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Home/Mold Testing/Gaithersburg, MD
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 Montgomery 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
"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.
For a Gaithersburg appointment, identify whether the property is in Kentlands, Lakelands, Olde Towne or another nearby neighborhood. Attached construction, porch connections and lower-level rooms each raise different questions when a stain or odor appears.
A decorative porch does not create mold by itself. If staining appears where its roof meets a wall, the history of rainfall and repairs can help focus a moisture evaluation. In an attached home, shared-wall access may also matter. Bring photographs of the affected area and details of recent window or siding work. The visit follows the particular building rather than assuming a construction style has a predictable defect.
01
Porch roofs and trim meet exterior walls at several junctions. Staining at one of those junctions warrants investigation but does not establish the cause on appearance alone.
02
A narrow side yard can limit where runoff is directed. Observe downspout discharge during rain and note whether dampness inside follows the same pattern.
03
Original and replacement components can perform differently on the same house. Dates, condition and repair history help focus the evaluation more reliably than neighborhood age.
Where we test in Gaithersburg, and what to tell us
Kentlands, Lakelands
For a Kentlands or Lakelands townhouse, identify the room affected and any shared exterior maintenance. Porch and roof connections can be considered when the evidence points there.
Washingtonian Woods, Quince Orchard Park
For a Washingtonian Woods or Quince Orchard Park home, bring replacement-window and siding records. Components should be evaluated by condition, not presumed service life.
Olde Towne Gaithersburg
For an Olde Towne property, identify older materials and later alterations. A non-invasive scope can respect existing finishes while documenting areas needing further access.
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.
For a Maryland property, define the question before ordering samples: a particular stain, persistent odor, water event or follow-up after repairs. Keep dated observations and laboratory findings with the repair history. A report does not determine health risks, insurance coverage or legal responsibility. Montgomery County also publishes separate radon requirements for covered home sales; confirm which rules apply to your transaction.
EPA sampling guidance; Montgomery County radon guidance. Current as of September 2026. General information, not legal advice.
Yes. For a Kentlands townhouse or attached property, identify the affected room and any shared-wall or exterior-maintenance issue. The sample plan depends on that concern and accessible areas. A report on one unit should not be treated as an assessment of adjoining homes or proof of responsibility for a shared repair.
The Maryland prices above apply to Gaithersburg. Choose between consultation, targeted testing, targeted testing with moisture and thermal evaluation, and Advanced testing priced by home type and size. Explain your concern if you are unsure. The total may change with agreed additional samples or areas, so confirm the scope before work begins.
That junction is a reasonable place to investigate, but the stain alone does not prove a flashing failure or mold. Describe whether it changes after rain and provide repair photographs. Mold Plus may fit a defined area needing moisture and limited thermal evaluation; concealed damage can require a separate opening or contractor investigation.
Ask your agent or attorney about disclosure obligations for the particular sale. A report creates a dated record of its findings and limitations; it does not determine what must be disclosed or guarantee a negotiation outcome. If there is a known leak or visible concern, address it through the appropriate professionals rather than rely on avoiding information.
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
