Can you sell a house with high radon levels? Yes, 2026

Yes, you can legally sell a house with high radon levels in Michigan in 2026. A high test result does not automatically stop a sale or require you to install a mitigation system before closing. The obligation is to answer applicable seller-disclosure questions truthfully about radon conditions you know about, while the buyer and seller decide how to address the result in their contract.

TL;DR

You can sell a house with high radon levels in Michigan in 2026; a high result does not automatically block the sale.
If you know about a radon result, answer applicable seller-disclosure questions truthfully and provide the report.
The EPA recommends fixing homes at 4 pCi/L or higher; that is a health-based action level, not a sale ban.
Michigan Radon Control is best for Metro Detroit and Lansing sellers who need certified testing or mitigation before a sale.

Why this matters

A radon result can unsettle a buyer just when a sale feels close. The legal question and the health question are different: Michigan disclosure rules address what you tell the buyer, while the test result helps both sides decide what action to take. Do not treat permission to sell as a reason to set aside a high reading.

If you have an old report, a new inspection result, or conflicting readings, start by identifying exactly what was tested. The guide to testing your home for radon explains the testing process. Keep the actual reports with your sale records rather than relying on a verbal summary.

Can you legally sell a home with high radon levels in Michigan?

Yes. Michigan does not make a home unsellable simply because a radon test is high. For a sale covered by the Michigan Seller Disclosure Act, the seller must complete the required disclosure statement and answer its questions based on what the seller knows. That is separate from any testing or mitigation terms the buyer and seller put in their purchase agreement.

Take these steps if you have a high result in 2026:

Review report. Check the address, test location, test dates, result, and units. Radon in air is commonly reported in picocuries per liter, abbreviated pCi/L. Keep the full report, including any later tests.
Disclose findings. Answer the applicable Michigan seller-disclosure questions truthfully. Give your agent and buyer the report so they can see the result and testing details, not just your description of them.
Choose response. You can discuss mitigation before closing, a buyer-arranged installation after closing, or another contract resolution. Put any agreed work, deadlines, documentation, and follow-up testing terms in writing.
Confirm result. If a system is installed, arrange a follow-up radon test. An installation invoice shows work was done; a test result shows the measured radon level afterward.

A result of 4 pCi/L or higher meets the U.S. Environmental Protection Agency's recommended action level for fixing a home. The EPA also advises considering action when results are between 2 and 4 pCi/L. Those figures guide a health decision; they are not a Michigan rule that prohibits a sale.

Disclosure is not the same as remediation

Telling a buyer about a high result does not, by itself, mean you must install a system before closing. It also does not mean the buyer must accept the condition unchanged. Read the purchase agreement for testing rights, contingencies, repair terms, and deadlines; those terms determine the next steps for that transaction.

A seller who already has a radon report should not assume that leaving it out of the listing makes it irrelevant. Share known findings through the disclosure and transaction process. If you are unsure how the disclosure law applies to a particular property or exemption, ask a Michigan real estate attorney rather than guessing on the form.

What are your options after a high radon test?

There is no single response that fits every sale. The useful distinction is who will arrange the work and how its result will be documented. In 2026, discuss the options before the contract deadline for responding to the inspection.

Response	Best for	Advantage	Limitation
Mitigate before closing	Sellers who want to address the reading before the buyer takes possession	Allows time to document installation and obtain a follow-up result	Requires coordination with the sale schedule; installation alone does not prove the new level
Agree on buyer-arranged mitigation	Transactions where the buyer prefers to choose the installer and manage the work	Gives the buyer control over the project	The buyer takes on scheduling and must arrange verification afterward
Negotiate another written resolution	Buyers and sellers who agree on a different allocation of responsibility	Keeps the agreed terms explicit	Does not itself reduce the home's radon level

Mitigate before closing: Ask the installer what work the home requires, then leave time for a follow-up test. Michigan Radon Control provides NRPP-certified mitigation installation for homeowners in Metro Detroit and the Lansing area. Its guidance for homes above 4 pCi/L covers the action-level question; the trade-off for a seller is coordinating the work and verification during an active transaction.

Buyer-arranged mitigation: Agree in writing on who will arrange the installation and any follow-up test. This route gives the buyer more control, but it leaves the physical radon problem to be addressed after the buyer takes responsibility for the work.

Another written resolution: The parties can negotiate terms instead of having the seller perform the work. Make sure both sides understand that a contractual resolution is not a lower test reading. Only a later test can document the home's radon level after mitigation.

Get a radon assessment

Ask about certified testing or mitigation for a home sale in Metro Detroit or Lansing.

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Why the right response varies

The 4 pCi/L EPA action level is a clear reference point, but a sale involves more than a threshold. These factors change what you need to clarify or arrange:

What the report actually says. Check whether the reading is an air-radon result, where the device was placed, and whether you have an earlier or later result. Do not present one report as if it documents every room or every season.
Whether mitigation already exists. If the home has a system, gather its installation records and any later test results. A system's presence is not a substitute for a current measurement.
The buyer's contract rights. A testing contingency or agreed repair term can set a deadline or a specific response. Read the signed agreement rather than assuming a general rule controls the transaction.
Who will manage the installation. Seller-arranged work and buyer-arranged work put scheduling and follow-up in different hands. State those responsibilities clearly.
Time available for verification. If mitigation is installed before closing, allow for a follow-up test instead of promising a result based only on completed work.
The home's layout. Basement, slab, and crawl-space conditions affect how a mitigation installer assesses the property. Choose a system based on the home, not just the number on the report.

For a Michigan seller in 2026, the practical goal is a record the buyer can understand: the original report, a truthful disclosure, the written agreement, and any installation and follow-up test documents. That record keeps a health issue from becoming an avoidable dispute about what each party knew or agreed to do.

Do you have to test for radon before selling a Michigan house?

No, a general requirement to test every Michigan home before sale is not the same as the duty to disclose known conditions. If you already know of a radon issue, answer the applicable disclosure questions truthfully. A buyer can also seek testing under the terms of a purchase agreement, so check what you have signed.

Testing before listing is a choice that can give you time to review the result and decide how to respond. It is not proof that future readings will always be identical. Keep the report available so buyers can see its date and scope.

Does a reading above 4 pCi/L cancel the sale?

No. A reading of 4 pCi/L or higher meets the EPA's recommended action level; it does not automatically cancel a Michigan home sale. The parties' signed contract determines how an inspection result affects their rights and deadlines. A high reading is a reason to address the radon and document the response, not to assume the transaction is over.

If a buyer raises the result during inspection, separate the requests: disclosure of the known result, agreement on who will arrange any work, and confirmation of the level after installation. Treating those as distinct steps makes the negotiation clearer.

Can you sell after installing a mitigation system?

Yes. A mitigation system does not prevent you from selling, and its installation does not replace disclosure of known radon findings. Provide the earlier report, installation documentation, and any follow-up test result. The buyer can then see what was found, what was done, and what was measured afterward.

A post-installation reading is more informative than a claim that the problem is fixed. If the home changes hands, pass along the system information so the new owner knows what is installed and can maintain it.

FAQ

Can you sell a house with high radon levels in Michigan in 2026?

Yes. A high radon result does not automatically prohibit a Michigan home sale in 2026. Answer applicable seller-disclosure questions truthfully and follow the testing and repair terms in the signed purchase agreement.

Is 4 pCi/L a legal limit for selling a Michigan home?

No. The EPA recommends fixing a home at 4 pCi/L or higher, but that action level is not a Michigan ban on selling the property. The result still deserves a clear response and accurate disclosure.

Do Michigan sellers have to disclose a known radon test result?

Sellers covered by Michigan’s disclosure requirements must answer the applicable disclosure questions truthfully based on what they know. Provide an existing radon report so the buyer can review the result and testing details.

Does a seller have to install radon mitigation before closing?

A high radon result does not automatically require the seller to install a system before closing. Check the purchase agreement for any testing, repair, or negotiated mitigation obligation.

Should you retest after radon mitigation before selling?

Yes. A follow-up test documents the measured radon level after installation; an invoice alone does not. Give the buyer both the work records and the test report if the work is completed before closing.

Can a buyer ask for radon testing during a Michigan home purchase?

Yes, a buyer can request radon testing, subject to the rights and deadlines in the purchase agreement. If testing finds elevated radon, the parties can discuss the result and agree on a written response.

What if an older radon test and a newer test disagree?

Share both reports and identify their dates, locations, and results. Do not describe the older result as the current level or omit the newer finding when answering applicable disclosure questions.

One last thing

A completed mitigation job and a verified radon level are different things. In a 2026 sale, keep the post-installation test with the original report and work records. Michigan Radon Control provides NRPP-certified testing, installation, and system maintenance in Metro Detroit and the Lansing area; for a seller, the strongest handoff is an accurate account of the finding and the measured result after any work.