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Radon testing

Radon Testing in Lorton, VA

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 Fairfax 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.

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

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

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

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

How much does radon testing cost in Lorton?

A radon test in Lorton 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. A regular Lorton appointment includes one residence. A detached accessory dwelling, separately leased lower area or neighboring unit must be discussed as another scope before testing begins.

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.

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 Lorton.

Radon testing for Lorton homes

Lorton is in Fairfax County, an EPA Zone 1 area. Fairfax County also reports that elevated radon can occur throughout the county and that nearby homes can have different results. A Lorton home's own test is the useful evidence. Tell the technician how the lowest level is used now and whether a lower office, bedroom or family room will be used after a purchase or renovation.

A professional short-term radon test takes at least 48 hours and requires monitor placement and collection. Give us the exact Lorton address, a person who can provide access on both visits, and any lockbox, alarm or pet details. Plan a period when occupants can follow closed-house instructions. If movers or contractors are scheduled, tell us beforehand so the monitor can remain in a suitable, undisturbed location.

Radon testing guidance: Fairfax County Health Department radon guidance, Virginia Department of Health radon map resource, EPA purpose of the Map of Radon Zones.

A residential street of detached houses in autumn

Fairfax County risk

A Zone 1 label makes testing sensible, but only a test tells you about this home.

Lowest usable level

Include a lower room intended for regular use even if it is not occupied yet.

Access and timing

Arrange placement, at least 48 hours of testing, and a return visit for pickup.

Where we test in Lorton, and what to tell us

Laurel Hill
For Laurel Hill, describe any lower room planned as an office, bedroom or family area.
Lorton Station, Crosspointe
For Lorton Station or Crosspointe, give the specific house or townhouse and access contact.
Mason Neck, Gunston Cove
For Mason Neck or Gunston Cove, share reliable arrival and return-visit directions.

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 Virginia

Virginia's residential disclosure statute directs the seller's disclosure statement to say that the owner makes no representation about whether the property is in an EPA Zone 1 or Zone 2 locality. It directs buyers to use due diligence, including reviewing EPA, Virginia Department of Health and NRSB information and ordering a radon inspection before settlement as the contract allows.

Va. Code section 55.1-703. Current as of September 2026. General information, not legal advice.

Radon testing near Lorton

Nearby

Radon testing in Lorton, answered straight

What does the county source say about Lorton Station?

The Lower Potomac plan amended through March 21, 2023 calls Lorton Station a residential subdivision on page 70. It does not describe every Lorton property or indicate a radon reading.

How should a Laurel Hill seller protect the test area?

Keep contractors and moving activity out of the selected lower room, maintain the instructed building conditions and tell household members where the device is located. Leave it untouched until pickup.

What access information helps at a Mason Neck address?

Provide private-road directions, gate instructions, lockbox details, animal cautions and a contact who can answer locally. Confirm those arrangements for both the placement and collection visits.

How should a Lorton buyer plan around settlement?

Schedule early enough to complete setup, no less than 48 hours of monitoring, retrieval and report delivery before the contingency decision. Tell the office both settlement and contingency dates.

Book a radon test in Lorton

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

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