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Home/Radon Testing/Montgomery County/Clarksburg, 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 Clarksburg 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 rate covers one Clarksburg residence. Book online or call with the full address, unit and access authority, and define separately occupied space before service.
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 Clarksburg.
New construction, an older house and an attached Clarksburg home all need a measurement of their own indoor air. Neither Montgomery County's map nor a builder's radon-resistant features supply a test result for the finished residence. Describe the lowest room that is or could be used regularly, including a basement bedroom, office or family area planned after purchase. The technician can then place the monitor for the actual layout instead of relying on the property's age.
For a Clarksburg appointment, give the complete address and a contact for both monitor placement and collection. The test runs at least 48 hours under closed-house conditions, with the device left undisturbed. If a new home is still being finished, schedule when normal occupancy conditions can be maintained. Tell us about a separate lower apartment, controlled community access or a purchase deadline when requesting dates so scope and reporting time are clear.
Radon testing guidance: Maryland Department of Health radon guidance, EPA guidance on newly built homes, EPA guide for home buyers and sellers.
01
Construction features are not a measured Clarksburg radon result.
02
Describe current and future use of basement rooms.
03
Choose dates when construction will not disrupt conditions.
Where we test in Clarksburg, and what to tell us
Clarksburg historic area
For an older home, focus on today's lower-room layout.
Clarksburg Town Center
For an attached home, identify the booked unit and entry contact.
Ten Mile Creek and Little Seneca areas
For a new home, confirm the finished living space is ready to test.
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.
Yes. EPA recommends testing even when a new home has radon-resistant features. The completed home's indoor reading must be measured.
Arrange the test when the living space is ready for normal conditions and work will not disturb the monitor. Discuss the completion schedule before booking.
A standard appointment covers one residence. Identify a separately occupied unit before booking so its testing scope and access can be confirmed.
Allow for placement, at least 48 hours of measurement, collection and a written report. Share the contract deadline when requesting an appointment.
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
