Should You Test for Radon When Buying in Central Arkansas?

Do you need a radon test when buying a house in Central Arkansas?

Yes, you should test. Radon is a colorless, odorless gas that causes lung cancer, and the only way to know a home's level is to measure it. Most of Pulaski County and the surrounding Central Arkansas counties sit in EPA Radon Zone 3, the lowest-risk tier, but zone maps describe county averages, not your house. A short-term radon test added to your home inspection runs about $150 to $250, and if the result comes back at 4.0 pCi/L or higher, a mitigation system in the Little Rock area typically costs $780 to $1,250.

By Amanda Galbraith | September 23, 2026

Here's the part most Central Arkansas buyers don't know: Arkansas does not license, certify, or register anyone to test for or mitigate radon. The Arkansas Department of Health says so plainly in its own radon fact sheet. There is no state law regulating indoor radon and no state qualification standard for radon professionals.

That single fact changes how you should approach this. In states with radon licensing, you can hire almost anyone and the state has already vetted them. In Arkansas, that vetting is on you.

So the real question isn't "should I test." It's "how do I get a result I can actually trust, and what do I do with it once I have it?"

What the Arkansas Radon Map Actually Tells You

The Arkansas Department of Health publishes a county-level radon map built from indoor test results collected between 2001 and 2023. Statewide, 14 Arkansas counties fall in EPA Zone 2, where the predicted average indoor screening level is between 2 and 4 pCi/L. The other 61 counties, including most of Central Arkansas, fall in Zone 3, where the predicted average is under 2 pCi/L.

Reading that as "I'm in Zone 3, so I'm fine" is the mistake.

ADH puts the caveat right on the map: it shows county averages, not the radon level in your home, and levels vary widely from one house to the next. Two houses on the same street in Maumelle can test very differently depending on foundation type, soil under the slab, how tight the house is, and how the HVAC runs.

The average indoor radon level in Arkansas is about 2.5 pCi/L. The EPA action level is 4.0. So the state average sits in the range where EPA says you should consider reducing it — and every individual house is its own data point.

A few things that push a Central Arkansas home toward a higher reading:

• Slab-on-grade with cracks or an expansion joint — the most common foundation type in newer Maumelle, Sherwood, and Bryant subdivisions, and a direct entry path if the slab has settled
• Crawl spaces with exposed soil — common in older Little Rock and North Little Rock housing stock
• Finished basements or walk-out lower levels — less common here than up north, but the ones we do have are the lowest occupiable level, which is exactly where a real estate test gets placed
• Sump pits and utility penetrations that were never sealed

How a Radon Test Works in an Actual Transaction

This is where buyers get tripped up on timing, because a radon test is not a five-minute item on an inspection checklist.

A real estate radon test is a short-term test that runs a minimum of 48 hours under closed-house conditions. That means all windows and exterior doors stay closed except for normal entry and exit, and the house needs to be closed up for at least 12 hours before the test even starts. The device goes in the lowest occupiable level of the home — a basement, or a room over a crawl space.

Practically, that means:

1. Order it with your inspection. Most Central Arkansas inspectors offer radon as an add-on for roughly $150 to $250. Ordering it separately after the fact burns days you may not have.
2. Tell your agent to protect the timeline. If your inspection contingency is short, a 48-hour test plus lab turnaround can eat most of it. This is a conversation to have before the offer is written, not after.
3. Keep the house closed. If the seller has a showing during the test window and props the doors open, or a contractor runs a fan, the result is worthless and you start over.
4. Get the report in writing. You will need it if you are negotiating.

Because Arkansas has no licensing program, the ADH points homeowners to the two national proficiency programs the EPA recognizes: the National Radon Proficiency Program (NRPP) and the National Radon Safety Board (NRSB). Ask any tester or mitigator for their NRPP or NRSB certification number before you hire them. That is the closest thing to a credential you are going to get in this state, and it is worth asking for. It's the same instinct you'd apply to any inspection — knowing what to expect from a home inspection in Central Arkansas makes the radon add-on an easy call rather than a surprise.

What It Costs to Fix It

If the test comes back at 4.0 pCi/L or higher, the standard fix is a sub-slab depressurization system: a pipe through the slab, a fan, and a vent above the roofline that pulls soil gas out from under the house before it gets inside.

In the Little Rock area, that system typically runs $780 to $1,250, with roughly $1,000 being a fair middle. Nationally the range is wider, $850 to $2,800, because basements and crawl spaces cost more to treat than a simple slab. Crawl space encapsulation, if that's what your house needs, is a much bigger number.

Ongoing costs are small. The fan uses $40 to $150 of electricity a year, systems last 10 to 20 years, and the fan itself gets replaced every 8 to 12 years for $250 to $600.

Put that next to a $300,000 Maumelle purchase and it's a rounding error — which is exactly why this is one of the easier things to negotiate. In most transactions where a test comes back high, the seller either pays for mitigation or gives a credit at closing. The test is usually the buyer's expense as part of the inspection. The fix is usually the seller's.

And unlike a lot of inspection items, the seller has a real incentive to say yes. Which brings us to the part sellers need to hear.

If You're Selling: Arkansas Is a Caveat Emptor State, With a Catch

Arkansas does not require a written seller's disclosure form. The Seller's Property Disclosure is optional here, and Arkansas courts have historically enforced caveat emptor — let the buyer beware.

Do not read that as permission to stay quiet.

If you know about a material defect that affects value, you are expected to disclose it, and environmental hazards including radon, mold, asbestos, and lead paint fall squarely in that category. Your licensed agent has an independent obligation under Arkansas Real Estate Commission rules to disclose known material issues to buyers. So if you have a radon test result sitting in a drawer showing 6.2 pCi/L, that number does not disappear because the disclosure form is optional. (The same logic applies to what a Seller's Property Disclosure covers in Arkansas and to the federal lead paint disclosure rules on pre-1978 homes, which are not optional at all.)

Here's what I tell sellers who ask me about this: testing before you list is usually the stronger play. If it comes back low, you have a clean number to hand any buyer who asks and one fewer thing that can blow up a deal at day 12. If it comes back high, you mitigate for around a thousand dollars on your own timeline, with your own contractor, instead of under a contingency clock while a nervous buyer's agent negotiates against you.

A mitigation system already installed and documented is a selling point, not a red flag. The EPA says so directly. A failed test discovered during someone else's inspection period is a very different conversation — and it tends to cost more than the system would have. That's the same math behind deciding which home improvements are actually worth it before selling in Central Arkansas: spend the small money before you list, not the big money after.

Frequently Asked Questions

Is radon a real problem in Little Rock and Maumelle, or is this a northern thing?

It's real, just less common than in high-radon states. Most of Central Arkansas is EPA Zone 3, where the predicted county average is under 2 pCi/L, and the Arkansas statewide average is about 2.5 pCi/L. But radon has been found in all 75 Arkansas counties, and a low county average tells you nothing about a specific house. Test the house, not the map.

Who pays for the radon test, the buyer or the seller?

The buyer almost always pays, because it's ordered as an add-on to the buyer's home inspection and runs about $150 to $250. If the result comes back at or above 4.0 pCi/L, the mitigation cost is typically negotiated onto the seller, either as a repair or as a closing credit.

Does Arkansas require a radon test to sell a house?

No. Arkansas has no law requiring radon testing, disclosure, or mitigation, and the state does not license radon professionals. Testing is voluntary for both buyers and sellers. That said, if you already know a home has elevated radon, that's a known material defect, and you and your agent are expected to disclose it.

How long does a radon test take, and will it delay my closing?

The test itself runs a minimum of 48 hours under closed-house conditions, plus lab turnaround. Built into a normal inspection period it's a non-issue. Ordered late, or on a short contingency, it can absolutely put pressure on your timeline — which is why we order it with the inspection, not after.

What if the test comes back just under 4.0?

EPA's action level is 4.0 pCi/L, but it also recommends considering mitigation anywhere between 2.0 and 4.0. There's no risk-free level. A reading of 3.6 in a house where the kids' bedrooms are on the lowest level is a different decision than 3.6 in a house where nobody spends time down there. That's a judgment call, and it's worth making it deliberately rather than by default.

The Short Version

Test. It's cheap, it's fast when you plan for it, and in a state with no radon licensing and no mandatory disclosure, the test result is the only thing that actually tells you anything. If it's low, you've bought certainty for $200. If it's high, you've found a roughly $1,000 problem before it became your problem.

If you're buying or selling in Maumelle, Little Rock, North Little Rock, Sherwood, Bryant, or Benton and you want help deciding whether to test, when to order it, and how to handle the result in negotiation, reach out. This is exactly the kind of thing I walk clients through before we write an offer or go live on the MLS.

Sellers: download the free Central Arkansas Home Sellers Guide for the full pre-listing checklist, including the inspection items worth handling before a buyer ever sees them.

About Amanda Galbraith

Amanda Galbraith is a residential real estate agent serving the greater Little Rock area. She specializes in helping first-time sellers navigate the process from pricing to closing, as well as investors looking to increase their portfolio. Connect with Amanda at www.amandagalbraith.ar-property.com.

Arkansas Property Management & Real Estate | www.ar-property.com

This article is general information about the home buying and selling process and is not legal, medical, or tax advice. Radon levels vary by home; consult a certified radon professional and, where appropriate, an attorney or tax advisor about your specific situation. Equal Housing Opportunity.