Fast 48-hour radon testing for homes, real estate transactions, rental properties, nursing homes, multifamily buildings, HUD-related projects, schools, childcare centers, and commercial properties across Montgomery County and the DMV.
Montgomery County residential tests are $125 flat rate. DC, Howard County, Arlington, Fairfax, Loudoun, Prince William, and Frederick are $150-$225 depending on area — see full pricing by area. Commercial and institutional projects are quoted by project.
RADON & CO helps homeowners, buyers, sellers, agents, landlords, property managers, facility teams, and commercial owners get clear radon testing results without a confusing process.
$125 in Montgomery County
Fast 48-hour professional radon testing for homeowners who want peace of mind and a clear electronic report.
Learn more →Buyer, seller & agent friendly
Built for contract timelines, Sentrilock access when authorized, and quick electronic report delivery.
Learn more →Landlord + property manager support
Testing for ground-contact rental units, basement units, and rental portfolios in Montgomery County.
Learn more →Facilities, offices & portfolios
Project-based radon testing for commercial buildings, property managers, institutions, and facilities.
Learn more →Financing environmental review support
Testing coordination and documentation for multifamily, affordable housing, and HUD-related projects.
Learn more →Classrooms, childcare & campuses
Testing plans for schools, childcare centers, private schools, religious schools, and facilities teams.
Learn more →Radon is a naturally occurring radioactive gas that can enter homes and buildings through foundations, slabs, crawl spaces, cracks, and other openings. Because radon is invisible and odorless, a professional radon test is the practical way to understand the radon level inside a specific property.
Commercial radon testing often requires more planning than a single home test. RADON & CO helps property teams coordinate testing plans, access, device placement, reporting and documentation.
Testing support for senior care, healthcare-related properties, resident safety documentation, and refinance projects.
Radon testing coordination for multifamily, affordable housing, public housing, and environmental review support.
Testing plans for classrooms, ground-contact rooms, childcare centers, private schools, and facilities teams.
Includes professional monitor placement, 48-hour testing, pickup, and electronic report.
Book NowFlat rate by area — see full pricing breakdown for Howard County, DC, Arlington, Fairfax, Loudoun, Prince William, and Frederick.
View PricingFor nursing homes, multifamily, schools, childcare, property portfolios, HUD-related projects, and commercial sites.
Request Quote“As a property manager in Montgomery County, these guys are my go-to when it comes to required radon testing for the properties I manage! They make it super easy to schedule and are always very responsive and fairly priced. They make my job so much easier!”
“If you are looking for a radon test, don’t hesitate to call Ali. He was very efficient, professional, and helpful. I called many places, and Ali was the only one who actually answered the phone. Nothing beats speaking to a real person. Highly recommended!”
“Not only does Radon & Co have the best prices around but the service is outstanding! They were easy to communicate with, always on time and had an extremely fast turnaround. Highly recommend and will definitely be using again!”
“A home inspector incorrectly tested the property and recommended a completely new radon system, but Ali came in, correctly placed the devices, followed the NRPP handbook, and immediately identified the mistakes ... Highly recommend for accurate radon testing and real estate transactions.”
“Ali with Radon & Co answered all my questions, had flexible scheduling and was quick to set up and remove equipment. Got results quickly in electronic format. Pricing was better than other options.”
“Radon Co was Awesome! I was in a time crunch and they totally did me a solid. Quick, professional and quality all around. Without hesitation I give the 5 stars.”
Every closed test we run feeds a live, interactive map of average radon levels by zip code across the DMV. It's real data, updated regularly, and free to explore.
Search your zip code, see the average, and understand why a good number nearby is never a reason to skip testing your own home.
RADON & CO is based in Montgomery County and serves residential and commercial clients throughout the county, with select service available in Washington DC, Northern Virginia, Howard County and nearby areas.
→ See real radon test averages by zip code on our interactive map
Most short-term professional radon tests run for at least 48 hours. RADON & CO places a digital continuous radon monitor, retrieves it after the test window, and provides a clear electronic report.
Residential radon testing is $125 flat in Montgomery County. Extended service areas are priced by distance: $175 for Howard County, North DC, Arlington, and Frederick City/Urbana; $200 for South DC, Fairfax County, and outer Frederick County; $225 for Loudoun and Prince William counties.
Yes. RADON & CO is built for real estate timelines and can coordinate with agents, authorized access, closed-house conditions, and electronic reporting.
Yes. RADON & CO supports commercial radon testing for multifamily buildings, nursing homes, assisted living facilities, schools, childcare centers, property portfolios, and HUD-related projects.
No. RADON & CO specializes exclusively in independent radon testing. If elevated radon levels are detected, we can help explain your results and recommend contacting a qualified radon mitigation professional. To avoid conflicts of interest, NRPP-certified radon measurement professionals are not permitted to perform mitigation on properties they test.