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Home/Radon Testing/Loudoun County/Sterling, VA
Radon testing
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
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
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
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
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 Sterling.
Virginia Department of Health says Loudoun County should be designated high risk rather than moderate on the older EPA map. A Sterling home still needs its own properly collected reading.
Loudoun County describes Sterling Park as a planned community and Sugarland Run as including single-family homes and townhouses. Those findings apply to the named communities. A townhouse or rental test is limited to the booked residence; confirm unit boundaries and keyholder access. Choose a quiet interval when occupants can maintain required closed conditions and leave the monitor undisturbed.
Local background: Sterling primary housing context, Virginia Department of Health radon guidance, EPA Map of Radon Zones.
01
Loudoun County describes Sterling Park as a planned community and Sugarland Run as including single-family homes and townhouses. Those findings apply to the named communities.
02
At a Sterling townhouse, name the occupant, agent or manager who can provide entry for setup and pickup. A neighboring key or result cannot be substituted for the booked home.
03
Follow the technician instructions for building conditions, leave the device in place and report any unavoidable interruption during the measurement period.
Where we test in Sterling, and what to tell us
Sterling Park
A townhouse or rental test is limited to the booked residence; confirm unit boundaries and keyholder access.
Cascades, Sugarland Run
Choose a quiet interval when occupants can maintain required closed conditions and leave the monitor undisturbed.
Potomac Falls, Lowes Island
For an address in Potomac Falls, Lowes Island, use the current floor plan and keep the selected area available for placement and retrieval.
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.
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.
No. Planned-community history does not determine the testing level. Placement follows the current Sterling residence and its lowest room that could be used regularly.
Use the complete address, identify the individual townhouse and provide the person authorized to open it twice. Mention a tenant or separate living unit when either affects scope.
Leave the monitor in place, note what happened and when, and tell the technician at retrieval. The technician will assess whether the interruption affects use of the measurement.
No. Nearby residences can produce different radon readings. A decision about the Sterling property should rely on a properly conducted test in that property.
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
