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Mold testing
Mold Testing in Loudoun 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 Loudoun County
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What our customers say
From our customer reviews.
These guys were very professional. Showed up on time and completed a mold inspection on schedule.
I hired Next Day Inspect to do a mold inspection on two houses. Scheduling was easy.
I got the results of my mold inspection in a reasonable timeframe. No issues.
Polite, knowledgeable, friendly Quick results for just an air mold test
Booking service was easy. The technician was friendly and efficient. Recommend for mold testing.
Where we test in Loudoun County
Seven 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.
Eastern Loudoun and the Dulles corridor
- Sterling
Sterling's older subdivisions sit closest to the Potomac, with newer sections spreading toward the airport and the office parks.
- Ashburn
Ashburn pairs decades-old subdivisions with recent construction still settling into its lots along the technology corridor.
- South Riding
South Riding's single master plan still produced several distinct lot types spread across one homeowners association.
- Brambleton
Brambleton's phased construction means a villa, a townhome and a rowhouse can sit within sight of each other.
Leesburg and the Potomac
Western Loudoun toward the Blue Ridge
- Purcellville
Purcellville's rebuilt Main Street sits close to farmhouses and newer subdivisions reaching toward the Blue Ridge foothills.
Leesburg and Purcellville are incorporated towns inside the county, not independent cities, so the same team, packages and prices reach them.
How much does mold testing cost in Loudoun 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 Loudoun County homes
Whether the property is a Sterling townhouse, a Leesburg single-family home, or a western Loudoun farmhouse, start with the room and the moisture history. Tell us about a known leak, recurring dampness, visible growth, or a musty odor, and when it began. The street address establishes service coverage; the conditions inside the home determine what the visit needs to examine.
Before a mold visit in Loudoun County, identify the affected floor and any prior drying, repairs, or sampling. If the concern involves a finished basement, an addition, or a separate building, mention that when booking. We can help select a consultation or testing package for the accessible area and explain what a chosen sample can and cannot answer.
Mold guidance: U.S. EPA on when mold sampling is useful.
01
Finished basements and lower levels
For a damp room near Leesburg, Ashburn, or Sterling, describe any water entry, wet materials, staining, or odor and whether it appears after rain. The technician can focus on the reported area and its moisture history within the selected package.
02
Leaks near plumbing or HVAC equipment
If a bathroom, laundry room, or mechanical area has a known leak, describe where water went and what was dried or replaced. This is more useful for planning a mold visit than a county soil map; sampling should answer a specific question rather than serve as a routine baseline.
03
Additions and separate buildings
For a western Loudoun property, say whether the concern is in the main house, an addition, or an outbuilding. Provide access details and any known leak history. A standard home appointment does not automatically include every separate structure.
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 Loudoun County
Nearby
Mold testing in Loudoun County, answered straight
Do you cover every part of Loudoun County, from Sterling to Purcellville?
Yes. The same team and pricing serve the full county, from the Dulles corridor towns in the east to Purcellville and the Blue Ridge foothills in the west. The community pages linked here add local detail, and any of them can start a booking for the same visit.
Does a Loudoun County mold visit include an addition or detached building?
Tell us about the addition or separate building when scheduling so the office can confirm the visit scope and access. Describe the affected room, any known water event, and work already done. A package for the main home does not automatically include every outbuilding or inaccessible space.
How do I choose a mold visit for a Loudoun County home?
Describe the exact room, any visible growth or musty odor, and the history of leaks, repairs, and drying. The office can explain the scope of a consultation, targeted package, or whole-home moisture evaluation. EPA says sampling is often unnecessary when mold is already visible; a sample is useful only when it helps answer a defined question.
Do I need to do anything special before a visit to a well-and-septic property in western Loudoun?
Tell the office which room concerns you, whether the property uses private utilities, and whether access is limited. Follow the preparation instructions for the package you select. Do not open an unsafe crawlspace or assume well and septic evaluation is included with mold testing.
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NextDay Inspect
46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398