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Radon is a naturally occurring, colorless, odorless gas that can accumulate in homes, and it's worth understanding as part of your due diligence regardless of a property's age or type, since it's determined by geology and construction rather than simply how old or well-maintained a home is.
What Radon Actually Is and Why It Matters
Radon results from the natural breakdown of uranium in soil and rock, and it can enter homes through foundation cracks, gaps, or other openings, accumulating to varying degrees depending on the specific property and its construction. Long-term exposure to elevated radon levels is a recognized health concern, which is why testing is worth taking seriously.
Radon Levels Vary by Specific Property, Not Just General Area
Unlike some environmental factors that follow broader regional patterns, radon levels can vary meaningfully even between neighboring properties, depending on specific soil composition, foundation type, and construction details. This means a general assumption about an area's radon risk isn't a substitute for testing a specific home.
How Radon Testing Works
Testing typically involves placing a short-term or long-term monitoring device in the lowest livable level of a home, which measures radon concentration over the testing period. Short-term tests provide a quicker read, useful during a real estate transaction's timeline, while long-term tests offer a more complete picture of average levels over time.
When to Test During a Home Purchase
Radon testing is commonly conducted during the inspection or option period, alongside other due diligence, giving you time to review results and factor them into your decision or negotiation before your contract deadlines pass.
Understanding Test Results
The Environmental Protection Agency has established a specific action level above which mitigation is generally recommended. If a test comes back above this threshold, it doesn't mean the home is unsafe to purchase — it means mitigation is a reasonable and generally effective next step, similar to addressing any other identified home issue.
What Radon Mitigation Involves
A typical mitigation system uses a vent pipe and fan to redirect radon gas from beneath the home's foundation to the outside, before it can accumulate indoors. This is a well-established, generally effective solution for reducing radon levels to below the recommended action threshold.
Negotiating Radon Mitigation Into Your Purchase
If a test reveals elevated radon levels, this is a reasonable basis for negotiation — requesting the seller install a mitigation system before closing, or negotiating a credit to cover the cost yourself after taking ownership.
New Construction and Radon
Some newer homes are built with passive radon-resistant construction features already in place, which can reduce (though not eliminate) the likelihood of elevated levels, and some builders can activate these passive systems into an active mitigation system relatively easily if testing after move-in reveals a need.
Radon in Well Water
For properties with a private well, radon can also potentially be present in the water supply itself, which is a separate consideration from airborne radon and can be tested for specifically if you have concerns, particularly relevant for rural properties around Wilson County relying on well water.
Should Every Buyer Test for Radon?
Given that radon levels are specific to individual properties rather than predictable by general area, and testing is a relatively low-cost, straightforward process, many real estate professionals recommend it as a standard part of due diligence, regardless of a home's age, type, or location.
If you're buying a home in the Floresville area and want to include radon testing as part of your due diligence, I can help you arrange this alongside your other inspections during your option period.
Barbara Peterson Broker/Owner — United Country Real Estate | Texas Ranch and Home Floresville, TX 78114
📞 Barbara: 210-540-6487 🌐 www.txranchandhome.com 📅 Schedule a Free Buyer Consultation with Barbara