Licensed Mold Removal Plano: What Texas Rules Actually Require Behind the Wall
Why Plano Homes Get Mold—and Why the Water Source Comes First
Mold needs spores, food, and water. The first two are already present in nearly every Plano home. Water is the part that can be controlled, and in Plano it appears in a few predictable ways. Summers are long and humid, with DFW dew points in the mid-60s for about five months. Many Collin County homes sit on a slab over shrink-swell Blackland clay, so instead of a wet basement, a slab leak can soak a wall from below. Add an attic air handler, a hail-tested roof, and the burst pipes of February 2021, and the common sources become clear.
That matters because a stain is a symptom, not the whole problem. Scrubbing visible growth with bleach or a store-bought spray may change the appearance, but TDLR notes that bleach without fixing the water is not a lasting fix. Licensed work is judged on whether the company finds the water source, keeps spores contained during work, and proves materials are dry before the wall is closed. In Plano’s older east and central tracts, original cast-iron drains under the slab help explain why slab leaks are so often the cause. West Plano homes from the 1990s and 2000s are often two stories with the air handler in the attic, and many sat under the June 2012 and April 2016 hail paths.
Before anyone cuts into drywall, practical steps matter. Stop the water if it is safe to do so. Do not scrub, sand, or bleach a large area. Photograph the original condition. Keep children and pets out of the affected space. If mold may be in or near the air handler or ducts, the EPA says not to run the system until it has been checked. The EPA also notes that wet materials dried within 24 to 48 hours usually do not grow mold.
Texas treats 25 contiguous square feet as the line where hired work requires licensed companies. Below that threshold, a homeowner may clean or hire anyone. At or above it, the job is no longer a simple wipe-down. The first conversation should describe moisture history and visible spread, not just “black stuff on the drywall.” That description helps an assessor decide where to meter, where to look for hidden water, and how far containment may need to run.
The Two-Company Rule: Assessment, Protocol, and the Licensed Remediation Sequence
For hired work of 25 contiguous square feet or more, Texas law lays out a specific sequence. Two different licensed companies are involved, and the same company may not perform both roles on one project. This separation is central to what licensed mold work in Plano actually includes. It prevents the company selling the removal from also writing its own clearance report.
The first company is a TDLR-licensed mold assessment consultant. The assessor meters walls and floors, traces the water source, and marks how far the damage runs. The assessor then writes a written protocol specific to the house: rooms, quantities, methods, containment, and clearance criteria. The protocol must be provided at least a day before work starts. Without that document, a remediation crew is working without the project-specific scope Texas expects.
The second company is a separate TDLR-licensed remediation company. It writes a work plan that follows the protocol and notifies TDLR five days ahead, or by the next business day in a water-damage emergency. The notification fee is $25. On site, containment usually means plastic sheeting, a zipper door, and a HEPA air scrubber to keep spores out of the rest of the house, with yellow project signs posted at entrances. Porous material with growth—such as drywall, insulation, and carpet pad—is cut out and bagged inside containment. Framing and concrete are HEPA vacuumed and cleaned. Air movers and dehumidifiers then run until framing and slab reach the protocol’s dry target. Drying often sets the schedule.
Before containment comes down, the assessor returns for a clearance assessment. The assessor checks visually and performs any sampling the protocol calls for, then writes a passed clearance report. Within 10 days of finishing, the property owner receives a Certificate of Mold Damage Remediation on TDI form MDR-1, signed by both companies. That certificate matters beyond the job site. Under Insurance Code 544.303, an insurer may not underwrite against a home because of remediated mold damage shown on the certificate, and sellers must give buyers every certificate from the prior five years. Unlicensed work carries a $2,000 to $5,000 TDLR penalty per violation, and up to $5,000 a day under Occupations Code 51.302.
What the Job Costs, How Insurance Fits, and What to Ask Before Drywall Comes Down
Size, material removed, containment, drying, and rebuild drive the number. Assessment, protocol, and clearance are separate invoices from a separate company. Published national planning ranges give a rough frame, but they are not Plano quotes. Remediation commonly runs $10–$25 per square foot, averaging about $18, according to This Old House in March 2026 and Fixr in August 2025, which lists $10–$30. A typical whole job falls around $1,500–$9,000 nationally, with an average near $3,500, per Fixr in August 2025. This Old House in March 2026 gives small-area ranges of about $500–$1,250 for 50 square feet, $1,000–$2,500 for 100, $2,000–$5,000 for 200, and $5,000–$12,500 for 500. Whole-house work is listed at $10,000–$30,000 by Fixr in August 2025. A licensed assessor’s inspection and testing from a separate company runs $303–$1,044, averaging about $670, with air-sample lab fees of $250–$350, per HomeAdvisor in 2025. HomeBlue listed a dated Plano range of $10–$19 per square foot in March 2022. Actual quotes come from the companies after they look at the job, not from this site.
Insurance is separate from the remediation contract. Texas policies usually cover a sudden and accidental discharge of water and usually do not cover a continuous leak. Most pay to remove mold only as part of repairing covered damage, and many cap or exclude mold remediation unless endorsed. Report hidden losses within 30 days of discovery. Nothing here promises coverage. Permits are another practical point: cutting out and cleaning mold-damaged material usually needs no Plano permit, but plumbing, foundation, HVAC, roof, and wall rebuilds do, by city-registered contractors. Confirm with Plano Building Inspections.
Before drywall comes down, ask for the assessor’s license and the remediator’s license, and verify them through the Texas Department of Licensing and Regulation. Ask whether the assessor and the remediation company are truly separate. Ask to see the written protocol before work begins, then the work plan and TDLR notification. Ask how containment and negative air will be set up, how drying will be verified, and who will perform clearance. Get at least two written quotes. A free quote service can shorten the search: describe the problem once and independent TDLR-licensed companies reply with quotes, with no obligation to hire. You can start by requesting mold removal plano quotes, then compare the scope, the protocol, and the clearance terms side by side. Ask for both the clearance report and the MDR-1 certificate before the project is considered finished.
