1. Why First-Time Buyers Need to Know About Radon
If you are buying your first home, radon is probably not on your radar. Most first-time buyers have never heard of it, or they assume it is only a problem in other parts of the country. Both assumptions can be costly.
Radon is a naturally occurring radioactive gas that seeps into homes from the soil beneath the foundation. You cannot see it, smell it, or taste it. But long-term exposure to elevated radon is the second leading cause of lung cancer in the United States, responsible for an estimated 21,000 deaths per year according to the EPA.
In Georgia, the risk is real. Approximately 1 in 5 homes across the state test above the EPA action level of 4 pCi/L (picocuries per liter). In some Metro Atlanta counties, the numbers are even higher due to the uranium-bearing granite bedrock common throughout north Georgia.
The good news: radon testing is quick, affordable, and part of the standard due diligence process for Georgia home purchases. And if elevated radon is found, it is a solvable problem with well-established mitigation technology.
2. When to Test During the Buying Process
Timing matters when it comes to radon testing during a home purchase. In Georgia, you have a limited due diligence period (typically 7 to 14 days after the binding agreement is signed) to complete inspections and investigations. Radon testing needs to fit within that window.
Schedule radon testing with your home inspection
The best approach is to have the radon test placed at the same time as your general home inspection. This way the 48-hour test runs concurrently with your inspection period rather than eating into additional days.
Closed-house conditions must be maintained
For accurate results, windows and exterior doors must remain closed for 12 hours before the test begins and throughout the 48-hour testing period. Your agent should communicate this to the seller and listing agent. Normal entry and exit through doors is fine.
Results come back within 48 to 72 hours
A professional continuous radon monitor (CRM) is placed on the lowest livable level of the home. After 48 hours, the monitor is retrieved and results are available immediately or within 24 hours, giving you time to review before your due diligence period expires.
Review results and negotiate if needed
If results are below 4 pCi/L, no action is needed. If results are at or above 4 pCi/L, you can negotiate with the seller for mitigation or a closing credit. Your real estate agent can guide this process.
Do Not Skip Radon Testing
Some buyers skip radon testing to save $150 or because their agent did not mention it. This is a mistake. You could end up in a home with radon levels 5, 10, or even 20 times the safe limit, and you would never know without testing. The cost of mitigation after closing comes entirely out of your pocket if you did not negotiate it during the buying process.
3. What It Costs and Who Pays
Radon testing costs during a home purchase are straightforward. Here is a clear breakdown.
Professional Radon Test: ~$150
The buyer pays for the radon test as part of due diligence, just like the home inspection. A professional test uses a continuous radon monitor that records hourly readings over 48 hours. This gives you detailed data, not just a single number. Some home inspectors offer radon testing as an add-on for a slightly lower price.
Radon Mitigation (If Needed): $1,200 to $2,500
If elevated radon is found, mitigation costs are negotiable. In a balanced market, many sellers will either install a mitigation system before closing or provide a credit of $1,200 to $2,500 toward the cost. In a strong seller's market, you may need to absorb some or all of the cost. Your agent will advise on what is reasonable given current market conditions.
Common Negotiation Outcomes
In practice, most radon negotiations in Georgia end with one of three outcomes: the seller installs a mitigation system before closing (most common), the seller provides a closing credit equal to the estimated mitigation cost, or the buyer and seller split the cost. It is rare for a seller to refuse any accommodation, because disclosure obligations mean the next buyer will likely find the same issue.
4. How to Read Your Radon Test Results
Your radon test report will show a number measured in picocuries per liter (pCi/L). Here is how to interpret that number.
Below 2 pCi/L
Low risk. This is a good result. The average outdoor radon level is about 0.4 pCi/L, and the average indoor level nationally is about 1.3 pCi/L. No action needed, but retest every few years as levels can change.
2 to 3.9 pCi/L
Moderate. Below the EPA action level but still above the preferred level. The EPA suggests considering mitigation in this range, especially for sensitive individuals. Not typically a deal issue in a real estate transaction, but worth noting.
4 to 10 pCi/L
Above the EPA action level. Mitigation is recommended. This is a common finding in Georgia and is easily addressed with a standard mitigation system. You should negotiate with the seller for remediation.
Above 10 pCi/L
High levels. Mitigation is strongly recommended before occupancy. Standard mitigation systems are effective even at high levels, but you should negotiate firmly for the seller to address this. Levels this high represent meaningful health risk with long-term exposure.
Your report will also include hourly readings. It is normal to see significant variation over the 48-hour test period. Radon levels fluctuate throughout the day based on weather, air pressure, and HVAC operation. What matters is the average over the full test period, not any single hourly reading.
5. What to Do If Radon Is Found
Finding elevated radon in a home you want to buy can feel alarming, but it should not be a deal-breaker. Radon mitigation is a proven, well-established process that effectively reduces radon levels by 95 to 99 percent in most homes.
Here is a step-by-step approach if your test comes back at or above 4 pCi/L:
Do not panic
Elevated radon is common in Georgia. About 1 in 5 homes test above 4 pCi/L. The health risk from radon is cumulative over years of exposure, not immediate. You have time to address this properly.
Get a mitigation estimate
Contact a professional radon mitigation company for an estimate. Most can provide a quote based on the home's foundation type and layout. This gives you a real number to use in negotiations with the seller.
Negotiate with the seller
Through your agent, request that the seller either install a mitigation system before closing or provide a closing credit to cover the cost. Include the mitigation estimate as documentation. Most sellers are reasonable about this because they know the next buyer will find the same issue.
Verify after mitigation
If the seller installs a system before closing, request a post-mitigation radon test to confirm levels are below 4 pCi/L. If you receive a credit and install the system yourself after closing, test within a few weeks of installation to verify effectiveness.
Perspective on Radon in Home Buying
A home with a radon mitigation system installed is actually in better shape than a home that has never been tested. You know the problem and you know it has been solved. Many homes across Georgia have radon systems, and they do not affect home values. In fact, some buyers prefer knowing the home has been tested and mitigated.
6. Georgia-Specific Considerations
Georgia has some unique factors that first-time buyers should understand.
Due Diligence Period
Georgia uses a due diligence period rather than contingencies for inspections. This means you can walk away for any reason during this period (typically 7 to 14 days), but you forfeit your due diligence fee. Radon testing should be scheduled immediately after going under contract to fit within this window.
No State Radon Disclosure Law
Georgia does not require sellers to disclose known radon levels. The standard Georgia property disclosure form asks about environmental hazards generally, but there is no specific radon question. This makes buyer-initiated testing even more important because you cannot rely on the seller to volunteer this information.
North Georgia Higher Risk
Counties in the Metro Atlanta area and north Georgia (Fulton, DeKalb, Cobb, Gwinnett, Cherokee, Forsyth) sit on granite bedrock that produces higher levels of radon. If you are buying in these areas, radon testing is especially important. Southern Georgia counties generally have lower radon risk, but testing is still recommended.
Foundation Types
Georgia homes feature a mix of slab-on-grade, crawl space, and basement foundations. All types can have radon issues, but basements tend to show the highest levels because they have more soil contact. Crawl space homes can also have significant radon if the crawl space air seeps into living areas through floor gaps and utility penetrations.
7. Your Complete Radon Checklist
Save or print this checklist to keep track of radon-related tasks during your home purchase.
