/L — not walking away from the house.
Two clean paths. Test before listing: a low result is a documented answer to a question the contract itself raises; a high result you mitigate on your own schedule and market as “radon mitigated, verified at [result].” Or disclose what you know and let the buyer test — legal, but the timing and framing belong to their inspector. What the statute forecloses is silence about known elevated results: that disclosure duty is the law, in the contract you sign.
You already have the radon conversation in every closing — the contract notice guarantees it. If your deals keep needing fast, certified transaction tests or a written mitigation quote to keep a contingency alive, we can be the call you make.
We’re a local radon referral service. Call or send the form and we’ll connect you with a certified radon professional serving Shawnee County — Kansas law requires certification for radon work, and certified pros are who we refer. No charge to you for the referral.
Topeka Radon Mitigation — Connecting Topeka and Shawnee County homeowners with certified radon professionals.
Serving Topeka, North Topeka, Silver Lake, Rossville, Auburn, Wakarusa, Berryton, Tecumseh, and greater Shawnee County.
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Radon information on this site is general guidance, not a substitute for professional testing of your specific home. Topeka Radon Mitigation is a referral service and does not itself perform radon measurement or mitigation.