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How Much Does It Cost To Remove Mold & Toxic Materials?

Most homeowners spend between $518 to $1,103 nationally.
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Mold infestation is more than a cosmetic issue. These black spots of fungus eat away buildings and cause a range of health problems in susceptible individuals. If you discover mold inside your house, act immediately to prevent serious damage to your health and property. This cost guide details what it costs to hire a professional to remove and remediate the mold problem.

National Test or Remove Mold & Toxic Material Costs

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Median Cost


Minimum Cost


Maximum Cost
Average Range:


National Average Cost $1,097
Minimum Cost $55
Maximum Cost $4,000
Average Range $518 to $1,103
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How do we get this data? This info is based on 5265 cost profiles, as reported by ImproveNet members.

Table of Contents

  1. Mold Removal Cost
  2. Mold Remediation Cost Factors
  3. What Causes Mold?
  4. Health Problems Caused By Mold & Toxic Materials
  5. Mold Testing Cost
  6. Mold Removal
  7. DIY Or Hire A Pro?
  8. Mold Prevention Tips
  9. Find A Pro

Mold Removal Cost

The cost to remove mold varies greatly from building to building, but most homeowners pay between $1,111 and $3,211. A minor infestation costs as little as $400 for a professional to remediate, and a major problem costs as much as $10,000 or more. In some cases, you can eliminate early stages of a mold infestation with a commercial fungicide and cleaning supplies.

Mold Remediation Cost Factors

The greatest factor in the cost of mold remediation is the degree of infestation in the building. If you notice mold growth in the early stages and it covers less than 100sf, you may be able to clean the mold without professional assistance, which lowers the cost. However, untreated mold can eat away drywall, lumber, subflooring and even the home's siding. When this happens, the remediation requires removing the damaged material. This increases the cost of the project due to time and material it takes to contain and remove the mold and rebuild damaged sections.

Mold Removal Cost

What Causes Mold?

Mold occurs naturally outdoors, where it serves an important purpose: breaking down dead organic material. It reproduces through spores that travel through the air until they find a wet surface where they can grow. Much like termites, mold can weaken wood and undermine the structural integrity of a home. Inside a house, mold grows especially well on drywall, window frames, carpet, ceramic tile and insulation material located in dark, damp spaces with poor ventilation. Common sites for mold infestation include:

  • Basement floors and walls
  • Showers
  • Siding
  • Floors and walls near air conditioners and heaters
  • Windows

Health Problems Caused By Mold & Toxic Materials

Although mold occurs naturally, it poses a safety hazard and can cause problems for some people. Molds produce allergens that worsen air quality and aggravate certain health conditions like asthma. However, even people who don't suffer from asthma can show signs of an allergic reaction to the mold spores, including sneezing, runny noses, irritated eyes and skin rashes. In some people, the symptoms show up immediately, but others react later. Some molds also release mycotoxins into the air, which can increase the odds of developing certain types of cancer. For this reason, homeowners who suspect they have mold in their homes need to test immediately and take action right away.

Mold Testing Cost

If you suspect a mold problem, you can hire an industrial hygienist to test the home for mold and recommend a course of action to remove it. These professionals charge between $150 and $3,000, and the average cost of a mold test is between $300 and $500. Some mold-remediation companies offer this service free of charge, but they may require you to use their remediation services in exchange for the complimentary service.

Mold Remediation Cost Factors

Mold Removal

Mold remediation specialists have two goals: eliminate the mold in the house and prevent it from spreading. They start the process by inspecting and evaluating the extent of the mold damage. This helps them calculate how much time they need to allocate for the job and determine the best cleaning method for the project.

The first step is to contain the mold. Specialists isolate the damaged area by sealing it with plastic sheeting so the spores cannot travel to the rest of the house. If the test detects significant amounts of mold, the specialist may use an exhaust fan with a HEPA filter to create negative pressure that fills the room with clean air and diverts spore-filled air outside.

After containing the mold, the technicians start the cleaning process. The first step is to remove any standing water on the floor or in the carpet using a wet vacuum. They wipe away visible mold on non-porous surfaces using an antimicrobial chemical and physically remove damaged porous surfaces such as drywall, wooden window sills, baseboards and moldings. In some cases, the air conditioning ducts require additional cleaning.

Finally, the technicians remove mold-infested items from the room, being careful to avoid dispersing spores in the house. They finish the room by repairing the walls and floors. Some mold remediation companies also offer construction services, which include installing new drywall, replacing the baseboards and molding with new pieces and new flooring.

DIY Or Hire A Pro?

Although it's possible for homeowners to clean minor mold problems, most should let professionals tackle the job. They have the necessary equipment and skill to protect themselves as they contain and remove mold to make the home safer. This includes gloves designed for use with the cleaning solution, face masks and protective clothing. Professionals also know how to dispose of damaged materials.

Mold Testing Cost

Mold Prevention Tips

The key to preventing a mold infestation is eliminating places for it to grow. This means controlling moisture inside the building by doing the following:

  • Repairing leaks in pipes, appliances and air conditioners as soon as possible and cleaning water spills immediately
  • Cleaning and repairing roof gutters
  • Preventing water buildup around the building's foundation by sloping the ground away from the structure
  • Lowering the humidity inside the building and keeping it below 60% by venting appliances outside, running air conditioners or dehumidifiers inside and using exhaust fans while showering or cooking
  • Keeping plants from touching the side of the house and removing pests
  • Changing air conditioner filters regularly
  • Investigating sources of condensation on windows, walls or pipes and repairing problems
  • Reducing condensation buildup by increasing ventilation or air movement, insulating pipes and increasing the air temperature

Find A Pro

Don't let mold take over your home. If you suspect a mold problem or know you have one, contact a mold professional who can eliminate it immediately. Use ImproveNet's lead generator to find a mold remediation specialist in your area and keep your home and yourself healthy.

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