Home/Radon Testing/Fairfax County/Centreville, VA

Radon testing

Radon Testing in Centreville, 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 Centreville?

A radon test in Centreville 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 residential price covers one Centreville home or unit. Book online or call with the exact address, unit and access contact when the property is attached, rented or managed.

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 Centreville.

Centreville radon testing and Fairfax County risk

Centreville is in Fairfax County, which the EPA places in radon Zone 1. A county map cannot establish the level inside a particular Centreville home. Test the booked residence and identify the lowest room that could be used regularly, including a lower office, bedroom or family room planned after closing.

Fairfax County planning material describes detached homes, townhouses and multifamily housing in the Centreville area. For an attached home or apartment, the result applies to the selected unit, not every dwelling in the building. Provide the full address and unit, and arrange owner, manager or tenant permission for both technician visits where needed.

Local background: Fairfax County Centreville Study, Fairfax County rental program, Virginia Department of Health radon guidance, EPA Map of Radon Zones.

Detached homes and townhouses

Show the technician the booked home's lower rooms rather than assuming a neighbor's layout or result applies.

Rental-unit authorization

Confirm the unit, tenant access and any management approval before placing and collecting the monitor.

Future regular-use space

Mention a lower room planned for work, sleep or recreation even if its present use is storage.

Where we test in Centreville, and what to tell us

Virginia Run, Sully Station
For Virginia Run or Sully Station, prepare the specific residence's lowest potentially regular-use room.
Little Rocky Run, Centre Ridge
In Little Rocky Run or Centre Ridge, identify the correct townhouse or apartment unit and arrange access for both visits.
Singleton's Grove and the later streets
For Singleton's Grove and nearby streets, share the present floor plan and any lower room planned for regular occupancy.

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 Centreville

Nearby

Radon testing in Centreville, answered straight

How should a Centreville tenant arrange access?

Obtain any required owner or management permission, provide the exact unit and make the selected rooms available for both visits. Share building entry instructions when booking.

Can one test cover neighboring townhomes?

No. Each townhouse is a separate residence and can have a different result. The standard scope covers the booked Centreville home only.

Does an unfinished room affect placement?

It can when the room could be used regularly after finishing or even in its current state. Describe its possible use and accessibility; the technician makes the placement decision.

What should a buyer allow in the contract timeline?

Allow for device placement, the full measurement interval, retrieval and reporting. Confirm access early so a missed appointment does not consume the available contingency period.

Book a radon test in Centreville

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

Property inspections

Specialty inspections

Air & environment

Water & materials

Your next step

Our company