Radon & Real Estate in North Dakota

New disclosure law, tight timelines, one high test result in the middle of your deal — here's exactly how radon works in a North Dakota home sale, and how fast it can be fixed.

Call (701) 401-5204
Serving Bismarck, Mandan & every surrounding town
Pre-Closing Installs
48-Hour Verification Tests
Agent Coordination
Documentation Packet Included

Deal in Motion? Start Here.

Tell us the closing date and the test result and we'll build the schedule backward from it. Call (701) 401-5204.

  • Install scheduled inside the week
  • Verification test and paperwork before walk-through
  • Firm written pricing your agent can share

Radon Is Now Part of Every North Dakota Home Sale — By Law

On August 1, 2025, North Dakota's radon disclosure law took effect. Under NDCC § 47-10-02.2, a seller must disclose in writing any knowledge of radon concentrations in the property before the sale agreement is signed. If the home has been tested, the seller must attach the results that are reasonably available — and evidence of any mitigation work — to that disclosure. The North Dakota Real Estate Commission's Seller's Property Disclosure form carries the radon section now, and every agent in Bismarck is filling it out on every listing.

That changed the radon conversation in this market more than any statistic ever did. A high test result is no longer something a seller can quietly forget — it's on the form, permanently. And a verified mitigation system is no longer invisible plumbing — it's documentation that answers the form's hardest question in one attached page.

If You're Buying: Test Before You Close

Burleigh and Morton counties are EPA Zone 1 — like every county in North Dakota — and the state DEQ reports 63 percent of homes statewide test above the 4.0 pCi/L action level. In this market, skipping the radon test isn't optimism, it's buying a coin flip weighted against you. A professional 48-hour test slots inside a normal inspection window, and it's the only number the disclosure form can't tell you: what the house reads right now, measured by a device working for you.

If You're Selling: Get Ahead of the Form

The sellers who lose money on radon are the ones who learn their number from the buyer's inspector, ten days before closing, with zero leverage and a deadline. The sellers who don't are the ones who tested first. Test before you list: if it's low, you disclose with confidence. If it's high, you fix it on your schedule, at a price you chose, and your disclosure form shows a mitigated home with a passing verification test attached. Under the new law, that paperwork works for you in every future showing.

How We Work a Closing Timeline

Real-estate radon work is deadline work, and we build the schedule around the contract, not the other way around. A typical pre-closing sequence: firm written quote from the test report and foundation details the day you call · installation inside the week · 48-hour verification test immediately after · documentation packet to both agents before the walk-through. Install day itself is three to five hours, and nobody has to move out.

One honest note: we are the mitigation side, not a home inspector, and the verification test we run on our own installs is quality control — for the transaction's independent test, use your inspector's monitor. That separation protects everyone, including you.

Closing Soon? The Schedule Starts Today.

Call with your closing date and test result — we'll tell you on the phone whether the timeline works, and put the price in writing.

(701) 401-5204

Radon & Real Estate — Common Questions

Do I have to disclose radon when selling a house in North Dakota?

Yes. As of August 1, 2025, North Dakota law (NDCC 47-10-02.2) requires sellers to disclose in writing any knowledge of radon concentrations in the property. If tests have been done, the seller must attach reasonably available results — and evidence of any mitigation — before the sale agreement is executed. The ND Real Estate Commission's disclosure form now includes it.

The radon test came back high before closing — who pays for mitigation?

It's negotiable, like any inspection finding. Commonly the seller credits the cost or has the system installed before closing; sometimes the buyer takes a price adjustment and handles it after. What matters is that a standard system is a known, fixed, four-figure cost — not an open-ended repair — so it shouldn't kill a deal.

Can you install a radon system fast enough for my closing?

Usually yes. A standard install is a single visit, and we schedule real-estate jobs ahead of routine work. Between install and the 48-hour verification test, allow about a week of calendar time to be safe.

Should I walk away from a house with high radon?

Almost never over radon alone. In a state where 63 percent of homes test high, walking away mostly means buying a different house with the same issue and less information. High radon is a solved problem with a predictable price — treat it like a worn furnace, not a foundation crack.

Does a radon mitigation system hurt resale value?

The opposite, especially now. Under North Dakota's disclosure law, a known high result follows the house. A documented system with a passing verification test turns the radon line on the disclosure form into a selling point — the question is already answered, in writing.

Is a house safe to buy after radon mitigation?

Yes — verified mitigation is the fix, not a patch. Ask for the post-mitigation test report showing the level below 4.0 pCi/L, and retest every couple of years like any mitigated home.

Tap to Call — (701) 401-5204