Request a referral, and a local provider will contact you to discuss the visit, scope, and price.
Houston is humid, rainy, and flat. That combination shapes every mold job here. A small leak can stay damp for a long time. A heavy rain can push water into walls, floors, and crawl spaces. This page is for the City of Houston only, with local facts, services, and permit notes.
Services available in Houston
- Mold inspection and testing. Moisture checks, source tracing, and testing when it changes the plan.
- Mold remediation. Cleanup, drying, and moisture source repair.
- Basement mold removal. Below grade rooms and humidity control, where relevant.
- Bathroom mold removal. Showers, fans, grout, and plumbing leaks.
- Attic mold removal. Roof leaks and condensation in attics.
- Crawl space mold treatment. Ground moisture, vents, and plumbing under the home.
If you have active flooding or sewage, contact a local emergency service first. This site covers non-emergency work.
Local facts checked for Houston
- Houston has a humid subtropical climate, with hot, humid summers and mild winters, according to Climate of Houston.
- The National Weather Service Houston/Hobby Airport annual climate report gives a 1991 to 2020 normal annual precipitation total of 55.62 inches, according to the National Weather Service Houston annual climate report.
- At Houston Intercontinental Airport, average relative humidity is 74.7 percent in the 1991 to 2020 climate table, according to Climate of Houston.
- The City of Houston had 990,632 total housing units in the 2017 to 2021 ACS five year estimate, with 4 percent built in 1939 or earlier and 14 percent built from 1940 to 1959, so 18 percent built before 1960, according to the City of Houston Year Structure Built table.
- Houston's flat landscape is noted in the climate article because flash flood warnings are common there and heavy rains often threaten life and property, according to Climate of Houston.
- Mold can form in as little as 2 to 3 days if materials stay damp, according to Texas A&M AgriLife Extension.
- EPA advises drying water-damaged areas and items within 24 to 48 hours to prevent mold growth, and keeping indoor humidity below 60 percent, according to the EPA guide to mold and moisture.
What Houston conditions mean for your home
Humidity is the background factor. It keeps surfaces damp, especially in bathrooms, closets, and rooms with poor air flow. Rain is the trigger factor. Heavy rain can expose roof faults, window faults, and drainage faults in a single storm.
Flat ground is the third factor. Water does not drain quickly from a flat lot. It can pool near a foundation, enter through joints, and soak lower walls. That is why grading, gutters, and downspout extensions matter in Houston, even for an indoor mold job.
Older homes need extra checks. Plumbing joints, roof flashing, and ventilation systems age. A provider should check the attic, the rooms below bathrooms, and the lower walls, not just the visible spot.
Neighborhoods and ZIP codes served
This page covers the City of Houston only.
- The Heights: 77008, 77009, 77018.
- Montrose: 77006, 77098.
- River Oaks: 77019, 77027.
- EaDo and East End: 77003, 77011, 77023.
- Galleria and Uptown: 77056, 77057.
- Energy Corridor and West Houston: 77041, 77077, 77079.
- Clear Lake area inside Houston: 77062, 77058 in part.
ZIP boundaries can cross city limits. Confirm your address with the provider. A provider may serve a nearby area, but this page does not claim coverage for suburbs outside Houston.
Permits and local rules in Houston
The permit office is the Houston Permitting Center. It provides a centralized location for the issuance of a majority of City of Houston permits and licenses, including building permits, and Building Code Enforcement enforces the City of Houston Construction Codes for residential and commercial construction, according to the City of Houston permits page.
Surface cleaning alone usually needs no building permit. Structural repair, plumbing, electrical work, and floodplain work may need permits or inspections. This page is not legal advice. Ask the provider, and check the Houston Permitting Center, before work starts.
If your home is in a floodplain, tell the provider. Floodplain rules can affect repair scope and documentation. Do not assume a standard repair plan fits a floodplain home.
Cost factors in Houston
We give no price range here, because no cited public source in this batch gives a Houston mold remediation range. Cost depends on the job, not the city name alone.
- Size of the affected area, and whether water reached wall cavities.
- Drying time in a humid climate, which can be longer than in a dry climate.
- Removal of soaked drywall, insulation, or flooring after a flood.
- Drainage, grading, or plumbing repair, which may need another trade.
- Access, including tight crawl spaces and multi-story homes.
- Permit and inspection needs for structural or trade work.
Get a written scope that includes drying and the water fix. A low total that omits drying is not a saving in Houston humidity.
Nearby cities
These are the only other cities in this batch.
How our referral works in Houston
Step 1. Describe the room, the size, and any leak, rain, or flood history. Step 2. We match the request to a local provider that offers the service. Step 3. The provider contacts you to discuss the visit, scope, and price. Step 4. You decide. Ask about drying, humidity control, and the water source.
Common questions
Does Houston humidity alone cause mold?
Humidity raises risk, but mold still needs a damp surface to grow. High outdoor humidity, poor ventilation, and condensation can keep surfaces damp. A leak or seepage makes the risk much higher. A provider should measure indoor humidity and check for leaks, rather than blaming humidity alone for a specific spot.
What should I do after flooding in Houston?
First, handle safety and active water. Do not enter a flooded area with electrical hazards or sewage. Dry wet materials quickly if it is safe, ideally within 24 to 48 hours, following EPA guidance. Then request an inspection referral. A provider can check walls, floors, and hidden cavities that look dry on the surface.
Do I need a permit for mold repair in Houston?
It depends on the repair. The Houston Permitting Center provides a centralized location for the issuance of a majority of City of Houston permits and licenses, including building permits. Surface cleaning alone usually needs no such permit. Ask your provider which parts need a permit, and check the current permit page before work starts.
Which Houston areas are covered by this page?
This page covers the City of Houston only, including the Heights, Montrose, River Oaks, EaDo, and the Energy Corridor areas listed below. Suburbs outside Houston, such as Katy or The Woodlands, are separate places with their own providers. Ask the provider to confirm it serves your exact neighborhood and ZIP code.