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Home/Radon Testing/Prince William County/Manassas, VA
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 City of Manassas
A radon test in Manassas 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 Manassas City dwelling is covered; clarify units and agent access. In a sale, specify who receives the report and confirm that the independent City address appears correctly on the booking. Record any test interruption.
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 Manassas.
Manassas is an independent Virginia city, separate from Prince William County, so the county's numerical radon zone should not be assigned to a City residence. State health guidance calls for each home to be tested. The measurement made inside the selected Manassas dwelling provides the address-specific result.
City history records an 1873 charter and growth after the county seat moved in 1894. These civic dates do not date every home. Use the complete address to confirm whether a Manassas mailing address is inside the independent city or in Prince William County. For Old Town, Bristoe Station, Wellington, Sudley and Westgate appointments, identify the current floor plan and governing jurisdiction. An Old Town residence above commercial space should be booked as the specific dwelling, with its door, floor and keyholder identified. At Bristoe Station, attached neighbors remain separate homes and one result cannot extend across a shared wall. In Wellington, Sudley or Westgate, walk through current and planned use of the lowest rooms before the technician chooses a location. A seller should arrange agent or occupant access for placement and retrieval and keep remodeling outside the test period. If a window is opened or equipment is moved, document the event and tell the technician. The report belongs to the tested residence and should be interpreted for that address, without substituting another jurisdiction's history or a nearby household's reading.
Local background: Virginia Department of Health radon guidance, EPA Map of Radon Zones.
01
Use Manassas City information rather than Prince William County assumptions.
02
Provide the correct residential entrance and floor.
03
A neighbor’s reading does not represent the booked unit.
Where we test in Manassas, and what to tell us
Old Town Manassas
In Old Town, schedule around tenants, businesses and restoration work.
Bristoe Station
At Bristoe Station, identify the individual attached residence.
Wellington, Sudley and Westgate
In Wellington, Sudley or Westgate, mention future use of low rooms.
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.
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.
Manassas is an independent city rather than part of Prince William County. The complete address keeps the appointment tied to the correct locality while the indoor test answers the question for that residence.
No. Each residence requires its own measurement.
Pause disruptive work until after collection.
Allow time for both visits, the measurement interval and reporting.
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
