Texas mold laws, from the statute and TDLR

• Texas requires a mold assessment license to perform mold assessment and a mold remediation license to perform mold remediation. “A person may not engage in: (1) mold assessment unless the person holds a mold assessment license; or (2) mold remediation unless the person holds a mold remediation license.” (Tex. Occ. Code ch. 1958, §1958.101, checked 2026-09-23)
• A Texas mold license is valid for two years. “A license issued under this chapter is valid for two years.” (Tex. Occ. Code ch. 1958, §1958.1011, checked 2026-09-23)

• Anyone may perform mold remediation without a license when the mold affects less than 25 contiguous square feet for the project. “A person is not required to be licensed under this chapter 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.” (Tex. Occ. Code ch. 1958, §1958.102(c), checked 2026-09-23)
• An owner or tenant, or their managing agent or employee, does not need a license to do mold assessment or remediation on property they own or lease. “An owner or tenant, or a managing agent or employee of an owner or tenant, is not required to be licensed under this chapter to perform mold assessment or mold remediation on property owned or leased by the owner or tenant.” (Tex. Occ. Code ch. 1958, §1958.102(a), checked 2026-09-23)
• The owner-and-tenant exemption does not apply to remediation of 25 contiguous square feet or more. “This exemption does not apply: (1) if the managing agent or employee engages in the business of performing mold assessment or mold remediation for the public; (2) if the mold remediation is performed in an area in which the mold contamination affects a total surface area of 25 contiguous square feet or more” (Tex. Occ. Code ch. 1958, §1958.102(a), checked 2026-09-23)
• A licensed mold remediation contractor hired for a job under 25 contiguous square feet still has to follow the law and rules. “A licensed MRC performing a small mold remediation project (less than 25 contiguous square feet) is not exempt from the law and rules.” (TDLR, Mold Assessors and Remediators FAQs, Minimum Area Exemption, checked 2026-09-23)
• A licensed remediation contractor on a small job must still follow a work plan based on a protocol developed by a licensed mold assessment consultant. “if a licensed MRC is hired by the consumer, the MRC must comply with the requirements in the law and rules, including the development of a work plan that follows a protocol developed by a licensed Mold Assessment Consultant (MAC).” (TDLR, Mold Assessors and Remediators FAQs, Minimum Area Exemption, checked 2026-09-23)

• A Texas license holder may not perform both mold assessment and mold remediation on the same project. “A license holder may not perform both mold assessment and mold remediation on the same project.” (Tex. Occ. Code ch. 1958, §1958.155(a), checked 2026-09-23)
• No one may own an interest in both the assessment company and the remediation company on the same project. “A person may not own an interest in both the entity that performs assessment services and an entity that performs remediation services on the same project.” (Tex. Occ. Code ch. 1958, §1958.155(b), checked 2026-09-23)

• A licensed consultant may inspect after remediation and sign a Certificate of Mold Damage Remediation (Texas Department of Insurance Form MDR-1) stating the property does not contain evidence of mold damage. “may, however, conduct a post-remediation inspection and sign/deliver a Certificate of Mold Damage Remediation (Department of Insurance Form MDR-1) certifying that he or she has inspected the property and determined that it “does not contain evidence of mold damage.”” (TDLR, Mold Assessors and Remediators FAQs, Homeowner/Building Owner Exemption, checked 2026-09-23)
• A consultant who did not prepare a remediation protocol before the work cannot declare that the project achieved clearance. “A consultant who has not prepared a mold remediation protocol in advance of a remediation project cannot declare that the project has achieved clearance.” (TDLR, Mold Assessors and Remediators FAQs, Homeowner/Building Owner Exemption, checked 2026-09-23)

• TDLR does not inspect or test homes for mold and cannot make a landlord or property owner clean up mold. “TDLR does not inspect or test homes for mold problems, and cannot make a landlord or property owner clean up mold that might be present in a home.” (TDLR, Mold Assessors and Remediators FAQs, Mold in Rental Housing, checked 2026-09-23)
• A renter who believes unlicensed, non-exempt people are doing mold assessment or remediation may file a complaint with TDLR. “If a renter believes non-licensed persons are conducting mold assessment or remediation activities and are not exempted from regulation, the renter may file a complaint with TDLR.” (TDLR, Mold Assessors and Remediators FAQs, Mold in Rental Housing, checked 2026-09-23)
• TDLR notes that certain exemptions apply to buildings with fewer than 10 rental units, including houses. “Also, there are certain exemptions that apply for buildings containing less than 10 rental units, including houses.” (TDLR, Mold Assessors and Remediators FAQs, Mold in Rental Housing, checked 2026-09-23)
• A Texas landlord must make a diligent effort to repair a condition that materially affects the physical health or safety of an ordinary tenant, when the tenant has given notice where rent is normally paid and is not behind on rent. “A landlord shall make a diligent effort to repair or remedy a condition if: (1) the tenant specifies the condition in a notice to the person to whom or to the place where rent is normally paid; (2) the tenant is not delinquent in the payment of rent at the time notice is given; and (3) the condition: (A) materially affects the physical health or safety of an ordinary tenant” (Tex. Prop. Code §92.052, checked 2026-09-23)

• TDLR's renter guidance says the CDC does not recommend routine sampling for molds. “the Centers for Disease Control (CDC) does not recommend routine sampling for molds.” (TDLR, Mold Assessors and Remediators FAQs, Mold in Rental Housing, checked 2026-09-23)
• TDLR says standards for an acceptable or normal quantity of mold have not been established. “Also, standards for judging what is an acceptable, tolerable, or normal quantity of mold have not been established.” (TDLR, Mold Assessors and Remediators FAQs, Mold in Rental Housing, checked 2026-09-23)

Not below 25 contiguous square feet. An owner or tenant does not need a license for mold work on property they own or lease, but that exemption does not apply to remediation of 25 contiguous square feet or more.

Not on the same project. Occupations Code §1958.155 says a license holder may not perform both mold assessment and mold remediation on the same project, and no one may own an interest in both companies on that project.

No. TDLR's own guidance says it does not inspect or test homes for mold and cannot make a landlord or property owner clean up mold. A renter can file a complaint with TDLR about unlicensed mold work that isn't exempt.

It is Texas Department of Insurance Form MDR-1. After remediation, a licensed consultant can inspect and sign it to certify that the property does not contain evidence of mold damage.