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Home/Mold Testing/Catonsville, 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 Baltimore 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.
Catonsville grew along a turnpike rather than a rail junction. The Maryland Historical Trust's register listing for the old historic core describes a shift from summer residences to year-round suburban living between 1866 and 1950, laid out along Frederick Road, the old Baltimore to Frederick turnpike. A separate Trust listing for the Winters Lane Historic District records a distinct African American community that grew from an 1867 school into the residence of most of Catonsville's Black families by 1910. The two grew close together but not the same way.
For a home along Frederick Road in the historic core, describe the architectural style and any addition, since a Queen Anne cottage and a Craftsman bungalow built decades apart can share a block. Near Winters Lane, tell us about lot width, foundation type, and any room added onto a narrow original footprint. Elsewhere in Catonsville's newer subdivisions, identify the house's approximate age and whether a basement was finished after the original construction. This page serves Catonsville in Baltimore County, not Howard County, and package pricing follows our Maryland schedule.
Local background: Maryland Historical Trust: Old Catonsville Historic District, Maryland Historical Trust: Winters Lane Historic District.
01
A Frederick Road block can mix a Victorian-era house with a bungalow built decades later, each with different framing and roof details. Describe the specific house's age and any addition, since a neighboring building's construction says little about your own.
02
On Winters Lane's narrow lots, houses sit close enough that a neighboring foundation or roofline can be relevant to an assessment. Describe any addition built onto the original footprint and whether the affected room is part of that addition or the original house.
03
A newer Catonsville house built on a slab has different moisture questions than one with a crawlspace or basement. Describe the foundation type, any finished lower level, and whether a bathroom or laundry area sits near an exterior wall.
Where we test in Catonsville, and what to tell us
Frederick Road and Catonsville's historic core
Identify the architectural style and approximate age of the house, since Queen Anne, bungalow and Colonial Revival homes from different decades sit on the same block. Note any addition or porch enclosure and how it connects to the original structure.
Winters Lane
Describe the lot width, foundation type, and any room added onto the original footprint, since homes here were built close together on narrow lots. A later addition's construction often differs from the original house's.
Catonsville's newer subdivisions
For a house built well after the historic core, identify its approximate age and whether a basement or lower level was finished after the original construction. A recent renovation record helps more than the surrounding area's general age.
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.
Mold Basic addresses one targeted area, useful for a single documented concern such as a cellar or a specific wall. Mold Plus adds a moisture and thermal evaluation of that same area. Advanced covers a whole-home scope. Describe the house's age, any renovation history, and where the concern appears, and the office can help match the visit.
No. Catonsville is in Baltimore County, and this page and its package pricing follow our Maryland schedule regardless of how an online listing labels the county. Describe your street address when booking so the office can confirm coverage. The technician assesses the accessible property the same way regardless of which county a directory happens to list.
Often, yes. Air sampling uses a pump, and a surface sample can be taken from an accessible area without opening walls. Describe any original plaster, trim or flooring you want handled carefully, and mention past additions or repairs. The technician can explain what a non-invasive visit can address and what would need a separate, more invasive investigation.
Not necessarily. A newer house typically has fewer additions to account for, so the visit can often focus on the single room in question. Describe the foundation type, the home's approximate age, and any finished basement or renovation. The office can help decide whether a targeted area or a broader evaluation fits what you have observed.
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
