What Is Radon in Real Estate? What to Watch For
Radon is a naturally occurring radioactive gas that can rise from the ground and accumulate inside homes. It is colorless and odorless, making it impossible to detect without a specific test.
When buying or selling a home, you might hear about it during inspections. We found that many people overlook this invisible hazard until a test result forces the conversation. This gas comes from the breakdown of uranium in soil and can seep into any building.
- Radon is a serious health risk and the second leading cause of lung cancer.
- Testing is simple, inexpensive, and the only way to know your level.
- High levels can often be fixed with a professionally installed mitigation system.
- You should test any home, new or old, before you buy or sell.
Below, we break down exactly what radon is, how to test for it, and what to do if you get a high reading.
Radon in Real Estate: Essential Things to Watch For
Radon is a naturally occurring radioactive gas that can seep into homes from the ground. It’s invisible and odorless, so you can’t sense it. When buying or selling property, you need to know the basics to protect your health and make informed decisions.
What Is Radon and How Does It Affect Homes?
Radon forms from the decay of uranium in soil and rock. It’s a gas that can move through cracks in foundations and get trapped inside. Every home can have radon, regardless of age or style. We found that about 1 in 15 homes in the U.S. has elevated levels (EPA).
The Science Behind Radon Gas
Radon is part of a natural decay chain. Uranium breaks down into radon, which then emits radioactive particles. These particles can be inhaled and damage lung tissue over time. Many experts compare it to a slow, invisible leak that builds up without warning.
The gas is measured in picocuries per liter (pCi/L). The EPA recommends fixing homes with levels at or above 4 pCi/L. We found that even lower levels can pose risks, so testing is key.
How Radon Enters Buildings
Radon enters through cracks in floors, walls, and foundations. It can also come through gaps around pipes or in well water. Think of it like dust seeping under a door—small openings are enough. Homes with basements or crawl spaces are often at higher risk.
- Cracks in the foundation or floor
- Gaps around pipes, wires, or drains
- Openings in the wall or ceiling
- Well water that contains radon
Once inside, radon can concentrate to dangerous levels. A simple test can reveal if you have a problem.
Health Impacts of Radon Exposure
Radon is the second leading cause of lung cancer in the U.S., after smoking (CDC). Prolonged exposure increases your risk, especially for smokers. We found that many people don’t realize the danger until it’s too late.
Lung Cancer Risk and Other Effects
When radon gas is inhaled, it decays into radioactive particles that stick to lung tissue. Over time, this can cause cellular damage that leads to cancer. The risk is higher with longer exposure and higher levels. According to the National Cancer Institute, radon causes about 21,000 lung cancer deaths per year in the U.S.
There are no immediate symptoms of radon exposure. You might feel fine until years later when health issues arise. That’s why testing is so important—it’s a silent threat that needs attention.
Short
Conclusion
Radon is a serious but manageable health risk in any home. Because it is invisible and odorless, testing is the only way to know your exposure level. We’ve seen that high radon is common, yet it’s also something that can be effectively reduced. Your peace of mind and health are worth a simple test. Don’t wait for a real estate transaction to prompt action.
The single most important step you can take is to test your home. You can use a short-term DIY test kit or hire a professional. If the result is high, a qualified installer can put in a mitigation system to lower the levels safely. Protecting your home starts with knowing what’s in the air you breathe.
Frequently Asked Questions
Do I need to test for radon when buying a home?
Yes, you should always test, regardless of the home’s age or location. A seller’s test is good for their knowledge, but a new test during your inspection period protects you. Results give you the power to negotiate a mitigation system if needed.
What is the average cost to fix high radon levels?
A professional mitigation system typically costs between $800 and $1,500 for a standard home. The exact price depends on your home’s design and the radon entry points. We found this is a one-time investment that significantly reduces your long-term health risk.
How long does a radon test take?
A short-term test kit needs to be in place for 2 to 7 days for a preliminary reading. For a more accurate year-round average, a long-term test can stay for over 90 days. Both options are straightforward to use in your home.
Can a brand new house have high radon?
Absolutely. New construction is just as susceptible since the gas comes from the soil under the foundation. We recommend testing any home, new or old, as part of your due diligence. Some new builds even include passive radon systems.
Is radon dangerous if I don’t smoke?
Yes, radon exposure is the second leading cause of lung cancer for everyone. While smoking combined with radon multiplies the risk, non-smokers still face a significant danger. Protecting your household means testing and fixing high levels for all family members.