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Home/Mold Testing/Bethesda, 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.
Bethesda bookings can involve an established house, a recent rebuild or a condominium. Tell us whether the concern is below grade, near an addition or in shared building space so the appointment addresses the right question.
For a shaded lot, photographs of overflowing gutters may be useful, but canopy alone does not mean there is an indoor mold problem. In an older house, bring details of additions and any basement waterproofing. In a rebuild, construction and drying records can matter more than age. The evaluation should connect what is visible today with the repairs, humidity patterns and water events at your specific address.
01
Shaded walls may dry differently from exposed walls. Overflowing gutters and downspout discharge are useful observations when a concern appears after rainfall.
02
Basement finishes can hide the face of a foundation. Describe prior leaks and waterproofing so a non-invasive evaluation can clearly explain its limitations.
03
A large lower level may remain humid even when the thermostat is satisfied. Discuss persistent humidity with a qualified HVAC professional when the observations point to conditioning.
Where we test in Bethesda, and what to tell us
Edgemoor, Bradley Hills
For a house in Edgemoor or Bradley Hills, identify additions and finishes installed over older materials. A renovation history helps explain what can and cannot be inspected directly.
Glen Echo Heights, Maplewood-Alta Vista
For a Glen Echo Heights or Maplewood-Alta Vista property, describe changes to exterior grading. Rainwater observed at the building is more useful evidence than neighborhood assumptions.
Wildwood and the recent rebuilds
For a rebuild or expanded house, identify HVAC zones and finished lower levels. Ask how moisture was checked before recent walls and floors were closed.
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.
Montgomery County's home-sale rules generally require a radon test for covered single-family sales, with listed exceptions. Ask your agent to confirm the requirement for the particular Bethesda property and whether an existing test qualifies. Mold testing addresses a different question; discuss both services when scheduling if they fit your transaction.
Ask about the assessor's training, relevant experience, laboratory methods and written scope. Independence from remediation is also useful to understand. A Bethesda testing report should identify what was sampled and what the results can support; a certification or laboratory result is not a guarantee about every area of the house.
A rebuilt house can have a specific concern if materials were wetted or a repair concealed dampness. Ask for construction and drying records and point out any stain or odor. Without a defined concern, routine sampling may add little. An evaluation should consider the actual building rather than infer a problem because it was rebuilt.
If the question could affect a purchase decision, discuss access and timing with your agent while contractual options remain available. A later assessment can still help investigate a maintenance concern. Testing provides information within its scope; it does not decide whether to proceed with a Bethesda purchase or replace legal advice about the contract.
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
