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Home/Radon Testing/Fairfax County/Oakton, 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 Oakton 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. Standard pricing is for one Oakton residence. Additional dwelling units or separately controlled apartments need to be identified before scheduling for a clear scope and quote.
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 Oakton.
Fairfax County falls within EPA radon Zone 1, but a regional map category does not answer the measurement question for an Oakton home. EPA cautions against using the zone map to determine whether one property should be tested. At setup, review the lowest level that could be used regularly and any lower room expected to change use after purchase. The technician considers the residence’s real configuration and chooses a location where the device can remain secure and clear of drafts or direct interference.
A Fairfax County staff presentation dated October 2, 2023, classifies present-day uses near the AT&T Oakton site as single-family or townhomes and multifamily residential. This is nearby-site planning context, not a community-wide inventory and not proof of any particular address’s housing form. Owners should describe their own building, including whether the lower area is finished, separately occupied or inaccessible. Buyers should also confirm who can authorize both visits rather than relying on the cited land-use categories.
Local background: Fairfax County AT&T Oakton staff presentation dated October 2, 2023, Virginia Department of Health indoor radon guidance, EPA radon zone map and testing note.
01
Complete flooring, drywall or painting in the planned test area before placement. Then preserve normal operation and the instructed building conditions throughout the minimum 48-hour collection period.
02
Tell residents, guests and service providers that the equipment must not be moved, covered or unplugged. Report an accidental contact with the approximate time instead of resetting the device.
03
Send gate codes, driveway notes and a backup phone number before dispatch. Confirm that the same route remains available when the technician returns for retrieval.
Where we test in Oakton, and what to tell us
Vale Valley Estates, Foxvale
In Vale Valley Estates or Foxvale, identify any lower room being remodeled for future daily use. Schedule after dusty work and repeated exterior-door traffic have ended.
Cinnamon Ridge
For Cinnamon Ridge, make sure all occupants know the device location and the collection date. A note near the room can prevent cleaning or storage activity from disturbing it.
Tattersall, Blakelee
Near Tattersall or Blakelee, verify access across long driveways, gates or private entrances before the appointment. Provide a reachable on-site contact when navigation is not straightforward.
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.
It documents land-use categories near one AT&T Oakton site as of October 2, 2023. It does not classify every Oakton home or provide evidence of indoor radon conditions.
Explain the planned use, current finish, access and whether occupants could spend time there regularly. The technician can then consider that level when selecting the measurement location.
Send the replacement code to the office before collection and keep an authorized contact available. Do not relocate the monitor to make pickup easier.
Complete work that creates dust, strong airflow or frequent open-door traffic before setup. Choose a later window when the building can operate normally and the device can remain undisturbed.
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
