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Home/Mold Testing/Manassas, VA
Mold testing
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 City of Manassas
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
"Something feels off and I do not know if testing is worth it."
$175
30 minutes on site
One area, tested
"I can see it, or I know exactly where to look."
$345
One targeted area, 1 to 2 hours
One area, plus the source
"There was a leak and I want to know where the water went."
$495
One targeted area, 1 to 2 hours
The whole home
"It could be anywhere, or it keeps coming back."
From $550
Priced by home size, 1 to 2 hours
* Prices shown are for Virginia and Maryland. In Washington DC, Mold Basic is $425, Mold Plus is $575, and Mold Advanced starts at $630, with $80 added to every home-size tier. Mold Walk & Talk is $175 everywhere.
Manassas began as a railroad junction. Virginia's Department of Historic Resources records that the Orange and Alexandria Railroad's link with the Manassas Gap Railroad drew settlers through the 1850s, and that the town incorporated in 1873. The same record notes that growth accelerated once the county seat arrived from Brentsville in 1892, filling the district with houses built for officials and railroad workers. That century-old core now sits beside later suburban additions, so a damp room here can trace back to very different original framing.
For an Old Town house, describe the cellar or crawlspace access and any addition built onto the original frame. In Bristoe Station, tell us whether the concern involves a slab, a crawlspace or a finished basement, since builders here used more than one foundation type. In Wellington, Sudley or Westgate, note whether the home has been updated since it was built and where a previous owner may have altered drainage near the foundation. A recent roof or gutter repair is useful information even if the affected room sits on the opposite side of the house.
Local background: Virginia DHR: Manassas Historic District.
01
Many houses near the historic core were built for officials and railroad employees around the turn of the century, according to the Virginia Department of Historic Resources. Record whether an addition, converted porch or updated foundation coating sits between the original framing and the room where a stain appears.
02
An addition built onto an older house can meet the original wall at an uneven seam. Describe where the two sections join, whether the roofline changes at that point, and whether staining follows that seam rather than spreading across a single wall.
03
Subdivisions built at different times use different foundations, so a slab, a crawlspace and a basement can sit within a few blocks of each other. Identify which type applies to your house before the visit, and note any prior water entry specific to that foundation.
Where we test in Manassas, and what to tell us
Old Town Manassas
In the historic core, identify the cellar or crawlspace beneath the original structure and any addition built at the rear. Note masonry condition and whether interior finishes were added during a later renovation, since that changes what a visit can access directly.
Bristoe Station
For a townhome or single-family house here, tell us the foundation type and whether the concern sits near a shared wall or an attached garage. Nearby parks and trails are not relevant to a visit, but recent grading or drainage work at the house is.
Wellington, Sudley and Westgate
These established neighborhoods mix ranch, split-level and colonial-style houses. Identify which applies to your address, describe any crawlspace or partial basement, and note whether shopping-center runoff or a neighbor's grading change affects water flow toward your foundation.
No version of your result is worth more to us than another one. If the report says you need work, you choose the remediator. A separate post-remediation assessment can document conditions after the work within its agreed scope.
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.
Describe the room, when the odor started and whether any repair preceded it. A Walk & Talk consultation reviews the space without laboratory samples. Mold Basic targets that one area with sampling, and Mold Plus also brings a moisture and thermal evaluation of that same targeted area. The office can help match the scope to what you describe.
Tell us if the house was built close to the original railroad corridor and whether it has masonry or frame construction. Older material near active rail lines is not automatically a concern by itself. Describe any vibration-related cracking or drainage change you have noticed, and the visit can be scoped to that observation.
Yes. Describe when the addition was built relative to the original structure and whether the roofline or siding changes at the seam. The technician can note that boundary and record observations separately for the original section and the addition, rather than treating the house as a single uniform structure.
Tell us whether your unit is attached on one or both sides and where the concern is located relative to that wall. A shared wall may involve a neighboring unit's space, which needs separate access. The visit can address your accessible property while noting where the boundary limits what can be confirmed.
Real availability on the next screen. No call back required.
Schedule a mold test Request a price
NextDay Inspect
46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398
