Do I Have to Disclose Radon When Selling a House in North Dakota? (Bismarck Seller Guide)

By Rebecca Sabot, Real Estate Agent
© 2025 Rebecca Sabot. All rights reserved.

Radon isn’t a “maybe I’ll mention it later” issue in North Dakota. If you’re selling a home in Bismarck (or anywhere in ND), state law requires a radon disclosure statement and—if you have certain information—you must share it with the buyer before the purchase agreement is signed.

The Quick Answer

Yes. North Dakota requires sellers to:

• Provide a radon disclosure statement (with a required warning).

• Disclose any knowledge of radon concentrations in the home.

• Provide radon test results (if the home has been tested and the results are reasonably available).

• Provide evidence of mitigation (if a mitigation system exists and you have documentation).

What North Dakota Sellers Must Disclose

1) Any known radon information

If you know the home has had radon issues, elevated test results, or anything related to radon levels—you must disclose what you know. That includes prior tests, past real estate transactions, inspection reports, or contractor documentation.

2) Radon test results (if the home was tested)

If you know the home was tested, you must provide the results that are reasonably available to you before the purchase agreement is executed.

3) Mitigation details (if applicable)

If the home has a mitigation system (or had one installed), provide documentation you have—invoice, warranty, or proof the system exists.

Do I Have to Test for Radon Before Selling?

Not automatically. The law focuses on disclosing what you know and providing the required radon statement.

That said, many Bismarck sellers choose to test before listing because it:

• prevents surprises during buyer inspections

• gives you control over timeline and negotiations

• helps the home feel more “buttoned-up” and trustworthy

What If Radon Is High?

You’ve got three common options:

Option A: Mitigate before listing

Clean, simple, and often reduces buyer anxiety.

Option B: Negotiate after buyer testing

This can work, but it’s more stressful because it happens under a deadline.

Option C: Offer a credit

Best for situations where the buyer wants control over the contractor or scope.

My Bismarck Seller Tip: Make Radon Boring (In a Good Way)

I’m Rebecca Sabot, Real Estate Agent, and as a full-time realtor in Bismarck, I’ve learned that the smoothest transactions are the ones where radon is handled early and clearly.

Here’s the quick plan:

1. Gather paperwork (tests, mitigation invoices/warranties).

2. Disclose clearly upfront.

3. Decide whether you want pre-list testing based on your home and timeline.

4. If you have mitigation, market it as a “responsible homeowner” feature.

Want a Radon-Smart Listing Plan?

Radon is common, measurable, and fixable. The key is handling it early so it doesn’t hijack your deal during inspection week.

If you’re selling in Bismarck or surrounding areas and want help building a clean disclosure + negotiation plan, I’m happy to help.

By Rebecca Sabot, Real Estate Agent
© 2025 Rebecca Sabot. All rights reserved.