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Top-Rated Mold & toxic material testers in Leesburg - Updated Nov 2026

Avatar for MoldGone LLC
MoldGone LLC
4.8(
1,006
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Jay was great. Went through our garage, solved our issue, didn't try to upsell us, just a very thorough professional estimate and analysis of a mold-related smell issue."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

Response time1 day
9 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for The Best Air Quality and Restoration
The Best Air Quality and Restoration
4.8(
236
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Very professional, courteous, knowledgeable and helpful. They did a good job cleaning my air ducts and treating them for mold. They worked diligently for 1-1/2 hours. I thought the price was very reasonable. I would hire them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+50

Response time10 hrs
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for ZeroMold
ZeroMold
4.9(
41
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Zeromold was very helpful. I had mold in my basement bathroom. I didn't know how long it had been there or if it was also somewhere else I couldn't see. They tested for mold and cleaned it all up. Very effective. Thanks."
Fogging Process
Commercial Fogging
Fogging Process
Before and After Mold Spore Count
Inspection

+5

Response time6 hrs
Response rate98%
20 neighbors recently requested a quote
Avatar for Mid-Atlantic Mold and Restoration
Mid-Atlantic Mold and Restoration
4.8(
19
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"Excellent. Bruce is extremely honest and professional. I called Bruce after an exterminator warned me that he saw mold in my basement. Bruce came the next day, arrived exactly on time and upon visual inspection, told me that I did not have a mold issue. He could have easily set up treatment and I would have paid as I was afraid for the health of my family but Bruce is about as honest as they come. Jason"
Recommended by100%of homeowners
Avatar for Applied Remediation Solutions
Applied Remediation Solutions
4.9(
67
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"I had an excellent experience with this mold remediation company. Bob truly went above and beyond my expectations. He was not only extremely professional and knowledgeable but also very personable, which made the entire process much more comfortable. What really stood out was his attention to detail. After completing the remediation, he even took the time to clean up my basement area, leaving it better than he found it. That level of care and dedication is hard to come by. I highly recommend this company to anyone in need of mold remediation services. You can trust that you’ll be in great hands!"
Hoarding
Hoarding
Hoarding
Crawlspace
Crawlspace

+15

Response time3 hrs
Response rate100%
Recommended by76%of homeowners
Avatar for Mold Test Company VA
Mold Test Company VA
4.0(
119
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"The mold that was found was cladosporium. I had alerted the company that I have over 100 plants in my home and it is a small home. Aside from Humidity being mentioned- which humidity is high, Nothing was mentioned that this type of mold is common to be found on and in plant matter and soil and aside from getting the growth on the wall that was found treated- the plants in my home would be the cause therefore treatment alone would likely not solve the issue. I had to get this information from another contact. The testing itself and the results were completed in a timely fashion, and I would very much likely use them again to inspect my home- because they were able to identify and tell me what the mold was even if unable or unwilling to make the connection to the setup of my home :)"
Technician
PVC Pipe
Shoes
Shoes
Shoes

+77

Response time1 day
195 neighbors recently requested a quote
Recommended by82%of homeowners
RDV Environmental Services
4.8(
118
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"Richard was prompt, did good work, and installed a system that I have since confirmed has fixed not our issue (new tests have confirmed this). Additionally - the system is always on but is so quiet and installed so well (and run through parts of the house that are very low traffic) you wouldn’t even know it was there unless you were probably a professional contractor who knew to ask or look."
Response time1 day
15 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Mold Test Company MD-DC
Mold Test Company MD-DC
4.0(
33
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2015

Emergency services offered

Small jobs welcome

"This company performed a very thorough mold analysis. They opened my eyes to the dangers of the various types of mold growing in my house and provided possible solutions to remediate it."
Mold Testing
Mold Testing
Mold Testing
Mold Testing
Mold Testing

+70

Response time1 day
182 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Water & Mold Remediators
Water & Mold Remediators
4.8(
10
)
Mold & Toxic Material Test

Serving Leesburg, VA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Water & Mold Remediators completed two projects of mold remediation in our home. Carlos gave us a very reasonable estimate. He was excellent to work with, very professional. He frequently checked on how the projects were going to make sure that everything was done to our satisfaction. He did an excellent job of communication. The workers were always punctual and also cleaned up the area very well. I would recommend his company to anyone with mold issues."
Storm Approaching
Water damage / Outside black water
Water damage / Outside black water
Water damage / Outside black water
Water damage / Outside black water

+50

Response time1 day
Recommended by100%of homeowners
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FAQs for mold & toxic material test projects in Leesburg, VA

Some companies offer a no‑cost phone or video consultation that screens for red flags. If the discussion points to a real issue, the pro will recommend a paid on‑site inspection. The complimentary call clarifies whether you need full testing, but it isn’t a substitute for samples, lab work, or a written report. Always confirm what the free service covers before you schedule.

A standard inspection, which includes basic air and surface samples, takes an average of two hours. If the pro needs to probe hidden spaces, such as wall cavities or ductwork, plan on up to six hours. Extra time allows the inspector to reach tight areas, collect additional samples, and document findings. Lab analysis is a separate process and often adds several business days to the overall timeframe before you receive the full report.

Mold thrives where moisture lingers and air flow is poor. Common hotspots include bathroom walls, kitchen backsplashes, window sills, HVAC vents, fireplaces, crawl spaces, and enclosed attics. Check these areas regularly—especially after leaks or high‑humidity weather—to catch growth early and avoid costly repairs.

Unchecked mold can knock 20% to 37% off a home’s market value because buyers worry about hidden damage and health risks. Even after remediation, visible staining or a history of major moisture issues can still lower offers and prolong the time on the market. Addressing mold quickly protects both your property’s structural integrity and its resale appeal.

The Leesburg, VA homeowners’ guide to mold & toxic material tests

From average costs to expert advice, get all the answers you need to get your job done.