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Radon testing

Radon Testing in Ellicott City, 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 Howard County

Schedule a radon test Call (703) 450-6398

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 Ellicott City?

A radon test in Ellicott City 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. One residential test covers one Ellicott City dwelling. Clarify mixed-use buildings, tenants and separate units when booking. For a vacant sale, confirm that normal mechanical operation and required closed conditions can be maintained until the technician returns.

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 Ellicott City.

Radon testing for Ellicott City homes

Ellicott City homes can have different lower-level layouts, so the technician needs the current use of the property rather than its neighborhood label. A Howard County map and an earlier result from another house cannot provide this home's indoor radon level. Describe the lowest room that is or could be used regularly, including a basement bedroom, office or family room a buyer plans to occupy. In a building with more than one dwelling, identify the booked unit.

For an Ellicott City radon appointment, give the full address and an authorized contact for monitor placement and collection. The measurement takes at least 48 hours under closed-house conditions, with the device left in place. If access depends on a tenant, shop operator, agent or lockbox, coordinate both visits before selecting dates. Discuss ongoing work in the lower level and any purchase deadline so the report can be scheduled without disturbing the test.

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

Historic Ellicott City buildings viewed from above

01

Current room use

Test placement follows the present dwelling and usable lower rooms.

02

Exact unit

A mixed-use or divided building may contain separate residences.

03

Two reliable visits

Coordinate entry for placement and pickup.

Where we test in Ellicott City, and what to tell us

  • Historic Main Street area

    If a building has more than one use or dwelling, identify the residence being tested.

  • Lawyers Hill

    Describe any lower room planned for regular occupancy.

  • Upland Ellicott City neighborhoods

    Schedule around moving or renovation activity near the monitor.

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 Ellicott City

Radon testing in Ellicott City, answered straight

Does a historic Ellicott City address change the radon test?

The property's age or historic setting does not establish its indoor radon level. Describe the current dwelling and lower rooms so the technician can place the device appropriately.

Can an upstairs apartment use a shop's or another unit's result?

No. A standard home test covers the booked residence. Identify the apartment and discuss any other unit needing its own result before scheduling.

What should a buyer tell the technician about a basement?

Explain whether the lower room is used or could be used regularly after purchase. That planned use may affect where the monitor belongs.

How should I plan around renovation work?

Choose dates when work will not disturb the device or required closed-house conditions. Discuss ongoing repairs with the testing team before placement.

Book a radon test in Ellicott City

Book online or call (703) 450-6398.

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

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