Small-Area Mold Cleanup in Lewisville, TX: Understanding the 25-Square-Foot Rule

If you have spotted mold on a bathroom ceiling or behind a kitchen cabinet in your Lewisville home, your first question is probably "how big a deal is this?" In Texas, the answer often comes down to a single number: 25 contiguous square feet. That threshold, set by the Texas Department of Licensing and Regulation (TDLR), draws the line between cleanup you can handle with a general restoration crew and remediation that legally requires a TDLR-licensed mold contractor.

This article explains that rule in plain English so you know which situation you are dealing with before anyone touches the wall.

What the 25-Square-Foot Threshold Actually Means

TDLR regulates mold remediation in Texas, and it requires a special license once a mold problem reaches a certain size. The key word is "contiguous." That means a single connected patch of mold-affected material measuring 25 square feet or more, roughly the size of a 5-foot-by-5-foot square.

Below that threshold, Texas provides an exemption for small-area cleanup. That is the work Go Green Restoration performs. We are not a TDLR-licensed mold remediation company, and we do not present ourselves as one. We focus strictly on small, isolated spots under 25 contiguous square feet, and we are transparent about that limit from the first phone call. If your situation is larger or spread across several areas, you need a licensed remediator, and we will gladly refer you to one.

How to Tell Which One You Have

Measuring is more nuanced than eyeballing a stain, but a few practical signs help you gauge scope before scheduling anyone.

• A patch smaller than about 5 feet by 5 feet, confined to one spot, often falls under the small-area exemption.
• Mold appearing in multiple rooms, or behind walls across a wide span, usually points to a larger problem that needs a licensed contractor.
• Hidden growth from a slow leak can be far bigger than the visible stain suggests, so what looks small on the surface may not be.
• A musty smell with no visible mold often signals moisture inside wall cavities or under flooring, which warrants professional assessment.

Lewisville homes have their own risk patterns worth keeping in mind. Waterfront properties near Lake Lewisville deal with elevated humidity year-round, which lets small spots reappear if the moisture source is never corrected. Older mid-century homes in neighborhoods like Old Town Lewisville frequently have original plumbing, and a pinhole leak under a cast-iron drain line can quietly feed mold inside a cabinet for months. And after a hard spring hailstorm, a compromised roof can introduce just enough water to start a patch in an attic or ceiling corner.

What Small-Area Cleanup With Go Green Looks Like

When a spot genuinely falls under the 25-square-foot exemption, our approach centers on doing the cleanup correctly and, just as importantly, stopping it from coming back. We start by finding and addressing the moisture source, because mold is a symptom of a water problem. Cleaning the surface without fixing the leak or humidity issue simply resets the clock.

Because many Lewisville homes were built before lead-safe paint standards, our crews are EPA Lead-Safe certified, which matters any time cleanup involves disturbing older painted surfaces around a moldy area. We contain the small work zone, clean affected materials using proven methods, dry the area thoroughly, and verify that the moisture reading is back to normal before we consider the job finished. We will never claim to "remove all mold" or perform full remediation. Our work is scoped to small, contained spots, and we are upfront when something exceeds that.

If we arrive and find the problem is bigger than it looked, whether it crosses the 25-square-foot line or shows up in several places, we will tell you honestly and connect you with a TDLR-licensed mold remediation contractor who is legally qualified for that scope. We would rather give you accurate guidance than overstep what we are permitted to do.

When in Doubt, Get It Looked At

The hardest cases are the ones you cannot see. A faint musty odor in a Castle Hills hallway, a soft spot under a sink, or a ceiling shadow that keeps returning after you wipe it down all deserve a closer look before they grow past the small-area threshold. Catching a problem while it is still under 25 square feet keeps your options open and your costs down.

Go Green Restoration is bonded, insured, and IICRC- and EPA Lead-Safe certified, and we serve homeowners throughout Lewisville and the wider Dallas-Fort Worth metroplex. If you have found a small patch of mold or suspect a hidden moisture problem, call us at (469) 727-3217. We will assess the scope honestly, handle the small-area cleanup we are qualified for, and point you toward a licensed remediator if your situation calls for one.