Selling a House With Radon in Florida
Last updated: June 2026
Quick Answer
Yes, you can sell a Florida house with elevated radon levels. Known radon test results or mitigation history should be disclosed in writing, and the offer should state whether mitigation, credits, or as-is acceptance are part of the deal.
Radon in Florida: A Buyer's Perspective
Radon tends to matter most in parts of Central and North Florida where soil and limestone conditions can produce elevated readings. A typical sub-slab depressurization system often costs less than a roof, septic, or foundation repair, so the issue can usually be priced into an as-is offer.
If your house tests above the EPA action level, keep the report and any mitigation records. Some buyers will ask for mitigation or credits; our offer can price that risk up front so you are not surprised later.
Radon in Florida: The Numbers
Radon is a radioactive gas that can enter homes through cracks in slabs, foundation joints, and other openings. The EPA classifies counties into three radon zones. Zone 1, the highest-risk category, includes several Florida counties such as Alachua, Marion, Citrus, Hillsborough, Pinellas, Hernando, Levy, Columbia, Bradford, Union, Dixie, Gilchrist, and Lafayette. Florida's radon program reports that a meaningful share of tested homes in higher-risk areas measure at or above the EPA action level of 4 pCi/L.
Zone maps are a starting point, not a house-by-house answer. Florida's limestone, fill material, slab conditions, and ventilation can make readings vary from one property to the next. A nearby house can test low while yours tests high. The only way to know the number for a specific house is to test it.
Radon Mitigation Costs
Radon mitigation is often less expensive than roof, septic, foundation, or major mold work, but the right number depends on the foundation, access, and the mitigation company. A common sub-slab depressurization system for a slab-on-grade Florida home may be quoted around $800-$1,500. Crawl spaces, large footprints, or multi-point systems can cost more. The exact scope should come from a qualified radon mitigation contractor.
| Mitigation Type | Foundation | Cost Range |
|---|---|---|
| Sub-slab depressurization | Slab-on-grade | $800-$1,500 |
| Sub-membrane system | Crawl space | $1,200-$2,000 |
| Complex / multi-point system | Multi-level or large footprint | $1,500-$2,500 |
| Initial radon test (short-term) | Any | $150-$300 |
Compare that to a roof replacement ($15,000-$35,000) or mold remediation ($3,000-$30,000), and radon mitigation is one of the more affordable fixes in real estate. But buyers may not see it that way.
Florida Radon Disclosure Law
Florida Statute §404.056(5) requires that every real estate contract include a specific radon disclosure statement. The exact language is prescribed by law: "Radon is a naturally occurring radioactive gas that, when it has accumulated in a building in sufficient quantities, may present health risks..." You've likely seen it. Every Florida sale contract includes it.
Beyond the standard disclosure, if you've had a radon test performed, most real estate attorneys and the Florida Realtors standard disclosure form recommend sharing the results with the buyer. Withholding known test results can create dispute risk under Florida's general material-defect disclosure standards. If you've tested at 6 pCi/L or higher and haven't mitigated, that's something a buyer needs to know.
Health Risks and Buyer Perception
Radon is the second leading cause of lung cancer in the United States after smoking, responsible for roughly 21,000 deaths per year according to EPA estimates. Those numbers are real, but context matters. The EPA's action level of 4 pCi/L is conservative by international standards. Several European countries set their action thresholds at 5.4 pCi/L or higher. The World Health Organization's reference level is 2.7 pCi/L for new construction but 8.1 pCi/L for existing buildings, nearly double the EPA line.
For sellers, the practical problem is usually buyer confidence. A buyer may not know whether a slightly elevated result is a simple mitigation issue or a major health concern, so the inspection period can turn into requests for credits, contractor estimates, or contract cancellation. Many agents recommend pre-listing mitigation when a seller has time and the rest of the house is easy to finance. If the home already has other issues, an as-is cash offer may be a cleaner comparison.
Testing Before You List: Strategic Decision
You have three paths, and each one has a different cost-benefit profile. Path A: test before listing, and if results come back below 4 pCi/L, you can give buyers a cleaner answer. Path B: test and the results come back above 4 pCi/L. You should handle that report in writing, then decide whether mitigation before listing is worth the time and cash. Path C: sell as-is and let the buyer handle testing or mitigation after purchase, with the risk priced into the offer.
The right path depends on your timeline, the rest of the house, and how much cash you want to spend before closing. If the property also has roof, mold, title, tenant, or payoff issues, radon may be just one part of a larger as-is sale decision.
Why Buyers Walk After Radon Tests
The radon inspection contingency is where uncertainty can turn into a renegotiation. A buyer's inspector may run a 48-hour monitor and report a number above the EPA action level. The buyer then has to decide whether to accept mitigation after closing, request a credit, ask you to install a system, or cancel during the inspection period.
That does not mean every radon issue ruins a sale. It means the contract needs a clear written answer: who handles mitigation, what credit is included if any, whether the buyer accepts the condition as-is, and whether the closing date still works.
Sell Your House With Radon As-Is
FL Home Buyers can review a Florida house with known radon concerns and price the condition into a written as-is offer. If you already have a test report or mitigation estimate, send it with the other property details so the number reflects the known issue instead of leaving it for a later surprise.
There is still a title review, payoff review, access check, and seller-document process. The difference is that radon does not have to become a retail buyer objection if the offer already states what we are accepting and what seller costs, if any, are covered.
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