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Home/Radon Testing/Montgomery County/Olney, MD
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 Montgomery County
A radon test in Olney 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 Olney home or unit. Book online or call with the exact premises and access instructions, including any separate household needing its own 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 Olney.
An Olney owner or buyer needs a radon result from the actual residence. Montgomery County's map describes area potential, but cannot tell the indoor level at one house, townhouse or apartment. Tell the technician how the lowest room is used now and whether a basement bedroom, office or family area could be used regularly after purchase. In a multi-unit building, identify the private unit rather than relying on a common-area or neighboring result.
For an Olney appointment, give the full address, unit number if needed, and entry instructions for both monitor placement and collection. A private lane, gate, tenant or building desk may require advance coordination. The monitor stays undisturbed for at least 48 hours while occupants follow closed-house instructions. Avoid moving or renovation work near the test room, and share a contract deadline before choosing dates for collection and the written report.
Radon testing guidance: Maryland Department of Health radon guidance, EPA radon-zone map guidance, EPA guide for home buyers and sellers.
01
A Montgomery County map cannot measure this Olney residence.
02
Mention a basement room planned for regular occupancy.
03
Provide lane, gate or building instructions for both visits.
Where we test in Olney, and what to tell us
Fair Hill Farm and The Reserve
Describe the home's current lower-level use.
Lake Hallowell
Coordinate occupants for placement and pickup.
Olney Mill and Norbeck Grove
Give the exact dwelling and access details.
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.
Maryland's residential disclosure framework includes radon among the hazardous or regulated materials covered by an owner's actual knowledge for certain single-family residential property of four or fewer units. The statute has enumerated exemptions and does not itself require a radon test. County and municipal requirements may differ, so check the rules for the property's location and type before relying on an existing result.
Md. Real Property section 10-702. Current as of September 2026. General information, not legal advice.
No. Another property's reading does not establish your indoor radon level. Test the residence itself.
Tell the technician about its planned regular use, even if the room is unfinished today.
Give the complete address, unit if relevant, and any private-lane, gate, desk or key instructions for both visits.
Avoid work that may disturb the monitor or closed-house conditions. Discuss unavoidable work before scheduling.
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
