Buying or selling a house is an exciting, but at the same time tiring experience. You have paperwork, inspection, and schedules. Among these, the radon inspection in real estate transactions should not be overlooked. This invisible gas poses a health hazard, and scheduling your radon inspection is more critical than most people think. So, you must get it right. Let us explore it further, so you can breathe better and sleep easier.
Why Timing for Radon Inspection in Real Estate Matters
Radon is odorless and colorless, and it is the second most significant cause of lung cancer after smoking. The EPA recommends radon testing, ‘during point of sale’ in all homes, wherever they are located. When elevated levels are detected, 4 pCi/L or higher, it is time to take mitigation measures before proceeding further.
This can eliminate delays, renegotiations, or the outcome of future deals.
Put the Radon Inspection in Your Contingency Period
As soon as your complete offer is accepted, you enter the contingency window, and now is the best time to have radon testing. Specialized inspections, such as radon, usually occur immediately after your general home inspection during that window.
Ensure to include in your contract:
- When the radon test gets done.
- Who pays for it (buyer, seller, or shared)?
- What tests will be used?
- How results are communicated and acted upon.
In case there is Already A Radon Test
Radon results are occasionally done by sellers. Provided they are recent and correctly done by a qualified person, in the lowest-occupiable space of the house, they can be acceptable.
However, retesting is a consideration in case:
- The test was conducted some years ago.
- This was not the work of a qualified professional.
- The seller didn’t use the basement for tests.
How About Preemptive Testing and Mitigation
When you sell, have a radon test performed before listing.
A clean outcome can be marketable. In case it is more than 4 pCi/L, address the issue in advance and include it in your disclosure. The customers appreciate transparency.
Long-Term vs. Short-Term Testing: The Difference
There are short-term tests (2 to 7 days), which are relatively fast and are often used in real estate transactions; however, uncertainty is involved.
Long-term tests (>90 days) provide a more reliable result since they even out radon variations. The EPA supports these in terms of accuracy.
Advice from a Redditor sums it up nicely:
“Radon levels fluctuate daily… you absolutely need to use a certified test kit that you leave in the house for 3 months straight.”
What Happens If Levels are High
High radon levels don’t imply a canceled deal. You can:
- Request the seller to install a mitigation system before closing.
- Request a discounted price or seller credit to cover the mitigation.
- Withdraw if the seller refuses to cooperate.
In one homebuyer’s story:
After high radon levels were identified, they were asked to sign a mitigation contract and place an escrow deposit until the lender was satisfied that their mitigation was complete, before closing.
Another case:
One seller was willing to install an active system in the event of high levels being detected, but the buyer expressed concern over timing; the sale needed to be closed soon.
Tips to Avoid Timing Traps
- Arrange to have a radon test performed shortly after the inspection to meet contingencies.
- Do not conduct radon testing during an inspection. The inspector might open the windows and alter the results. Instead, schedule it a day or two after the inspection.
- Test again after significant renovations or when you reoccupy the basements or finished crawl spaces.
Quick Checklist for Timing a Radon Inspection
| Stage | What to Do |
| Offer Accepted | Schedule a radon inspection during the contingency period |
| Seller Provides Test | Verify who conducted it, when, and where; retest if outdated or unqualified |
| Seller Before Listing | Test early; fix if high; use as selling advantage |
| Inspection Day | Avoid radial testing on inspection day—schedule after the inspector leaves |
| After Renovation | Retest if you’ve changed foundation, HVAC, or living levels |
Conclusion
Getting the timing right for a radon inspection in real estate transactions is a smart, safe, and strategic move. Mention the test during your contingency period, ensure your communication is clear, and take action when the results indicate a high level. This timing guide is essential when buying and selling a property to shield against health risks, avoid surprises, and keep the deal going smoothly.
Looking for a restful night and results you can trust? Turn to your local home inspection pros, Pro-Spect Inspection Services. Whether it’s scheduling a radon inspection in real estate transactions or delivering prompt, accurate reporting, we are on it. Maintain your health and protect your investment. Contact Pro-Spect FL to receive a comprehensive radon inspection and seal the deal with peace of mind.