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Mold testing
Mold Testing in Fairfax County, VA
Samples taken in your home, analysed by an accredited laboratory. We do not sell remediation, so the report has nothing to sell you.
4.9 rating, over 4,000 reviews NAMRI-certified inspectors Serving all of Fairfax County
Schedule a mold test Call (703) 450-6398 Find your community
Where we test in Fairfax County
Seventeen communities across the county have a page of their own with local detail. The packages, the prices and the laboratory are the same in every one of them, so you can also book straight from here.
Inside and near the Beltway
- Annandale
Ramblers with rear additions on wooded lots, and apartment blocks along Little River Turnpike.
- Falls Church
The Little City's small lots, plus condominiums close to the two Metro stations.
- McLean
Established colonials, teardown rebuilds and finished lower levels on large lots.
- Tysons
High-rise condominiums beside older single-family streets such as Pimmit Hills.
- Vienna
Ranches and split-levels under heavy tree cover, with newer infill toward Tysons.
North county and the Dulles corridor
- Reston
Lakeside clusters, townhouse courts and the towers around the Town Center.
- Herndon
A historic downtown core ringed by planned townhouse and single-family neighborhoods.
- Great Falls
Custom homes on wooded acreage, many of them on private wells and septic systems.
- Oakton
Large wooded lots, converted older structures and townhouse sections along Route 123.
- Chantilly
Planned communities near Dulles, from Franklin Farm to the newer streets by Route 28.
Central county
- Fairfax
The City of Fairfax's older streets and the county neighborhoods that share its mailing address.
- Fair Oaks
Townhouses and condominiums around the mall, with golf-course homes in Penderbrook.
- Centreville
Large planned subdivisions around the historic village, built tight and well insulated.
South county
- Burke
Burke Centre's cluster homes and the lakeside neighborhoods around Lake Braddock.
- Springfield
Block-foundation houses in the original sections and later streets around West Springfield.
- Fairfax Station
Estate lots on well and septic, with stream valleys and detached outbuildings.
- Lorton
New construction around Laurel Hill and Lorton Station, and tidal frontage at Mason Neck.
Falls Church and the City of Fairfax are independent cities inside the county's footprint. The same team, packages and prices cover them.
How much does mold testing cost in Fairfax County?
Four options, depending on how much of the home you need looked at. Not sure which one fits? Start with the thirty minute visit and a technician will tell you what is actually worth testing. Decide to test while they are there and the visit is written up as a Mold Plus.
No sampling
Mold Walk & Talk
"Something feels off and I do not know if testing is worth it."
$175
30 minutes on site
- Time with an environmental technician
- Moisture meter and thermal camera
- Findings explained on the spot
- Each additional 30 minutes $95
- No samples or laboratory work
One area, tested
Mold Basic
"I can see it, or I know exactly where to look."
$345
One targeted area, 1 to 2 hours
- Indoor sample plus outdoor comparison
- Accredited laboratory analysis
- Written laboratory report
- Additional samples $95 each
One area, plus the source
Mold Plus
"There was a leak and I want to know where the water went."
$495
One targeted area, 1 to 2 hours
- Everything in Mold Basic
- Moisture and thermal evaluation of the area
- Read Your Mold Report guide
- Each additional area $50 plus its $95 sample
The whole home
Mold Advanced
"It could be anywhere, or it keeps coming back."
From $550
Priced by home size, 1 to 2 hours
- Whole home moisture and thermal evaluation
- Sampling in the areas that call for it
- Read Your Mold Report guide
- Post-remediation re-test $295 held 3 months
* Prices shown are for Virginia and Maryland. In Washington DC, Mold Basic is $425, Mold Plus is $575, and Mold Advanced starts at $630. Mold Walk & Talk is $175 everywhere.
Where moisture can hide in Fairfax County homes
A mold concern in Fairfax County often starts with a specific room: a finished basement after water entry, a bathroom with recurring condensation, or staining near a plumbing line. When booking, tell us where the concern is, when you first noticed it, and whether the area is still damp. Those details help the office match the visit to the question you want answered.
In a Reston townhouse, a Tysons apartment, or a single-family home near Springfield, access can change what a technician can inspect. Identify the affected unit and floor, any prior leak or cleanup, and whether a wall, ceiling, or crawlspace is inaccessible. The visit can document observed conditions in the agreed scope; a sample from one area cannot certify every hidden surface in the home.
Mold guidance: U.S. EPA on when mold sampling is useful.
01
Basement and lower-level moisture
If the concern is in a Fairfax County basement or split-level room, point out staining, damp flooring, or a musty odor and explain whether it follows rain or a plumbing event. Include any repair or drying history when you book so the technician knows which area needs attention.
02
Bathroom, kitchen, and HVAC concerns
Describe the exact surface or room where condensation, a leak, or visible growth appeared. A consultation may help decide whether sampling would answer a useful question. EPA guidance says sampling is often unnecessary when mold growth is already visible.
03
Townhomes and multi-unit buildings
For a Tysons, Reston, or Lorton unit, provide the unit number and describe any shared-wall or ceiling concern. Confirm access to the affected room. Neighboring units and concealed spaces are outside the visit unless their access and scope are arranged separately.
We only perform testing, not remediation.
We do not remove mold, so we have nothing to gain from your results. If your report shows a problem, you choose who fixes it. Once the work is done, we can test again and tell you what we find.
Before you book in Virginia
Virginia's residential disclosure statement advises buyers to exercise due diligence, including considering a mold assessment conducted by a business following EPA guidance. Confirm the scope and timing with your agent before settlement. A laboratory sample documents a selected place and time; it does not certify an entire home as mold-free or replace advice about your transaction.
Va. Code section 55.1-703. Current as of September 2026. General information, not legal advice.
Mold testing near Fairfax County
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Mold testing in Fairfax County, answered straight
Do you cover every part of Fairfax County?
Yes. The same team books across the whole county, from the streets inside the Beltway to Lorton, Great Falls and Centreville, and the packages and prices above apply everywhere in it. The community pages listed on this page add local detail; you can book from any of them or from here.
Can you assess a damp wall in a Fairfax County condo or townhouse?
Yes, within the accessible unit and the scope you book. Tell us which room or wall is affected, whether a leak is known, and who can provide access. A neighboring unit, shared cavity, or concealed surface is not automatically included; arrange any additional access before the visit.
What information helps you plan mold testing in Fairfax County?
Tell us the affected room, visible conditions or odor, the date and cause of any known water event, and whether repairs or drying have already occurred. We can discuss whether a consultation, targeted visit, or wider moisture evaluation fits the question. Sampling is not automatically needed for visible mold and does not establish that every room is mold-free.
How soon can you get to a house in Fairfax County?
Check the scheduling page for available appointments. If you have a contract deadline, include it in the booking notes and confirm the appointment and expected laboratory turnaround with the office before relying on them. A requested deadline does not guarantee when laboratory results will be available.
Book a mold test in Fairfax County
Real availability on the next screen. No call back required.
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NextDay Inspect
46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398