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Home/Radon Testing/Fairfax County/Reston, 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 Fairfax County
A radon test in Reston 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 standard home-test price applies to a detached Reston home or one individual townhouse or condominium residence; confirm scope and pricing when several units are involved.
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 Reston.
Fairfax County says radon readings can differ even among homes on the same street. Its high-risk map label supports testing in Reston, but a neighbor's report or a building-wide assumption cannot answer for your own residence. A test in the booked house, townhouse or condo supplies the useful result. Tell the technician about the lowest room that could be used regularly, including a lower space a buyer plans to use after moving in.
For a Reston condo or apartment, provide the building and unit number and explain how the technician will enter on both visits. A townhouse or detached home may need a lockbox, occupant or agent contact instead. The monitor remains in place for at least 48 hours; everyone with access should know not to move it and should follow the closed-house instructions. If a sale is pending, leave time for collection and the written report.
Radon testing guidance: Fairfax County Health Department radon guidance, EPA radon guidance for buyers and sellers.
01
Fairfax County's map and a nearby result cannot replace a Reston home's measurement.
02
For a condo, provide the building, unit and person authorized to admit the technician.
03
Building access must still work when the monitor is collected.
Where we test in Reston, and what to tell us
Lake Anne Village
For a Lake Anne unit, confirm the private residence and its entry route.
North Point, South Lakes, Hunters Woods
Describe any lower room planned for regular use in the booked home.
Reston Town Center
Give front-desk, elevator and unit access details for both visits.
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. Fairfax County reports that results can vary from house to house, including on the same street. Test the residence you occupy or plan to buy to learn its indoor level.
Provide the exact building and unit, the person who can authorize entry, and any front-desk or elevator instructions. The technician needs access for placement and again after the minimum 48-hour test.
Tell the technician about the lowest level that could be used regularly, even if a buyer plans to finish or occupy it later. The technician will select the test location after reviewing the actual layout.
Choose dates when occupants can follow the closed-house instructions. Tell tenants, cleaners and contractors where the monitor will remain, and contact the testing team if it is moved or conditions are interrupted.
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
