Radon When Buying or Selling a Home in Bismarck
North Dakota's SB 2204 became law in April 2025. If you are buying or selling in Burleigh or Morton county, here is what it does and, just as important, what it does not do.
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What sellers must hand over
Under SB 2204 (NDCC chapter 47-10, signed 17 April 2025), sellers must disclose in writing what they know about radon levels. They must also give the buyer a state-worded radon warning statement to sign, plus any past test results and mitigation records.
If the house already has a radon system, ask for the install paperwork and the last test.
What the law does not do
It does not require a test and it does not give the buyer a right to cancel. If you are buying in Bismarck, Mandan or Lincoln, order a test as part of the inspection period anyway.
With a Burleigh County survey rate of 47% and Morton County at 53%, an untested house is a coin flip.
Testing during a sale
Closed-house conditions matter during the test. Use a continuous monitor, which a home inspector may add for about $150, or a professional test costing up to $800 nationally.
If the result is 4 pCi/L or higher, a system can often be negotiated into the sale or installed before closing.
Where we offer buying or selling a home
Frequently asked questions
Do I have to test my Bismarck house before selling?
No. The 2025 law requires disclosure of what you know, not a test.
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Call now for a free quote from a local radon testing and mitigation pro.
Call (701) 402-5374