What EPA says about mold sampling
The U.S. Environmental Protection Agency's mold guide is direct: "In most cases, if visible mold growth is present, sampling is unnecessary. Since no EPA or other federal limits have been set for mold or mold spores, sampling cannot be used to check a building's compliance..."
Texas agencies point the same way. The Texas Department of Licensing and Regulation (TDLR) consumer sheet says, "Generally, it's not necessary to identify the species of mold growing in a residence, and the Centers for Disease Control (CDC) does not recommend routine sampling for molds." TDLR's FAQ adds that "testing to determine what kind of mold is present is not required prior to remediation or cleaning."
In other words, if you can already see mold on a wall, ceiling or cabinet, a test result is unlikely to change what needs to happen next: find the water, fix it, and clean up or remove what is affected.
What a DIY mold test kit can and cannot tell you
Consumer kits vary, and we do not sell or recommend any particular kit. In general, though, there are limits worth knowing before you buy one:
- There is no federal pass or fail number. As EPA notes, no federal limits exist for mold or spores, so a kit result has no official standard to compare against.
- A result does not find the moisture source. EPA's guide says "If you clean up the mold, but don't fix the water problem, then, most likely, the mold problem will come back." A sample in a dish does not show where water is getting in.
- It does not measure how much material is affected. Under Texas law the size of the contaminated area matters for who may do the cleanup (more on that below), and a kit does not tell you square footage.
- It does not produce a remediation protocol or a clearance. Those documents come from a licensed mold assessment consultant on a licensed project.
A kit is your own purchase on your own property. If you choose to use one, treat the result as a data point rather than a diagnosis, and talk to a doctor if anyone in the home has health concerns.
Texas has no small-area exemption for mold assessment
Many people know about Texas's 25 square foot rule for mold cleanup. Fewer know it applies to remediation only.
Texas Occupations Code §1958.101(a) says a person may not engage in "mold assessment unless the person holds a mold assessment license." The small-job exemption in §1958.102(c) says a person is not required to be licensed "to perform mold remediation in an area in which the mold contamination affects a total surface area for the project of less than 25 contiguous square feet." That subsection covers remediation. There is no matching small-area exemption for assessment.
So if you hire someone to inspect, investigate or survey your home for mold, Texas law requires that person to hold a TDLR mold assessment license, no matter how small the area. The statute defines mold assessment in §1958.001(5) to include an inspection, investigation or survey "to provide the owner or occupant with information regarding the presence, identification, or evaluation of mold."
The homeowner side is different. Under §1958.102(e), an owner is not required to be licensed to perform mold assessment or mold remediation on a residential property they own with fewer than 10 dwelling units, and 16 TAC §78.30(b) says that applies regardless of the area affected. That is why a homeowner can use a kit in their own house without a license, while a company selling "mold testing" to the public needs one.
SB 1255 (2025) changed parts of chapter 1958, and TDLR says current rules stay in effect while new ones are adopted. This is general information, not legal advice.
What a licensed mold assessor does differently
A licensed assessor's job is broader than collecting a sample. On a typical visit, a licensed assessor will look for visible growth and the moisture source behind it, judge how far the damage reaches, and decide whether sampling would actually answer a question. Under 16 TAC §78.52, the consultant's license number and expiration date go on each report and plan, so you can check who signed it.
On a licensed project, the steps run in order:
Assessment and protocol
A licensed mold assessment consultant evaluates the area and writes a remediation protocol that says what must be removed or cleaned.
Remediation by a separate company
Texas Occupations Code §1958.155 says a license holder "may not perform both mold assessment and mold remediation on the same project." A different licensed remediator does the work.
Clearance
16 TAC §78.140(a) says a licensed consultant "shall conduct a post-remediation assessment using visual, procedural, and analytical methods" to confirm the area is free of visible mold and the protocol was followed.
Certificate
Within 10 days of finishing, the owner receives a Certificate of Mold Damage Remediation (TDI form MDR-1), per §1958.154.
One catch for do-it-yourselfers: TDLR's FAQ says a consultant "who has not prepared a mold remediation protocol in advance of a remediation project cannot declare that the project has achieved clearance." A kit result after a DIY cleanup is not a clearance.
When a professional assessment is worth the cost
- You smell mold but cannot see it, which can mean growth inside walls, an attic or HVAC equipment.
- The affected area looks large, or spans more than one room.
- There was a known water event, such as a slab leak, a roof leak after hail, or flooding.
- You plan to hire a remediator for a job of 25 contiguous square feet or more, which in Texas requires a protocol and clearance from a licensed assessor.
- You want paperwork for insurance or a future sale. See our guide to insurance and the MDR-1 certificate.
What mold inspection and testing typically cost
These are typical national ranges from cost guides, 2024–2026, not quotes. The real price comes from licensed pros after an on-site assessment.
| Item | Typical range |
|---|---|
| Mold inspection | $450–$800 (HomeAdvisor data via Bob Vila: $299–$1,014, avg about $656) |
| Air sample testing | $250–$350 (advanced up to $700) |
| Inspection + remediation, average home | $1,950–$5,800 |
The full table is on our mold remediation cost page.
How to find a licensed assessor in Lubbock
Ask any company for its TDLR license number and check it on TDLR's license search. Look for the "Mold Assessment Consultant" or "Mold Assessment Company" license type. Our step-by-step guide to verifying a TDLR mold license shows how.
We connect Lubbock-area homeowners with TDLR-licensed mold assessors and remediators for free, no-obligation quotes. Tell us what you are seeing and we will help you get quotes from licensed local pros. The quote is free; the inspection itself is done and priced by a licensed assessor. Learn more on our mold inspection and testing page.