Mold remediation costs $1,100 to $3,400 for a contained area. Whether you need a licensed contractor depends entirely on your state: Texas requires one above 25 contiguous square feet, Florida above 10, and most states require nothing at all. Clearance testing should be done by someone who did not do the removal.
Texas is one of the few states that regulates mold work, and the threshold is specific. Growth covering 25 contiguous square feet or more must be remediated by a TDLR-licensed Mold Remediation Contractor, working to a protocol written by a licensed Mold Assessment Consultant. TDLR must be notified at least 5 days before the project begins.
The separation of those two roles is the part worth understanding. The firm that tells you how much mold you have cannot be the firm you pay to remove it. If one company offers to test and then remediate, in Texas that is not convenience, it is the arrangement the rule exists to prevent.
Source: Texas Department of Licensing and Regulation, Mold Assessment and Remediation Rules.
| Mold job | Typical US range |
|---|---|
| Contained area, single room | $1,100 to $3,400 |
| Clean water dry-out that prevented growth | $3.75 to $7 per sq ft |
| Category 3 removal where materials come out | $12 to $25+ per sq ft |
Source: Angi and operator-published rate cards compiled August 2026. A range is never a quote, and a licensed state adds the assessor's fee on top.
A licensed project ends with clearance testing by the assessor, not by the remediator. Passing it produces a Certificate of Mold Remediation, which matters twice: Texas sellers are asked about mold at resale, and insurers ask for it too.
That certificate is the reason licensed remediation can be worth paying for even when an unlicensed cleanup would have been cheaper. You are buying the document as much as the work.
Mold can begin within 24 to 48 hours of a material staying wet, which is why remediation and water damage are usually the same event separated by a week. If a dry-out was done without moisture readings, assume the question is open rather than closed.
Once growth reaches 25 contiguous square feet, yes, and the assessor who writes the protocol must be a different licensed firm from the contractor who does the work. Below that threshold Texas does not require a licence, so the measured area is the first thing to establish.
The document a licensed assessor issues after remediation passes clearance. Texas home sellers use it to answer mold disclosure questions, and insurers ask for it, which is why it often justifies the licensed route on its own.
Not on a licensed Texas project. The Mold Assessment Consultant and the Mold Remediation Contractor must be separate, precisely because the party measuring the problem should not be the party paid by its size.
No, and in Texas, Florida and New York it legally cannot. The party measuring the problem should not be the party paid by its size, which is the arrangement those statutes exist to prevent.
Not as a remediation method. EPA guidance is that visible mold should be removed rather than killed in place, and porous material that has been colonised generally comes out.
Only if the moisture source is fixed. Remediation without finding the leak or the humidity problem behind it is a temporary result at full price.
Emergency Response
Call and a crew is dispatched - extraction the same day, drying equipment set the same visit, and the documentation your claim needs from the first hour.
