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Home/Radon Testing/Montgomery County/Silver Spring, 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 Silver Spring 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 listed price is for one Silver Spring residence. Identify the apartment or condominium unit and access contact when relevant. For a multilingual household or absentee owner, choose one contact who can relay test instructions to everyone entering the unit.
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 Silver Spring.
EPA places Montgomery County in Zone 1 but cautions that a zone cannot predict one property. Silver Spring owners and buyers should rely on a test in the residence.
Montgomery Planning identifies the Silver Spring Central Business District as a distinct planning area. Use the complete address because Silver Spring service locations extend beyond that planning boundary. Downtown towers, managed garden apartments and houses create different entry routines without predicting different radon results. Confirm whether an elevator, concierge, tenant notice or lockbox is involved. At Woodside, Four Corners and the Takoma Park or Wheaton edges, provide the exact address so the appointment follows the correct residence rather than a broad postal label.
Local background: Silver Spring primary housing context, Maryland Department of Health radon guidance, EPA Map of Radon Zones.
01
The County planning area is useful downtown context, not a floor-plan description for an individual unit.
02
Coordinate both visits with the resident and any front desk or property manager.
03
Notify occupants so the monitor is not moved, covered or unplugged.
Where we test in Silver Spring, and what to tell us
Woodside, Four Corners
For Woodside or Four Corners, prepare the lowest room that could be used regularly and keep it clear for the monitor.
Downtown Silver Spring
Downtown appointments often require building entry details; confirm the unit, desk procedure and permitted visit times.
The Takoma Park and Wheaton edges
At the Takoma Park or Wheaton edges, the street address determines service scope rather than a broad place label.
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.
Book the individual residence, provide its unit number and arrange front-desk or management entry for both visits. Another unit or common area requires separate authorization.
No. Each apartment is a separate dwelling and needs its own authorized scope.
Use the full street address when booking; the technician will test the residence actually selected.
Maintain the required building conditions and leave the monitor exactly 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
