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Home/Radon Testing/Baltimore County/Randallstown, 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 Baltimore County
A radon test in Randallstown 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 home-test rate applies to one Randallstown residence. Book online or call with the unit number, entry contact and scope if the property contains more than one dwelling.
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 Randallstown.
A Randallstown radon result must come from the residence that needs the report. Baltimore County's zone designation and a nearby reading cannot establish the indoor level of a specific house, townhouse or apartment. Describe the lowest room used or suitable for regular occupancy, including a basement bedroom or office planned after the sale. If a building contains a separate lower apartment, identify the private dwelling to be tested and whether both units need results.
Provide the full Randallstown address, unit number if applicable, and an owner, resident or manager who can admit the technician for monitor placement and collection. The device remains undisturbed for at least 48 hours while occupants follow closed-house instructions. Schedule moving, cleaning or repairs so they do not disrupt the test room. Share any contract or lease deadline when booking so there is time for pickup 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 county map or another unit cannot measure the booked home.
02
Mention a room that may become a bedroom or office.
03
Arrange both access times and protect the monitor.
Where we test in Randallstown, and what to tell us
Church Lane
Describe lower-room use and who can provide entry.
Allenswood Road area
For a managed unit, provide building and private-unit details.
Liberty Road
Coordinate residents or an agent 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.
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. Indoor levels can differ, so test the specific residence needing the result.
Tell the technician before placement. A room suitable for regular occupancy may affect the test level.
Give the exact unit and authorized contact, with entry available for placement and collection.
Avoid activity that disturbs the device or closed-house conditions. Discuss timing 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
