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Radon testing

Radon Testing in Frederick, MD

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 Frederick County

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What our customers say

From our customer reviews.

They conducted the test right away and kept me informed every step of the way.

Rachel RaphaelRadon testing
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They arrived the day after I called, on time, set up the Radon test and left within 5 minutes.

Catherine HRadon testing
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Everything was handled so professionally, quickly and so easy to have our house tested for radon.

Alma PrinceRadon testing
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They found elevated radon in the home and numerous issues on the home inspection report which were remedied before I moved in.

Shawn McCallRadon testing
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Great service, very thorough inspection and highlighted items in a very approachable and organized manner.

Elizabeth Anne NewberryCustomer review
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How much does radon testing cost in Frederick?

A radon test in Frederick 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. Residential pricing covers one Frederick home or unit. State whether a row house, apartment or divided property contains separate dwellings. If a property has an English basement apartment or rear unit, state which dwelling needs the report and who can authorize entry.

Day 1

Drop-off

We place the monitor

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

The monitor does the work

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

We collect it, read it, and write it up

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.

National Radon Safety Board

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 Frederick.

Radon testing for Frederick homes and apartments

A Frederick City radon result has to come from the residence in question. A Frederick County map or a neighboring house cannot establish its indoor level. Tell the technician whether the booking is for a house, townhouse or apartment and describe the lowest room that is or could be used regularly. An older building with multiple dwellings needs the specific unit identified; a buyer's planned basement use can also affect placement.

For a Frederick appointment, provide the full address, unit number if applicable, and an authorized contact for monitor placement and collection after at least 48 hours. Occupants should follow closed-house instructions and leave the device alone. If access depends on a tenant, front desk or agent, coordinate both visits before choosing dates. Schedule around lower-level work and allow time for the written report before a contract deadline.

Radon testing guidance: Maryland Department of Health radon guidance, EPA radon-zone map guidance, EPA guide for home buyers and sellers.

Snow-covered rooftops in Frederick, Maryland

01

Frederick City dwelling

Test the house or private apartment that needs the result.

02

Lower-room plans

Describe a basement office, bedroom or family area.

03

Multi-unit access

Provide the exact unit and authorized entry contact.

Where we test in Frederick, and what to tell us

  • Market and Patrick Street area

    In a divided or mixed-use building, identify the residence and entrance.

  • Carroll Creek and Baker Park edges

    Explain current and planned lower-room use.

  • Frederick residential neighborhoods

    Coordinate occupants and both visits before placement.

We only perform testing, not mitigation.

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.

Before you book in Maryland

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.

Radon testing near Frederick

Radon testing in Frederick, answered straight

Can a Frederick County map show my city home's level?

No. The map cannot determine the indoor level at one address. Test the particular Frederick residence for its own result.

Can an apartment use a reading from another floor?

A neighboring unit's result does not measure yours. Provide the exact building and unit and arrange access to that private residence.

Which basement room matters to a buyer?

Tell the technician about the lowest space suitable for regular use, including a room the buyer plans to finish or occupy.

How much time should I allow for a purchase test?

Allow for placement, at least 48 hours of measurement, collection and the written report. Share the contract deadline before booking.

Book a radon test in Frederick

Book online or call (703) 450-6398.

Schedule a radon test Request a price

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46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398

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