Customers consistently praise the company for thorough mold inspections, punctual appointments, and detailed reporting on air quality issues. Reviewers highlight clear communication, knowledgeable staff, and efficient scheduling as key aspects of the service. However, a small number of low-star reviews criticize the pre-inspection communication for being vague and lacking direct phone contact, despite the overall high satisfaction with the final testing results.
Google rating: 5.0 out of 5 from 327 reviews (98% five-star).
Reviews on this page: 327 Google reviews (307 with written comments, 1 with photos).
Owner responses: the business replied to 79% of reviews.
Most recent review: October 16, 2026.
Service: Mold Inspector serving Tigard, Oregon.
Data from Google, last updated October 26, 2026.
Photos
Customer reviews
5.0
★★★★★
327 reviews on Google
5★322
4★2
3★0
2★0
1★3
Reviews from Google, shown as published (original wording, unedited).
FO
Francisco Ortiz7 reviews
★★★★★
Had a fantastic experience with this company. Garret is very knowledgeable. He promptly answered all my questions and concerns. His testing and sample collection was extremely thorough and punctual. I was very impressed with the reports provided. Absolutely recommended for anyone that wants to know for sure the mold status on the house. I would not hesitate to use again and recommend to friends and family. Worth every penny!
Price assessment: Reasonable price
Services: Environmental due diligence
Response from the owner · a week ago
Francisco, thank you for the glowing review. We’re delighted Garret’s knowledge, punctual testing, and clear answers gave you confidence in your home’s mold status. Your recommendation means a great deal, and we look forward to assisting you or anyone you refer in the future.
Worked with Garrett on having my living area and crawl space tested for mold. Garrett was punctual and help explain the sampling and testing process. He was available to answer follow up phone calls to review test results.
Response from the owner · a week ago
Margaret, thanks for the kind review. We’re glad Garrett was punctual, explained the sampling and testing clearly, and remained available to review results with you. Hearing this reassures our team that timely communication matters. We appreciate your trust and are here if you need anything in the future.
Jonah, thank you for the great review. We’re pleased to hear our responsiveness and efficiency stood out, and we truly appreciate your recommendation. It means a lot to our team. We look forward to assisting you again.
Great experience from very first contact to receiving the final results. Garrett was phenomenal at communication, attention to detail, and incredibly skilled in mold detection and analysis. The whole process was painless and efficient. Highly recommend!
Price assessment: Reasonable price
Services: Environmental due diligence
Response from the owner · 2 weeks ago
We really appreciate you sharing this, K M. We're thrilled Garrett's clear communication, meticulous eye, and quick turnaround made the process smooth and painless. Hearing the final results met your expectations means a lot. We look forward to assisting you again whenever needed.
I had a great experience with MTSO Mold Testing, and I especially want to recognize Garrett Dayfield, who was our technician.
Garrett was respectful, friendly, and very thorough. He took his time with the inspection and talked me through what he was seeing, which I really appreciated. He was straightforward and transparent throughout the process, and I always felt like I was getting an honest assessment and clear information.
He was also very prompt, and we received our report and results quickly. The recommendations for contractors and next steps were really helpful and gave us a good place to start.
Overall, I really appreciated how easy Garrett made the process. Mold can be a stressful thing to deal with, and I felt like we were in good hands. I would definitely recommend MTSO Mold Testing.
Response from the owner · 3 weeks ago
Thank you, Daniel. We’re so glad Garrett’s respectful, thorough approach and clear explanations helped make the process easier and that the report and recommendations were useful. Your recommendation truly encourages our team. We’re here if you need further assistance.
Garrett Dayfield of Mold Testing Services of Oregon, LLC did an excellent job of assessing my house, inside and out, with ample pictures, thorough descriptions, and suggestions for addressing problems with mold and other air quality issues. Use this service earlier rather than later. Mold is dangerous!
Price assessment: Reasonable price
Services: Environmental due diligence
Response from the owner · 4 weeks ago
Thank you, Leslie. We’re glad Garrett’s thorough assessment, clear photos, and practical suggestions were helpful. Your reminder to act early on mold is important. We appreciate your trust and are here if you need further assistance.
Garrett with Mold Testing Services was very helpful, fast and efficient after we had a water
leak vehind the wall that turned out to be moldy. I wiah everyone was as clear and professional as he is!
Services: Environmental due diligence
Response from the owner · 4 months ago
Thank you for the 5-star rating, Robert — we really appreciate it. We're delighted you had a great experience and look forward to serving you again. If you ever need anything, feel free to reach out.
Garret was very professional and supplied a very detailed report that is helping us know how to move forward with needed fixes.
Response from the owner · a month ago
Thanks for sharing, Carrie. We appreciate hearing that Garret's professionalism and thorough report are helping you determine next steps. Your kind words motivate our team. We look forward to supporting you if you need anything else.
Garrett did a wonderful job on his visit. Incredibly thorough and professional. He explained each step of the process and spent the time answering all our questions. Just a very positive experience all around. Would completely recommend his service to others!
Response from the owner · a month ago
Robert, thank you for the wonderful feedback. We are thrilled Garrett was thorough, professional, and took the time to explain everything. Your recommendation means a great deal to our team. We look forward to helping again if you need us.
The owner Garrett was very thorough in his evaluation of our home for mold. He was very knowledgeable and gave us good recommendations on what to do to address issues in our home. I would definitely recommend his services.
Response from the owner · a month ago
Thank you, Christopher. We are glad Garrett’s thorough evaluation and clear recommendations helped you address the issues in your home. We appreciate your recommendation and your trust in our services. Please reach out if we can assist further.
