Plano sits in the middle of one of the fastest-growing stretches of North Texas, and mold problems here follow the housing stock and the weather rather than the city limits. A musty smell in a hallway with no visible leak, a stained bathroom ceiling, a wet baseboard over a slab — the question most people ask first is simple: who is allowed to touch this, and how far will they drive to get here? The answer involves two separate licensed trades, a state rule that starts at a very specific square footage, and a service map that reaches well past Plano’s borders. Knowing that map and knowing how to verify a license takes about ten minutes and can save a homeowner from hiring the wrong company for the wrong half of the job.
Where Mold Work Actually Happens Across Plano and Collin County
Plano stretches through southern Collin County, and the mold jobs that come out of it rarely stay neatly inside one city limit. A slab leak under an older ranch house near downtown Plano, a hail-bruised roof in Frisco, an attic air handler sweating through a McKinney summer, a bath fan venting straight into the attic in Allen — these are the same handful of water sources showing up under different ZIP codes. Independent, TDLR-licensed mold assessment and remediation companies that serve Plano generally also cover Frisco, McKinney, Allen, Richardson, Wylie, Murphy, The Colony and Carrollton, because the drive times are short and the housing stock has a lot in common.
Coverage matters for more than convenience. On a Texas job of 25 contiguous square feet of mold or more, the work is split between two different licensed companies: an assessment consultant who maps moisture and writes a written protocol, and a separate remediation contractor who performs the removal and drying. A project in far west Plano may need a consultant who can reach the property twice — once to write the protocol and again for clearance before containment comes down — plus a remediation crew in between. Scheduling stretches when the nearest qualified company is forty minutes away. That gap shows up hardest during storm weeks, when dozens of Collin County roofs leak at once and every licensed company is booked.
The mix of property types widens the map further. Plano has everything from 1970s subdivisions and townhome clusters to newer build on the northern edge, plus rental apartments, condos governed by HOAs, and small commercial suites. Renters dealing with a ceiling stain have rights under Property Code 92.052, and owners of larger apartment properties fall under a separate licensing threshold for on-site maintenance work. A quote request that names the property type — house, apartment, condo or business — tends to come back with better-matched companies than one that describes mold alone.
How to Verify a TDLR Mold License Before You Sign Anything
Texas regulates mold work more tightly than most states, and the enforcement mechanism is a public database. Both mold assessment and mold remediation require a license from the Texas Department of Licensing and Regulation under Occupations Code chapter 1958, and the same company may not perform both roles on one project. That single rule catches more homeowners off guard than any other. A company that offers to inspect, write the protocol and then remove the mold is offering something the state does not allow.
Verification is straightforward once you have a written quote. Look up the company name through the TDLR license search, then confirm three things: the name on the quote matches the name on the license, the license type matches the work being quoted, and the license is active rather than expired or suspended. Assessment and remediation licenses are not interchangeable, and a remediation contractor cannot issue the clearance report. Unlicensed assessment or remediation is a Class C violation with penalties of $2,000 to $5,000 per violation — a detail worth remembering when a quote arrives suspiciously cheap and the paperwork is thin.
Ask every company for three documents before work begins: the Consumer Mold Information Sheet, proof of at least $1 million in liability insurance, and the written protocol on jobs that require one. The protocol has to reach you at least a day before work starts. The remediation company then notifies TDLR at least five days ahead — or by the next business day in a water-damage emergency — and pays a $25 state fee. If the square footage comes in below 25 contiguous, none of this licensing sequence is required, which is why a small patch on a shower ceiling is often a DIY project and a stained ceiling under an attic air handler usually is not.
Getting two or three licensed companies to look at the same problem is where most people stall. A free quote request through a service built for mold remediation plano tx work routes one description to independent, TDLR-licensed companies covering your ZIP code, and each one contacts you directly. No company on that list performs the work on the site’s behalf, so the license check still belongs to you.
Matching the License Type to the Job, Scenario by Scenario
The right first call depends on what got wet. A slab leak on North Texas clay calls for an assessment consultant who can map moisture across a slab and rule out the foundation as an ongoing source; remediation without fixing that water source is a temporary fix, which is why TDLR notes that bleach alone is not a lasting solution. Hail damage and roof leaks usually mean attic decking, insulation and sometimes ductwork — and if mold may be in or near the air handler, the EPA advises keeping the system off until it has been inspected. Bathroom and ceiling stains often trace back to an exhaust fan dumping humid air into the attic rather than outdoors. Moldy coils, drain pans and ducts sit under separate Texas rules for HVAC work, and dark-colored mold does not automatically mean a toxic species; TDLR generally considers species testing unnecessary when the water problem is identified and corrected.
Cost conversations go smoother with the license structure in mind. Published national planning ranges — the kind compiled by This Old House, Fixr and HomeAdvisor — describe broad ballparks for assessment, containment, removal and drying, but they are not Plano quotes. Actual numbers come from the companies after they walk the property. Budget for the possibility of three invoices rather than one: the assessment and protocol, the remediation itself, and the clearance visit are billed separately, and the first and third come from a different licensed company than the second.
Two closing details belong in every timeline. Emergency water-damage jobs compress the state notification window to the next business day, so a company that cannot tell you how it files that notice is worth a second look. And within 10 days of completion, the remediation contractor must provide a Certificate of Mold Damage Remediation (TDI form MDR-1) signed by both licensees. Keep that certificate — insurers may not underwrite against the remediated damage it documents, and buyers are entitled to copies for five years. As of March 2026, license status, insurance and that certificate remain the three items most likely to decide whether a Plano mold job goes smoothly or turns into a dispute.