Home/Radon Testing/Loudoun County/Leesburg, VA

Radon testing

Radon Testing in Leesburg, 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 Google reviews.

The whole experience was amazing! Everything was handled so professionally, quickly and so easy to have our house tested for radon.

Was professional and friendly and provided us with immediate information about our radon test. I would highly recommend this company.

How much does radon testing cost in Leesburg?

A radon test in Leesburg 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 rate applies to one Leesburg residence. Give the exact address and unit plus any historic-district access constraints. Confirm the retrieval contact before setup.

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 Leesburg.

Radon testing for Leesburg homes and buyers

Loudoun County's older EPA radon map label is moderate, but Virginia health officials say later results support a high-risk designation. Either way, a map cannot determine the radon level in a Leesburg home. Testing the property gives an answer a buyer or occupant can use. Describe the lowest room that could be used regularly, including a planned office, bedroom or family room below the main floor.

For a Leesburg test, give us the complete property address and identify the living space to be measured. This matters if a dwelling shares a building with a business, or if a basement is a separate rental unit. The monitor must stay in place for at least 48 hours, and the technician needs access for placement and pickup. Pick dates when occupants can follow the closed-house instructions and work in the selected room will not interrupt the test.

Radon testing guidance: Loudoun County indoor air quality and radon guidance, Virginia Department of Health radon guidance, EPA Map of Radon Zones.

Historic streetscape in Leesburg, Virginia

Property-specific result

A Leesburg test measures the booked dwelling, not the county map or a nearby home.

Confirm the space

Point out a lower room planned for regular use and any separately occupied unit.

Keep the test valid

Arrange both visits and prevent the monitor from being moved during the test period.

Where we test in Leesburg, and what to tell us

West Market Street neighborhoods
For a West Market Street address, confirm which residential rooms are part of the test.
North King Street and Vinegar Hill
For a North King Street property, explain any shared or separate entrance before scheduling.
South King Street and Town Branch area
For South King Street or nearby homes, provide a keyholder 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 Leesburg

Nearby

Radon testing in Leesburg, answered straight

Does a Leesburg historic building need a different test?

No. The technician follows the radon protocol using the building’s current accessible layout.

What if my Leesburg address is outside Town limits?

Provide the complete address; the historic-district statement will not be applied beyond its boundary.

Should restoration continue during monitoring?

No disruptive work should occur while the device is deployed.

Which room matters in a converted building?

The lowest room that could be used regularly matters, based on the present conversion and access.

Book a radon test in Leesburg

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