4.6 
35 *The Angi rating for Mold Testing And Remediation companies in Weldon Spring, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Mold Testing And Remediation needs.
*The HomeAdvisor rating for Mold Testing And Remediation companies in Weldon Spring, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Mold Testing And Remediation needs.
Last update on February 10, 2026
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2017
Emergency services offered
Small jobs welcome
"Steve was very prompt and courteous. He was also very knowledgeable. I would recommend him to anyone that has a mold problem,"
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2022
Free estimates
Warranties offered
"Mold One found the problem that was causing my son to wake up congested! Mold One was great to work with!"
+4
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2008
Emergency services offered
Small jobs welcome
"My review is tiered because the overall service seems to run on tiers. The technician was great. Very personable and professional. 5 stars for his work. Your tests get sent to the lab. The lab explains the results and recommends a company for a DIY solution. This is where things start to fall apart. The company you get referred to has abysmal reviews and the sales pitch feels extremely predatory. That taints my opinion of the lab results which would be teamed up with a business they probably shouldn't recommend. We're planning on either an independent company locally to get a quote from for any remediations we will take or even see what home depot has to offer. In any event please read the reviews of BioCide, the company they will recommend you use. We're still not sure we even have a real problem if they are working together."
+78
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2008
Emergency services offered
Small jobs welcome
"Mr Henry Smith was on time, very professional at what he does he not only expained to me what was going on he made sure he answered all of my questions and concerns talking to him about my experience in my home he understood me he was able too show me areas around the outside of my home and pin point the possibility of how and,where the problems occurred I learned a lot mist of all always have my home tested before moving in this would savee and my love ones alot of health issues pain and suffering in the future I would highly recommend the mold testing company to any and everyone who needs assistance with mold it is so worth it thanks Mr Henry Smith and the molding company"
+70
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"They got in, got out and provided detailed results. Answered questions and very knowledgeable. Would definitely use again and highly recommend."
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2001
Free estimates
Warranties offered
"Quacker's Waterproofing was wonderful. When they came for the estimate, they were fast and no nonsense. They weren't trying to convince me of things that needed doing or dramatizing the work for more money. When I had questions about the work, they didn't make me feel dumb but took extra time out of their day so that I had peace of mind with my foundation. I hope to never need their help again, but I will definitely call them if I do. Special kudos to Rob!"
+1
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"Had water damage from basement flooding. They came in did their thing and cant even tell there was damage. Employees are very kind, finished on time and cleaned up their mess. High recommend!"
+22
Serving Weldon Spring, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2018
Free estimates
Emergency services offered
"I called on Thanksgiving day and Chad (owner) responded that day and was able to come out to assess the issue the next day. He and his crew were very respectful of our belongings that had to be moved to deal with the mold. I would hire them again."
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
Professional Environmental Consulting Services specializing in asbestos inspections/testing, mold inspections, and indoor air quality testing for residential, commercial, and demolition projects. Reliable, thorough, and compliant inspections to help keep your property safe and meet local and state regulations. Contact us today for fast scheduling and expert service.
+9
Serving Weldon Spring, MO and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"Very professional but friendly and helpful."
+5
From average costs to expert advice, get all the answers you need to get your job done.
Mold remediation costs in St. Louis, MO can quickly escalate. But if you have mold in your home, mold remediation is worth it.
Mold remediation cost can quickly escalate. But if you have mold in your home, the cost for mold remediation is worth it.
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