AC & Air Duct Mold Removal in Alvin, TX

Signs the system may be growing mold

• Black or green speckling on supply grilles and the paint around them
• A damp, musty odor in the first minutes of each cooling cycle
• A wet ceiling patch or sagging drywall under the air handler
• Algae or sludge in the condensate line or pan
• Duct insulation in the attic or under a manufactured home that is wet to the touch
• A humidity reading that stays above 60 percent indoors

Local conditions in Alvin

Alvin is a Brazoria County city about 27 miles from Houston along SH 35 and SH 6, home to Alvin Community College and Nolan Ryan's hometown. It has a striking rain record: in July 1979, Tropical Storm Claudette stalled over the city and dropped about 45 inches in 42 hours, including 43 inches in 24 hours, at the time the highest 24-hour total in American history. Hurricane Ike in 2008 damaged buildings badly enough that the Alvin Library closed for repairs. Storms like these send water into attics through damaged roofs, where it soaks duct insulation and air handlers. Alvin also has manufactured home parks, and in those homes the ducts usually run under the floor, where humid air and poor drainage can keep them damp. The everyday driver, though, is a cooling season that keeps coils and pans wet for months.

What affects cost

National ranges (HomeGuide, 2026) put mold work on an HVAC system or ducts at $2,000 to $10,000. The final number depends on how much ductwork is involved, whether flex duct or a belly duct under a manufactured home has to be replaced, access to the attic or underfloor space, and any coil, pan or drain repairs. Because Texas law separates assessment from remediation on one project, budget for the consultant's protocol and clearance visit too.

What happens when you call

You're connected with an independent local company. A mold assessment consultant who holds a TDLR license inspects and writes a protocol, a separate remediation company does the work, and a post-remediation assessment checks the result. Alvin requires permits and inspections for remodeling and repairs, and residential owners must show proof of homestead exemption before buying permits; call Permits & Inspections at 281-388-4271. Renters can report unrepaired problems to Code Compliance at 1100 W Highway 6.