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Radon testing

Radon Testing in Oakton, VA

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

Schedule a radon test Call (703) 450-6398

What our customers say

From our customer reviews.

They conducted the test right away and kept me informed every step of the way.

They arrived the day after I called, on time, set up the Radon test and left within 5 minutes.

Everything was handled so professionally, quickly and so easy to have our house tested for radon.

They found elevated radon in the home and numerous issues on the home inspection report which were remedied before I moved in.

Great service, very thorough inspection and highlighted items in a very approachable and organized manner.

How much does radon testing cost in Oakton?

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

We place the monitor

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

The monitor does the work

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

We collect it, read it, and write it up

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.

Radon testing for Oakton homes

Oakton is in Fairfax County, where health officials report that homes on the same street can have different radon readings. The county's Zone 1 label is a reason to test, not a substitute for a measurement at your address. The technician needs to know about the lowest level that could be used regularly, whether that is a present family room or a basement you plan to finish.

For an Oakton test, provide the exact house or unit, the person who can admit the technician twice, and any alarm, lockbox or pet details. The monitor stays in place for at least 48 hours. Follow the technician's closed-house instructions and choose a period when renovations or moving activity will not disturb the test room. If a previous test predates a major change in the home or how its lower level is used, ask whether retesting is appropriate.

Radon testing guidance: Fairfax County Health Department radon guidance, Virginia Department of Health indoor radon guidance, EPA radon zone map and testing note.

Same street, different results

A neighbor's test cannot answer what is happening inside your Oakton home.

Future room use

Mention a basement office, bedroom or family room planned for regular use.

Retest when appropriate

Discuss older results if the home or use of its lower level has changed.

Where we test in Oakton, and what to tell us

Vale Valley Estates, Foxvale
For Vale Valley Estates or Foxvale, describe any lower room planned for regular use.
Cinnamon Ridge
For Cinnamon Ridge, identify the booked home and brief occupants on the test interval.
Tattersall, Blakelee
For Tattersall or Blakelee, arrange a reliable contact for placement and collection.

We only perform testing, not mitigation.

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.

Before you book in Virginia

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.

Radon testing near Oakton

Nearby

Radon testing in Oakton, answered straight

What does the Oakton staff presentation actually establish?

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.

How should an Oakton owner describe a future lower-level room?

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.

What if an Oakton gate code changes during the test?

Send the replacement code to the office before collection and keep an authorized contact available. Do not relocate the monitor to make pickup easier.

When should remodeling end before an Oakton measurement?

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 a radon test in Oakton

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

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