Mold Testing Cost in Texas (2026): Inspection Prices

Mold inspection cost: national ranges from two cost guides

At the low end, Fixr describes a $300 job for a 1,000-square-foot home with one sample. At the high end, about $1,000 for a larger home with two samples, lab testing and drywall removal to reach hidden mold.

Texas price point. Bob Vila lists an average range of $200 to $625 in San Antonio. We could not find a published figure for other Texas cities, so get two or three quotes from licensed San Antonio, Houston or Dallas testing companies to see your local market.

Mold test cost by home size

"Mold testing" covers several different services. Here is what each one is and what it costs.

Cost of mold test by sample type

Visual inspection. A good assessor spends most of the visit looking, not sampling: checking for leaks, measuring moisture and finding the source. TDLR describes mold assessment as an inspection to evaluate whether mold growth is present and to what extent, and notes that sampling is not necessary in many cases.

Air samples pull a measured volume of air through a cassette. They are usually compared with an outdoor sample, because mold spores are always present at some level in the air. They can hint at hidden growth, but there's a limit to what they prove: the EPA says there are no EPA regulations or standards for airborne mold contaminants.

Surface samples (swab or tape) identify what a visible spot is. They are cheap but rarely change what you do, since visible mold gets removed whatever its species.

Most inspection prices bundle the lab work. When they don't, here is what the lab adds:

• Basic testing without lab analysis runs $250 to $350, rising to $400 to $500 if samples go to a lab.
• Mold culture: about $50 on top of sample collection; Fixr says $50 to $75.
• Stain testing: about $150 extra; Fixr says $150 to $200.

Labor makes up roughly 60% of the price, with tools and testing supplies about 40%. So the biggest drivers are the size of the home, how many samples are taken, and how hard the areas are to reach.

In Texas, labs that analyze mold samples must also be licensed and meet certain qualifications, and TDLR lists a separate Mold Analysis Laboratory license. Ask your assessor which lab they use.

What about ERMI testing?

ERMI (Environmental Relative Moldiness Index) is a DNA-based dust test you may see marketed online. The EPA describes it as a research tool developed by EPA scientists that has been peer reviewed for research purposes but has not been validated for non-research purposes. We couldn't find an ERMI price from a cost guide we trust, so we don't list one. If someone recommends ERMI, ask what decision the result will change.

Home kits cost $40 or less, which makes them tempting. Here's the trade-off:

The biggest weakness of a kit is interpretation. TDLR says mold sample results cannot be interpreted without physical inspection of the contaminated area or without considering the building and what led to the problem. The EPA likewise says sampling should be conducted by professionals with experience in sampling design and interpretation. Fixr notes kits have questionable reliability and suggests verifying results with a professional.

It is legal to test your own home. TDLR says a homeowner can take samples for mold or clean it up in the home without a license. Our guides on mold test kits and how to test for mold explain what kits can and can't tell you.

Testing pays off when the result will change what you do next. Three common cases:

• You smell mold but can't find it. An assessor can trace hidden moisture. TDLR suggests checking plumbing access areas, crawl spaces, behind mirrors and furniture, attics, closets and cupboards, which are the same places a pro will look.
• You're about to hire a licensed removal company. In Texas, that company must work from a protocol developed by a licensed Mold Assessment Consultant, so the assessment is part of the job.
• The cleanup is finished. The EPA says surface sampling may be useful to determine if an area has been adequately cleaned or remediated.

If none of those apply and the mold is small and visible, put the money toward fixing the leak instead.

Licensed assessors only. Texas law says a person may not engage in mold assessment unless the person holds a mold assessment license. TDLR licenses both a Mold Assessment Technician and a Mold Assessment Consultant. Only a consultant can write the remediation protocol you'll need for licensed removal; TDLR says a licensed remediation contractor must follow a protocol developed by a licensed Mold Assessment Consultant. You can check any license with our license check tool.

The tester can't be the remover. Texas law says a license holder may not perform both mold assessment and mold remediation on the same project. Be wary of a "free mold inspection" offered by a removal company. Some companies offer free testing if you contract with them for remediation, but on a licensed Texas job that bundle isn't allowed. Our guide on why testing and removal are different companies explains why.

Expect a second visit if you remediate. After licensed cleanup, a consultant must do a post-remediation assessment before the job can pass. Ask for the clearance visit price when you get your first quote. See mold clearance testing.

Insurance rarely pays for testing. The Texas Department of Insurance says most home policies don't include mold cleanup and testing after a damaged item is removed.

1. Say what you need. "Find the source of a musty smell" and "clearance after remediation" are different jobs at different prices.
2. Ask how many samples, and why. Each extra sample adds about $60 to $80. The assessor should explain what each one is for.
3. Agree on the criteria first. TDLR advises agreeing what will be acceptable results for any air sampling or surface sampling before the project starts, because there are no national or state standards for a "safe" level of mold.
4. Ask whether the protocol is included. If removal is likely, a quote that includes the written protocol saves a second trip.
5. Hire only testing companies for testing. Browse licensed testing companies in Austin, Fort Worth, El Paso, Corpus Christi or Lubbock, or start from our Texas page. Read how we verify every listing.

If testing confirms you need cleanup, our mold remediation cost guide covers the next bill.