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Radon testing

Radon Testing in Tysons, 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

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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 Tysons?

A radon test in Tysons 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. A Tysons booking is priced for one residence. Testing another unit, retail suite, amenity area or common mechanical space requires separate authorization and a distinct scope.

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 Tysons.

Radon testing for Tysons condos and homes

Fairfax County's high-risk radon designation applies broadly, but it cannot tell you the reading inside a particular Tysons condo, apartment, townhouse or house. A test needs to measure the private residence being occupied or purchased. A common room or neighboring unit is not its substitute. Tell the technician the unit and floor, and describe any lower level that could be used regularly in a townhouse or detached home.

Tysons buildings often have controlled entry, so a useful booking includes the exact building and unit, front-desk or elevator instructions, and a contact for both monitor placement and collection. The monitor remains in place for at least 48 hours. Residents should follow closed-house instructions and avoid disturbing the device. If access hours change before pickup, contact the testing team promptly so the return visit can be arranged.

Radon testing guidance: Fairfax County Health Department radon guidance, Virginia radon risk-map guidance, EPA radon guidance for buyers and sellers.

McLean Metro station at dusk with Tysons office towers behind

01

Test the private unit

A lobby or neighboring condo cannot provide the booked dwelling's radon result.

02

Coordinate building entry

Confirm front-desk and elevator access for both technician visits.

03

Plan the full interval

The monitor needs at least 48 undisturbed hours before collection.

Where we test in Tysons, and what to tell us

  • Tysons Corner and The Boro

    For a condo, give the building, unit and front-desk access procedure.

  • Pimmit Hills

    For a house, describe the lowest room that could be used regularly.

  • McLean edge of Tysons

    For an attached home, identify the exact unit and any lower living space.

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 Tysons

Radon testing in Tysons, answered straight

Can a Tysons building's common area represent my condo?

No. The useful test is made in the private residence being bought or occupied. Give the exact building and unit so access and placement can be arranged there.

What building details should I send before a Tysons test?

Provide the unit and floor, front-desk or elevator procedures, and a person authorized to admit the technician. Confirm that the same access will work for collection after at least 48 hours.

How is a Tysons townhouse different from a high-rise unit?

For either property, the technician needs the exact dwelling. In a townhouse, describe the lowest room that could be used regularly; in a high-rise, identify the private unit and building-entry requirements.

What if access changes before monitor pickup?

Contact the testing team as soon as you know. The technician must be able to return to the same residence, collect the monitor and complete the report.

Book a radon test in Tysons

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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