Average Cost of Mold Testing and Inspections

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Mold testing is something that should be done when you suspect there is mold growth in your home or commercial building.

Typically, homeowners can expect to pay around $350 to $700 to have a professional inspector test their homes. However, more extensive testing can cost up to $1,000 to $1,500 or more.

These costs can go even higher when there may be extensive travel involved by the inspector to inspect a property or there is a lawsuit and attorneys involved, which may require a battery of various tests to be taken.

I have seen some inspection companies charge their clients thousands of dollars. One inspector regularly charges $4,000 to $6,000 for testing.

In my professional opinion, he is preying on vulnerable people and is ripping them off.

Mold Testing Cost Factors

The cost of mold testing depends on several factors:

Square footage

The larger the area that needs to be tested for mold, the more it will cost. A large area means more materials will be used in setting up containment and taking samples.

Types and quantity of samples taken

Mold inspections can take several types of samples including dust, soil, bulk material, swab, tape, and air quality samples. The more samples, the higher the cost.

If you’re having a mold inspection done, it should include air and surface samples.

Air quality test:

This test measures environmental factors like humidity, airborne spores, and carbon dioxide levels in your home. Air quality tests usually cost around $100-150 for each sample, depending on how many tests need to be done in your home.

Air samples are taken from different rooms in your house and compared with outdoor levels.

Air quality tests will determine if the air in your home contains elevated levels of mold, as well as identify what type(s) it is.

These tests have a sample collection component, where an inspector takes an air sample from inside your home and another from outside to compare.

Costs are higher for this type of testing because it requires specialized equipment.

This test is most recommended for people who may have hidden mold, have health concerns, or have experienced water damage in their homes.

Surface Swab or Tape Test:

Surface tests can determine the presence of mold on surfaces such as walls, floors or baseboards.

They are recommended if you can see visible mold.

This is done via a swab or tape sample taken from different parts of a surface in your home that later gets sent to a lab for analysis.

Lab Results

Labs typically charge $25 to $50 or more to analyze each standard (air or surface) sample with a 24-48 hour turn-around time. For same-day results, the fee can be $100 or more.

The EPA recommends that you use an accredited laboratory for mold testing. These labs are independent, so they provide impartial results.

In addition, they are more likely to follow proper testing protocols than some less reputable labs.

Why should you test?

Mold can be dangerous if inhaled.

It can be toxic and cause health problems and damage the structure of your home, so you should do what is necessary to remove it before it affects your health and property.

The most common starting point for treating a mold infestation is to have a mold inspection or mold test performed to determine the extent of the contamination.

It will also determine what type of mold is present in your house, whether it’s a toxic variety, and where the mold is growing.

An inspection generally involves testing and analysis by a certified professional who can then offer advice on the types and levels of mold present and how to proceed with remediation.

The cost of standard mold testing depends on the company, the size of your home, as well as the type and quality of testing required.

What does a professional inspector do?

A mold inspector will inspect your home for visible signs of water damage and mold.

They may take samples inside your walls, in your air ducts, and in other areas where you or they suspect there is mold.

They send these samples to a certified laboratory to find out what type of mold is growing and how much of it is present.

Inspection Tools

To get the most accurate results, good inspectors also use moisture meters and infrared cameras.

Moisture meters penetrate through drywall and other materials to measure moisture inside walls or floors that indicate hidden leaks from plumbing or roofs.

Infrared cameras detect temperature changes on surfaces where water may be hiding underneath the surface.

This information helps determine the severity of the issue and whether or not it poses a health risk.


Mold testing and remediation are important aspects of maintaining a healthy home environment.

Mold spores are everywhere, so an indoor level higher than outdoors means there’s likely mold growing somewhere in your home.

Mold-related health issues, such as asthma and allergies are often made worse by exposure to mold spores.

These health problems can become more severe if left untreated, so it’s important to get mold testing done as soon as possible after discovering a problem.


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