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Radon testing

Radon Testing in McLean, 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.

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

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

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

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

Elizabeth Anne NewberryCustomer review
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How much does radon testing cost in McLean?

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

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.

National Radon Safety Board

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.

Radon testing for McLean homes

McLean is in Fairfax County, where the health department says indoor radon can vary from house to house. The county's high-risk map label supports testing, but it cannot tell you the level inside a McLean residence. A new or extensively renovated home still needs its own measurement. Tell the technician about any lower bedroom, office or recreation room that is or may become regular living space.

To arrange a McLean radon test, identify the exact home and a contact who can grant access twice. The monitor remains in place for at least 48 hours between placement and collection. If an agent manages the property, supply lockbox, alarm and pet details in advance. Tell us about a separate guest dwelling or rental unit when booking, since testing the main house does not automatically measure a second living space.

Radon testing guidance: Fairfax County Health Department radon guidance, EPA radon and real-estate guidance, Virginia Department of Health radon guidance, EPA Map of Radon Zones.

Buildings beside an elevated transit line in the McLean area

01

House-specific evidence

A nearby result and the county map cannot tell you your McLean home's radon level.

02

Rebuilt or new homes

Construction age does not remove the need to test the finished living space.

03

Separate living units

Mention a guest house or rental apartment so the right testing scope can be arranged.

Where we test in McLean, and what to tell us

  • Langley Farms, Chain Bridge Forest, Chesterbrook Woods

    For Langley Farms or Chesterbrook Woods, describe the home's lowest regularly usable room.

  • Salona Village, Ballantrae Farms

    For Salona Village or Ballantrae Farms, confirm any separate living space before booking.

  • Recent rebuilds throughout

    For a recently rebuilt McLean home, arrange a test of the completed residence.

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 McLean

Radon testing in McLean, answered straight

Does a townhouse need its own reading?

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.

What should a Kirby-sector owner describe?

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.

Can a neighbor’s result represent my home?

No. Radon levels can differ between nearby residences, including attached homes. Use a properly conducted measurement from the McLean property involved in the decision.

How do agents coordinate both visits?

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 a radon test in McLean

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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