(703) 450-6398 Free Quote Schedule
Schedule Free Quote

Home/Radon Testing/Loudoun County/Sterling, VA

Radon testing

Radon Testing in Sterling, 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 Loudoun 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
View on Google

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

Catherine HRadon testing
View on Google

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

Alma PrinceRadon testing
View on Google

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
View on Google

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

Elizabeth Anne NewberryCustomer review
View on Google

How much does radon testing cost in Sterling?

A radon test in Sterling 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 Sterling 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 Sterling.

Radon testing for Sterling homes

Virginia health officials say Loudoun County has higher radon potential than the older EPA map designation suggests. That finding supports testing in Sterling but does not determine one home's reading. The result must come from the residence being occupied or bought. A Sterling townhouse, detached house or apartment may have a different layout, so describe the lowest room that could be used regularly and any lower space the next occupant plans to use.

For a Sterling radon test, supply the full address, building and unit if applicable, and a contact who can grant entry on both visits. The monitor stays in place for at least 48 hours. Follow the technician's closed-house instructions and choose dates when cleaning, moving or repairs will not disturb it. If a separate basement apartment is included in the property, mention it before booking so the right testing scope can be arranged.

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

A residential street in Sterling after snow

01

Loudoun risk is not a result

Test the Sterling residence itself, regardless of construction age or neighborhood.

02

Name every dwelling

A separate apartment needs its own scope discussion before the visit.

03

Keep the monitor still

Coordinate occupants and work crews for the full measurement period.

Where we test in Sterling, and what to tell us

  • Sterling Park

    Describe any lower living room, bedroom or office intended for regular use.

  • Cascades and Sugarland Run

    For an attached home, identify the exact residence and entry contact.

  • Potomac Falls and Lowes Island

    Share visitor, alarm or keyholder instructions for both visits.

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 Sterling

Radon testing in Sterling, answered straight

Does a newer Sterling home need radon testing?

Yes. Construction age and the county risk label do not reveal the indoor level in a specific home. A test of the finished residence provides its own result.

Can a basement apartment be included with the main Sterling home?

Tell us about a separately occupied lower unit before scheduling. A standard appointment is for one residence, so the additional space, access and price need to be confirmed.

What should occupants do while the monitor is in place?

Follow the technician's closed-house instructions for the test period and leave the device undisturbed. Tell the testing team if someone moves it or conditions are interrupted.

When will a Sterling seller get the result?

The test requires at least 48 hours between placement and collection, followed by the written report. Share your transaction deadline before selecting appointment dates.

Book a radon test in Sterling

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

Call Schedule