Mold Removal & Remediation in Katy, TX

A three-county city on the prairie

Katy sits where Harris, Fort Bend and Waller counties meet, about 19 miles west of Houston along I-10. It grew as a railroad and rice-farming town, and Cane Island Creek, a branch of Buffalo Bayou, runs through the area, with Buffalo Bayou's floodplain and tributaries crossing the surrounding prairie. Flat ground and slow-draining clay keep yards and slabs wet after heavy rain, and the long cooling season keeps attic equipment and ducts damp.

What to do right now

1. Find and stop the moisture. A dripping drain pan, a cracked supply line or a roof leak has to be fixed before any cleanup will last.
2. Dry what you can within 24 to 48 hours. EPA says that's the window to prevent growth on wet materials.
3. Leave the visible growth for the professionals. Wiping or scraping a large patch spreads spores; never paint over it.
4. Keep the system off if vents or ducts show growth. EPA warns that a contaminated HVAC system can spread mold through the house.
5. Book the assessment first. Under Texas law the consultant who writes the protocol can't be the company that removes the mold.
6. Check your address. Inside city limits, the City of Katy Permit and Building Services Division handles permits for remodeling and roofing; Katy-addressed homes outside the city fall under Harris, Fort Bend or Waller County.

Signs and likely causes

Cost factors

Angi's Houston cost data reports typical mold removal between $863 and $3,329. HomeGuide's 2026 national ranges put HVAC or duct remediation at $2,000 to $10,000 and partial attic work at $1,500 to $6,000. Your price depends on the affected area, the materials that have to be cut out, attic or duct access and whether the leak is fixed. Add the consultant's protocol and clearance visit, which Texas law requires to be a separate company from the remediator.