Mold Inspection in Houston, TX

When an inspection is worth the money

If you can see a small patch on a bathroom ceiling and you know the cause, you probably do not need one; EPA says areas under about 10 square feet are usually a homeowner job. An inspection earns its fee when the smell is there but the mold is not, when water got behind walls or under flooring, when you are buying or selling, or when a remediation job is coming and Texas rules call for a written protocol anyway.

What the inspector checks in a typical Houston house

• The AC system. With the air conditioner running most of the year, attic air handlers, drain pans, condensate lines and supply vents sweat. Expect the inspector to open the return and look at the coil area.
• Exterior walls and baseboards. On slab-on-grade homes, water from a heavy storm or a flooded street wicks up drywall from the floor. A moisture meter along the baseboards tells more than eyes alone.
• The attic. Roof leaks, poorly vented bath fans and ducts that drip condensation onto insulation.
• Under the house, if there is one. Older pier-and-beam homes in some neighborhoods have crawl spaces that stay damp on clay soil that drains slowly.
• Windows, plumbing walls and the water heater closet.

Testing is not automatic

EPA says that when mold is visible, sampling is usually unnecessary, and there are no federal limits for mold spores to compare results against. A careful inspector explains why a sample would change the plan before charging for one. Surface or air samples make more sense for checking whether an area was cleaned properly.

What you should get in writing

If remediation is needed, the mold assessment consultant writes a protocol listing the rooms involved, how much material comes out, containment, protective gear and the clearance criteria. Texas law requires this before work starts, and the same consultant later checks the finished job. Because the assessor cannot be the remediator on the same project, an inspector who pushes you to hire their own crew is a warning sign.

Cost

Angi's Houston cost data reports mold inspection and testing averaging $453, with a typical range of $355 to $563 and a low-to-high spread of $245 to $845. National ranges from HomeGuide (2026) run $300 to $650 for an average-sized home, up to $1,000 for a large home with widespread mold. Square footage, attic access and the number of samples drive the price.

Renters

The Houston Health Department handles indoor air complaints in apartments and hotels but does not inspect or test for mold; it refers those to TDLR. Apartment habitability problems such as water leaks can be reported through Houston 311.