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How Often Should You Have A Radon Test Done For Your Home?

Radon isn’t something you can see, smell, or taste—but it’s one of the most important things to monitor in your home. According to the EPA, radon is the second leading cause of lung cancer in the United States, right behind smoking. Because levels fluctuate throughout the year, regular testing is the only way to know whether your home is safe.image asking how often should you test for radon in your home

So, how often should you actually have a radon test done in Chicago area?

Why Radon Testing Isn’t a “One and Done” Task

Radon levels naturally rise and fall based on weather, soil conditions, ventilation, and changes to your home. Even finishing a basement or installing new windows can shift the airflow and allow radon to accumulate. The CDC notes that radon can be found in every state and that levels vary widely—even between neighboring homes.

Because of that variability, consistent testing is essential for long-term health.

Recommended Radon Testing Frequency

Here’s what experts recommend:

  • Every 2 Years for Most Homes
    • The EPA suggests testing every two years to maintain an up-to-date understanding of your home’s radon levels. Seasonal weather changes can cause significant swings, so a biennial test keeps you informed.
  • After Renovations or Major Structural Changes
    • If you remodel a basement, add rooms, replace windows, or make foundation repairs, radon levels can shift. Test again after the project is complete.
  • After Installing a Mitigation System
    • If you’ve had high radon and installed a mitigation system, the EPA recommends retesting at least every two years—or sooner—to ensure the system continues working effectively.
  • During Real Estate Transactions
    • Home sellers and buyers should always request a radon test before closing. Many states, including Illinois, strongly encourage radon testing as part of the inspection process.

Why Winter Is the Best Time to Test

Cold weather means closed windows and doors—conditions that often trap radon indoors. That’s why winter typically produces the highest readings and the most accurate test results. The EPA specifically notes that winter testing can reveal radon problems that may be less noticeable in warmer months.

What Happens If Your Radon Levels Are High?

High radon doesn’t mean you need to panic—but you should act quickly. Certified radon professionals can install mitigation systems that effectively reduce levels by up to 99%. The National Radon Proficiency Program (NRPP) provides guidelines and standards for measurement and mitigation.

The Bottom Line

Radon testing isn’t just a checkbox—it’s an ongoing part of maintaining a healthy home. By retesting every two years (or sooner after renovations), you gain peace of mind knowing your indoor air is safe.

If you’re in the Chicago area and haven’t tested in a while, now is a perfect time—especially as temperatures drop and radon levels naturally rise.

Need a Thorough Home Inspection to Prepare for Winter?

Call us at 312-724-0500 or Order Online.

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