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Home/Radon Testing/Loudoun County/South Riding, 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 South Riding 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. One South Riding residence is included in the quoted appointment. Another condominium unit, accessory apartment or community facility requires separate permission and a distinct service scope.
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 South Riding.
Virginia Department of Health says Loudoun County should be designated high risk rather than moderate on the older EPA map and recommends testing individual homes. That correction supplies regional context for South Riding, not a result for a particular residence. Identify the lowest level that could be used regularly, including a room expected to become living or working space. The technician evaluates the actual layout and places the device where the requested household can preserve the measurement conditions.
South Riding Proprietary stated that the community had more than 6,300 homes and 28,000 residents when its overview was checked on September 9, 2026. Those figures apply to the South Riding community and are not a housing-form breakdown or a radon statistic. For an appointment, specify the property type, full unit designation and any association-controlled entrance. In a condominium or attached residence, distinguish the booked interior from shared rooms and separately occupied space.
Local background: South Riding Proprietary community overview, checked September 9, 2026, Virginia Department of Health Loudoun high-risk correction, EPA map purpose and property-testing guidance.
01
Describe lower spaces that may become an office, playroom or bedroom even if they are vacant today. Placement should answer the realistic use of the residence.
02
Confirm parking, entry credentials and permitted service hours for both visits. Give the team an alternate contact in case the desk cannot locate the authorization.
03
Tell agents and vendors where the monitor is located and preserve the preparation conditions for at least 48 hours. Document prolonged door opening or contact with the equipment.
Where we test in South Riding, and what to tell us
Tall Cedar Estates
At Tall Cedar Estates, tell the scheduler about any lower room planned for regular use after the sale. Current furnishings do not alone settle the placement level.
The Parks and Amberlea
For The Parks or Amberlea, register the technician with the association or building desk before arrival. Retrieval needs the same authorized route as setup.
Town Center and Edgewater
Near Town Center or Edgewater, avoid a test window crowded with showings, cleaners and deliveries. The selected area should remain available until collection.
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.
Virginia Department of Health corrects the older EPA map by saying Loudoun should be high risk rather than moderate. The county designation still cannot predict a South Riding home’s result.
No. The community source reports more than 6,300 homes and 28,000 residents, but it does not identify one residence’s layout, occupancy or indoor measurement.
Confirm the exact unit, the lowest regularly usable level within it, building-entry steps and management rules for equipment. Shared areas are outside the residence unless separately authorized.
Note the event, approximate time, duration and effect on doors, windows or the device. Send the facts to the technician and leave the equipment where it was placed.
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
