When people think about environmental concerns in a home, they often think about mold, asbestos, or buried oil tanks. But one of the most important — and most overlooked — issues in the Westchester County real estate market is radon.
Radon is invisible, odorless, naturally occurring, and surprisingly common in many parts of New York. In today’s competitive Westchester County housing market, understanding radon can help buyers protect themselves and help sellers avoid unnecessary deal stress during inspections.
What Is Radon?
Radon is a radioactive gas that forms naturally when uranium breaks down in soil and rock. It can enter homes through:
- Foundation cracks
- Basement floors
- Sump pits
- Crawl spaces
- Pipe penetrations
- Well water (less commonly)
Because you cannot see or smell it, testing is the only way to know whether a home has elevated radon levels.
Why Radon Matters
According to the EPA, radon exposure is the second leading cause of lung cancer in the United States behind smoking.
Elevated radon deserves attention. Radon exposure increases lung-cancer risk, and there is no known safe level of exposure. Proper mitigation can reduce radon levels; an elevated result should be evaluated and addressed with a qualified radon professional.
What Is Considered a High Radon Reading?
According to the EPA’s radon action-level guidance:
- At 4 pCi/L or higher: take action to reduce radon levels.
- Between 2 and 4 pCi/L: consider taking action to reduce radon levels.
- Below 2 pCi/L: a lower result does not mean zero risk.
pCi/L means picocuries per liter of air. Follow EPA testing guidance and consult a qualified radon professional about the results, mitigation and follow-up testing.
Some homes test significantly higher, especially in areas with rocky terrain or certain soil compositions.
Is Radon Common in Westchester?
Yes — radon can absolutely be found throughout the Westchester County area.
Certain communities with more rock formations and hillside terrain may experience higher concentrations, but elevated readings can happen almost anywhere. Importantly:
- A neighbor’s home testing low does not guarantee yours will
- Newer homes can have radon
- Older homes can have radon
- Finished basements may increase concern because people spend more time there
This is why radon testing is a standard part of many home inspections in the current Westchester County real estate market.
What Happens If Radon Is Found During a Home Inspection?
An elevated result needs a planned response based on valid testing and qualified professional guidance.
In reality, radon mitigation is usually a very solvable issue.
A typical mitigation system often includes:
- A vent pipe system
- A fan that redirects radon gas safely above the roofline
- Sealing certain foundation openings
System design, access, installation scope and timing vary by home. Obtain a written proposal and plan for post-mitigation testing rather than relying on a general installation timeline.
In many cases:
- Sellers agree to install a mitigation system before closing
- Buyers accept a credit
- The issue becomes just another inspection item to negotiate
Transaction outcomes depend on the findings, contract terms and agreed response. Do not dismiss a health concern or judge a party’s reasonableness based on whether they proceed.
What Sellers Should Know
If you are selling a home in Westchester County, consider being proactive.
Some sellers choose to:
- Conduct a radon test before listing
- Install a mitigation system in advance if needed
- Provide documentation to buyers upfront
A properly mitigated home is often viewed far more favorably than a home with unknown radon conditions.
Trying to hide or dismiss the issue usually creates more problems during negotiations.
What Buyers Should Know
Buyers should never skip radon testing simply because:
- The market is competitive
- The home is newer
- The basement looks clean
- The seller says there has never been an issue
Testing is relatively inexpensive compared to the overall cost of purchasing a home.
In today’s aggressive Westchester County housing market, buyers need to understand which inspection issues are catastrophic and which are manageable. Evaluate the result, mitigation design, cost and follow-up testing with a qualified radon professional; an agent does not determine health risk or system effectiveness.
The Bigger Picture
One of the biggest mistakes buyers make is assuming that any inspection issue automatically means they should walk away.
The reality is that almost every home has something:
- Radon
- Older electrical
- Aging HVAC systems
- Drainage concerns
- Permit issues
- Masonry cracks
- Roof wear
The key is understanding:
- Severity
- Cost
- Risk
- Negotiability
An experienced real estate agent can help buyers separate emotional reactions from actual deal-breaking concerns.
Final Thoughts
Radon is important, but it should not automatically create fear.
In the modern Westchester County real estate market, education and preparation are everything. Buyers should test. Sellers should be informed. And both sides should understand that elevated radon levels are often highly manageable with the right approach.
If you are buying or selling a home in Westchester County, working with experienced professionals who understand inspections, environmental concerns, negotiations, and local housing trends can make the process significantly smoother.
Verify Testing and Existing Mitigation
Ask for the test date, duration, device, placement, conditions and complete report. A neighboring home, a map or an old result does not establish this home’s current level. Follow the EPA homebuyer and seller guidance for transaction testing and qualified providers.
If a system exists, request installation and maintenance records and a current test. Agree on responsibility, completion, verification and contract timing with your attorney. A running fan or installed pipe alone does not confirm an acceptable radon result.
Matthew Gluck, founder and principal broker of NestEdge Realty, helps coordinate transaction questions. Explore buyer services and seller services; qualified radon professionals evaluate testing and mitigation.