When you're excited about a potential new home in Asheville, Weaverville, Marshall, Mars Hill, or the surrounding Western North Carolina mountains, it's tempting to skip "extra" steps during inspections to save time or money. One common and dangerous oversight? Skipping the radon test...don't do it.

Radon is a naturally occurring radioactive gas that seeps into homes from the ground—it's odorless, colorless, and tasteless, so you can't detect it without testing. According to the U.S. Environmental Protection Agency (EPA), radon is the second leading cause of lung cancer in the U.S. (after smoking), responsible for about 21,000 deaths annually. For more details straight from the source, visit the EPA's official radon page: https://www.epa.gov/radon.

Why Radon Is a Serious Concern in Western North Carolina

Much of the Asheville area and surrounding mountain counties fall into EPA Radon Zone 1—the highest potential risk category, where predicted average indoor radon levels exceed 4 pCi/L (picocuries per liter), the EPA's action level for mitigation. (See the EPA's Radon Zone Map and state-specific info, including North Carolina: https://www.epa.gov/radon/epa-map-radon-zones and the North Carolina zone PDF: https://www.epa.gov/sites/default/files/2014-08/documents/north_carolina.pdf).

The region's geology—granitic rocks and soils in the Blue Ridge Mountains—creates higher natural radon potential in many counties, including Buncombe (Asheville), Madison, Yancey, and others. Levels can vary dramatically from home to home, even on the same block, due to foundation cracks, soil type, and home construction.

North Carolina does not require radon disclosure or testing in home sales, so sellers aren't obligated to test or mitigate. It is a material fact, if they are aware of it.

That puts the responsibility on you as the buyer.

The Costly Mistake: Assuming "It's Fine" Without Testing

  • Health Impact: Long-term exposure to elevated radon increases lung cancer risk significantly—especially for families with children or smokers.
  • Financial Impact: If you discover high levels after closing, you'll pay for mitigation (typically $1,600–$2,500 for a basic system) out of pocket. Prices vary, so speak with a radon mitigation expert for a quote. 
  • Missed Negotiation Power: A positive test during the inspection period lets you negotiate seller credits, repairs, or price reductions—options you lose if you skip testing.

Testing costs only $150–$300 in my area (often added to a home inspection), and results are usually known in a few days.

What Smart Buyers Do

  • Include radon testing in your inspection—many inspectors offer it as an add-on.
  • If levels are ≥4 pCi/L, the EPA recommends fixing the home; even 2–4 pCi/L warrants consideration.
  • Use certified testers (check your state radon program or EPA resources for professionals).
  • Retest after mitigation or annually, as levels can change.

Don't let this invisible threat slip through the cracks. A quick test help protects your family's health from this gas and might even give you some leverage in negotiations.

As your local real estate expert in Asheville and Western North Carolina, I always recommend radon testing to every buyer—it's a simple step for major peace of mind.

If you're looking to buy or sell your home in Asheville, Weaverville, Marshall, Mars Hill, or the surrounding areas, give me a call—I'd love to help you navigate this exciting (and sometimes unpredictable) market with confidence and local expertise.

Happy hunting!

Disclaimer: The information provided in this blog post is for general informational purposes only and is not intended as financial, legal, or real estate advice. Real estate markets are dynamic and can change rapidly; individual results may vary based on specific circumstances, location, market conditions, and other factors. Radon risks and recommendations are based on EPA, NCDHHS, and other public health guidelines; always test your specific home and consult certified professionals for testing/mitigation. Always consult with a qualified real estate agent, attorney, mortgage professional, or other appropriate advisor for personalized guidance. No guarantee is made regarding the accuracy, completeness, or timeliness of the information presented. This post does not constitute a solicitation or offer to buy or sell any property.