Top Tier Testing
Free on-site estimate
Scheduling
Mold services
Responds in about 1 hour
Thumbtack Guarantee
If you hire this pro, you’re covered by a money-back guarantee. Learn more
If you hire this pro, you’re covered by a money-back guarantee. Learn more
About
With over 15 years of experience, Top Tier Testing is dedicated to providing reliable and professional environmental testing services. We’re passionate about helping homeowners and businesses ensure safe, healthy spaces—especially in the wake of property damages they might be going through.
Our team specializes in a range of environmental services, including soot and ash testing, mold sampling, asbestos assessments and more. Backed by certified professionals and proven protocols, we’re committed to delivering clear, accurate results you can trust.
Services offered
Mold services
Projects and media
8 photos
Projects and media
8 photos
Reviews
Customers rated this pro highly for professionalism, responsiveness, and work quality.
Exceptional 5.0
8 reviews
5
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Read reviews that mention:
Azie N.
1 month ago
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Hired on Thumbtack
Having mold in your house is devastating. Working with Jonathan has been wonderful. He came out immediately and took samples and was very thorough and knowledgeable. He answered all my questions and followed up. Highly recommend him and his company.
Details: Inspection and testing • Mold removal • Owner
Mold Inspection and Removal
Brandon B.
3 weeks ago
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Hired on Thumbtack
Truly incredible! Saw me within 24 hours of checking in on availability and walked me through the whole issue. Incredibly helpful
Details: Inspection and testing • Renter
Mold Inspection and Removal
Erica A.
Jun 28, 2025
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Hired on Thumbtack
Jonathan was very responsive, helpful and worked with my timeline and budget. He continued to provide value and help me understand the nature of my issue and some steps to take even after the service was over, he still made himself available to assist. Highly recommend.
Details: Inspection and testing • Mold removal • Renter
Mold Inspection and Removal
Maria P.
Apr 1, 2025
I recently used Top Tier Testing for mold and soot testing, and I was very impressed with their services. They were professional and very concerned about my well-being.
I highly recommend them for anyone needing reliable air quality testing.
Michele P.
4 weeks ago
•
Hired on Thumbtack
It was a pleasure working with Jonathan. He was very attentive to my questions.
Details: Inspection and testing • No personal impact • Owner
Mold Inspection and Removal
Credentials
Background Check
Jonathan Acosta