Can I Sell a House With High Radon in Maine?
Yes — every day. The question isn't whether you can sell, it's whether you'll mitigate now or eat a much bigger price reduction later.
Maine homes with high radon sell every week. But in 95% of transactions, the buyer's inspection finds it, and you end up paying for mitigation at closing through a price concession that's 2–3× what the actual mitigation would have cost. The only winning move is to test before listing and mitigate before the offer comes in.
What Maine Law Requires You to Disclose
Maine's Property Disclosure Statement explicitly asks about radon — you cannot hide it.
Known prior tests
If you've ever tested your home and have the result, you must disclose it. Including high readings. Including readings from years ago.
Existing mitigation systems
If you have an existing radon mitigation system, you must disclose its presence and provide any documentation about its installation and post-mitigation test results.
"I don't know" is allowed
If you've genuinely never tested, you can disclose "unknown." But once an inspection turns up a high reading, you'll need to address it — and savvy buyers' agents always recommend a radon test in Maine.
Landlord rules differ
Maine landlords are required to disclose known radon levels and provide tenants with EPA's radon information. Sellers should know this if marketing to investors.
The Three Strategies (and Which One Wins)
| Strategy | What it costs you | Risk to deal | Outcome |
|---|---|---|---|
| 1. Test & mitigate before listing | $1,500–$2,500 out of pocket; takes ~1 week | Low | Best. Documented system, no inspection surprises, often a selling point with health-conscious buyers. |
| 2. Disclose unknown, let buyer test | $0 upfront, but 70–80% of central Maine homes test high → leads to renegotiation | Medium-high | Buyer demands credit ($3,000–$5,000) or seller-installed system before close. Often delays closing 1–2 weeks. |
| 3. Disclose high & offer credit | Listing price discount of $4,000–$8,000 typical | Medium | Filters out some buyers. Most still want it mitigated before move-in. Largest dollar impact of the three. |
Strategy 1 wins almost every time. The cost is small, the timeline is short, and you control the narrative instead of negotiating from a defensive position.
If You Already Have an Offer
Don't panic. Most Maine real estate contracts allow 7–10 days for radon testing during inspection contingency. That's enough time to:
- Day 1–2. Buyer's inspector places radon test. Results come back in 4–7 days.
- Day 3–7. If high, get a mitigation quote immediately. Most reputable Maine mitigators provide same-day phone quotes.
- Day 8–10. Negotiate the addendum. Typical resolution: seller agrees to install a professional mitigation system before closing, with a post-mitigation test confirming levels under 4 pCi/L.
- Day 11–18. Mitigation installed (1 day), post-mitigation test runs (4–7 days). Closing proceeds on schedule.
Common Questions From Maine Sellers
Will mitigation hurt my home's resale value?
The opposite. A documented professional mitigation system is a selling point — buyers see it as a problem already solved. Many home inspectors note it positively in their reports.
How visible is the system?
A typical sub-slab system is one 3" PVC pipe running from the basement to above the roofline, with a small inline fan. It's neat, tucked into a corner or chase, and a competent installer makes it nearly invisible from the curb.
Can I install a cheap DIY system to satisfy the buyer?
You can, but most inspection contingency clauses require a professionally-installed system with documentation. A DIY system without NRPP-certified install paperwork often doesn't satisfy lenders or buyer's agents.
Do I have to fix radon in well water too?
If your well water tests high (above 4,000 pCi/L), most buyers will want it addressed. Aeration systems run $4,500–$6,500 — discuss with your agent whether to address proactively or as an inspection negotiation.
What documentation should I provide at closing?
Installation invoice from a licensed mitigator, the post-mitigation test result showing levels below 4 pCi/L, the system warranty, and the manometer reading at install. We provide all of this as a standard packet on real estate jobs.
Listing Soon? Or Already Under Contract?
We work fast on real estate timelines and provide all the documentation buyers and lenders need. Same-week installation is standard for closings.
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