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Home/Radon Testing/Fairfax County/McLean, VA
Radon testing
A continuous monitor on the lowest level that could be used regularly, read every hour for at least 48 hours. The written result comes the day we collect it.
4.9 rating, over 4,000 reviews NRSB-certified technicians Serving Fairfax County
A radon test in McLean is $185, or $175 when it is added to a home inspection. That is the whole price: both visits, the monitor for the full 48 hours, and the written report with every hourly reading in it. The residential price covers one McLean home or unit. Book online or call with the exact address, unit and access contact when the property is attached, rented or managed.
Day 1
Drop-off
A technician places it on the lowest level that could be used regularly, following EPA placement limits and the intended use of the space, inside a two-hour arrival window. With a home inspection, placement happens during the inspection visit.
48 hours
The house stays closed
For a short-term real-estate test, EPA guidance calls for closed-building conditions for at least 12 hours before the test and throughout the measurement. Windows stay closed, exterior doors open only for normal entry and exit, and the monitor logs hourly readings that help document the test conditions during the minimum 48-hour measurement.
Day 3
Pick-up and report
A technician picks the monitor up in another two-hour window and pulls the full record on the spot. The written report reaches you the same day.
NRSB-certified technicians. Our own team, certified by the National Radon Safety Board, not a subcontractor.
EPA testing guidance. Placement, closed-house conditions and the 48-hour minimum follow it, and your average is read against the EPA action level of 4.0 pCi/L.
Continuous monitors. Airthings Corentium Pro instruments, logging every hour for the whole test.
Appointment times are requests until our team confirms them. What the number means, how to prepare the property and the eight questions everyone asks are on the radon testing page; this page is about McLean.
Fairfax County is EPA Zone 1. County potential supports testing, while the result must come from the individual McLean residence.
The County’s Kirby-sector plan says detached homes predominate outside the commercial center and also names Westmoreland Square and Hallcrest Heights townhouse developments. A townhouse appointment covers the booked unit, with its own accessible lowest regularly usable level. For an agent-managed sale, reserve time for placement, the measurement interval and retrieval. McLean Mews, The Hamptons and McLean Residential Townhouses provide additional named attached-home context at the commercial-center edge. Each appointment remains tied to the selected residence.
Local background: Fairfax County McLean plan, Kirby sector, Fairfax County McLean CBC plan, Virginia Department of Health radon guidance, EPA Map of Radon Zones.
01
The County’s Kirby-sector plan says detached homes predominate outside the commercial center and also names Westmoreland Square and Hallcrest Heights townhouse developments.
02
A monitor in one McLean townhouse records that residence. It does not establish the radon level in an adjoining home or across the wider development.
03
When an agent controls the property, confirm the lockbox or key procedure for placement and retrieval before the measurement begins.
Where we test in McLean, and what to tell us
Langley Farms, Chain Bridge Forest, Chesterbrook Woods
A townhouse appointment covers the booked unit, with its own accessible lowest regularly usable level.
Salona Village, Ballantrae Farms
For an agent-managed sale, reserve time for placement, the measurement interval and retrieval.
Recent rebuilds throughout
For an address in Recent rebuilds throughout, use the current floor plan and keep the selected area available for placement and retrieval.
We do not install radon systems, so we have nothing to gain from your number. If the result is at or above the EPA action level of 4.0 pCi/L, you choose who fixes it. Once the system is in, we can test again and tell you what it reads.
Virginia's residential disclosure statute directs the seller's disclosure statement to say that the owner makes no representation about whether the property is in an EPA Zone 1 or Zone 2 locality. It directs buyers to use due diligence, including reviewing EPA, Virginia Department of Health and NRSB information and ordering a radon inspection before settlement as the contract allows.
Va. Code section 55.1-703. Current as of September 2026. General information, not legal advice.
Yes. A McLean townhouse needs a result collected in that residence. A measurement from an attached neighbor or another home in the development does not represent the booked unit.
Describe whether the appointment is for a detached home or townhouse, the current floor arrangement and any low room that could be used regularly. The Kirby plan does not replace those property details.
No. Radon levels can differ between nearby residences, including attached homes. Use a properly conducted measurement from the McLean property involved in the decision.
Confirm who will provide entry for placement and retrieval, share lockbox or desk instructions, and notify occupants about the test period. Leave enough transaction time for both appointments and reporting.
Book online or call (703) 450-6398.
Schedule a radon test Request a price
NextDay Inspect
46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398
