Mold remediation cost in Texas

Texas's climate zones and where mold grows

The IECC map divides Texas into 2A (79 counties), 3B (70 counties), 3A (63 counties), 4B (28 counties), 2B (14 counties). The dominant zone is IECC climate zone 2A (hot, moist), which the Building America program calls a hot, humid climate. The second largest share of counties sits in zone 3B, so the mold story changes from one part of the state to another.

Most of Texas sits in the hot-humid band, where air conditioning runs most of the year and outdoor air carries moisture almost every month. A cooled house pulls that vapor inward through walls, around windows, and into supply ducts, and it condenses on the first cold surface it meets. That is why remediation crews here open up closets on exterior walls, the backs of vinyl wallpaper, duct boots behind registers, and the attic around uninsulated duct runs.

Attics and crawl spaces take the worst of it. An attic with ducts in it sweats on the duct jackets through summer, and a crawl space with open vents breathes humid air across cool joists all season. EPA's target of indoor humidity below 60 percent, ideally 30 to 50, is hard to hold here without a dehumidifier or a correctly sized system, and oversized air conditioners that short-cycle leave rooms cool and damp.

Counties in zone 3B

The hot, dry part of Texas is hot and dry. Outdoor humidity stays low most of the year, so mold here is almost always a water problem rather than a climate problem: a slab leak, a roof leak after a short wet season, a failed supply line, an evaporative cooler that stays wet, or irrigation soaking the soil against a slab. The growth is local and traceable, which keeps most jobs at the small end of the band once the leak is fixed.

Whatever the zone, EPA's guidance holds statewide: keep indoor humidity below 60 percent, ideally between 30 and 50, do not run an HVAC system you suspect is contaminated, and treat any area over about 10 square feet, or any growth after a lot of water damage, as a professional job.

Texas's housing stock

By the American Community Survey, the median home in Texas was built in 1992. Houses from the 1990s and early 2000s are tighter still, wrapped in house wrap and sealed at the windows, with larger bathrooms, more fixtures, and ducts that often run through the attic. When flashing or an exterior finish system fails on one of these houses, water gets in and cannot get out, and the growth stays hidden until it reaches a baseboard.

The common calls in this stock are window and door flashing, bath fans vented into the attic instead of through the roof, and condensation on supply ducts in hot attics. These houses reward a moisture inspection before any demolition, because the extent is rarely what the stain suggests.

Texas is in the South, where slabs dominate. Of new single-family houses completed in the region in 2025, 88 percent sat on a slab, 8 percent over a crawl space, and 4 percent on a basement, per the Census Bureau's Characteristics of New Housing. Older houses here are more likely to have a crawl space, which in a humid climate is the most common place crews find hidden growth. Slab houses move the problem to plumbing walls, bathrooms, and the attic where the ducts run.

Flood exposure across Texas

FEMA's National Risk Index rates 16 of Texas's 254 counties Relatively High or Very High for inland flooding, and 2 for coastal flooding. Those counties hold about 66 percent of the state's people, so a large share of Texas homeowners live where a water event is a real possibility and the post-flood sequence matters: pump, dry, verify, then remediate.

Flood water is Category 3. Drywall gets cut above the water line, insulation and carpet come out, and extraction and drying are priced apart from the mold work at $3.00 to $7.50 per square foot of wet floor. Homeowners policies exclude flood; a separate flood policy, where one exists, is the policy that pays for flood-caused mold.

What mold work costs in Texas

The bands on this page are national. No primary source publishes a mold remediation price index for Texas, and this site does not invent one, so the engine applies no regional multiplier. A local quote can land above or below these figures. The scope lines are what to compare.

These are the same bands the estimate flow uses. Where the mold is, how large the area is, whether it is visible, any water event in the last 90 days, and HVAC involvement decide which lines apply and where the total lands.

Hiring a remediation company in Texas

Texas regulates mold work. Texas licenses mold assessment consultants and technicians and mold remediation contractors through TDLR, and registers remediation workers. Areas under 25 contiguous square feet can be cleaned by unlicensed people; at 25 contiguous square feet or more, a licensed contractor files a notification with the state. The agency is the Texas Department of Licensing and Regulation, and its public lookup is the place to check a license before signing anything.

Licensing does not set prices or guarantee workmanship. Ask for a written scope that separates inspection from remediation, a moisture-source plan, containment and negative air on any job over about 10 square feet, and a clearance step at the end. Companies that quote the remediation without doing the inspection are guessing.

Insurance in Texas

Homeowners policies that cover mold usually cap it at $1,000 to $10,000, and some carriers start the sublimit at $2,500 to $5,000. Coverage usually requires a sudden covered peril such as a burst pipe. Long-term leaks, floods, sewer backups, and ground seepage are commonly excluded. Read the declarations page and ask your agent before the work starts; the cap can sit well below a whole-house job.

Texas cities with their own page

Each city page adds county-level climate, median year built, and FEMA flood ratings, and routes requests to the featured remediation company for that city.

• Houston: Harris County, zone 2A, median home built 1982, inland flood rating Very High.
• San Antonio: Bexar County, zone 2A, median home built 1985, inland flood rating Very High.
• Dallas: Dallas County, zone 3A, median home built 1981, inland flood rating Very High.
• Austin: Travis County, zone 2A, median home built 1994, inland flood rating Relatively High.
• Fort Worth: Tarrant County, zone 3A, median home built 1994, inland flood rating Relatively High.
• El Paso: El Paso County, zone 3B, median home built 1984, inland flood rating Relatively High.
• Arlington: Tarrant County, zone 3A, median home built 1986, inland flood rating Relatively High.
• Corpus Christi: Nueces County, zone 2A, median home built 1982, inland flood rating Relatively High.
• Plano: Collin County, zone 3A, median home built 1993, inland flood rating Relatively High.
• Lubbock: Lubbock County, zone 3B, median home built 1984, inland flood rating Relatively Moderate.
• Laredo: Webb County, zone 2B, median home built 1997, inland flood rating Relatively Moderate.
• Irving: Dallas County, zone 3A, median home built 1986, inland flood rating Very High.
• Garland: Dallas County, zone 3A, median home built 1978, inland flood rating Very High.

How the estimate works in Texas

Answer seven questions and the band appears on screen before you share any contact details. Send it on and it goes to the featured remediation company for your city, or to us by hand where no company has claimed it. Texas has about 30,188,424 residents by the ACS, and every address in the state can use the estimate.