How Much Does Mold Remediation Cost?

Kelly Weimert
Written by Kelly Weimert
Updated January 24, 2022
Basement with kitchen in new construction home
Photo: pics721 / Adobe Stock

Highlights

  • It typically costs $1,125 to $3,345 to remove mold.

  • The national average cost of mold remediation is $2,225.

  • Mold remediation costs vary considerably by where the growth is.

  • If you notice any signs of mold, you should call a professional mold inspection service.

It's fairly common to find mold in the home, particularly in humid regions and spaces with high moisture levels. Mold can sprout up on everything from interior insulation to window frames and flooring, causing damage, odor, and even health problems. Not to mention, it's quite the eyesore. 

If you discover any mold in your home, it's a good idea to remove it as soon as you can. Mold remediation typically costs $1,125 to $3,345, but the price varies depending on several factors, like location, square footage, and whether you hire a pro to do it.

How Much Does Mold Remediation Cost by Square Foot?

Most mold removal professionals charge around $10 to $25 per square foot. So, if you're removing mold from a 100-square-foot area, you can expect to pay around $1,000 to $2,500. But factors like where the growth is and the mold type can affect how much it costs to remove it. 

How Much Does Mold Remediation Cost by Location in the Home?

It costs more to remove mold from certain areas of your home than others. For instance, mold growth in hard-to-reach areas, like in your HVAC system or drywall, can require more time and materials to remove than mold in very accessible areas, driving up costs. 

Attic Mold Remediation Costs

Roof leaks can lead to attic mold since mold thrives in moist environments. It typically costs $1,000 to $4,000 to remove attic mold, depending on how easy it is to access your attic. However, if the roof leak is very large or has gone undetected for a considerable time, mold remediation can cost as much as $7,000

In addition to removing mold, you should repair the roof leak to prevent further mold growth. Roof repair costs generally range from $350 to $1,250.

Basement Mold Remediation Costs

Basements are another area that tends to experience moisture and mold growth. It usually costs around $500 to $3,000 to remove basement mold, but costs can be higher if the mold is behind wood paneling or finished walls. 

Basement mold growth often occurs due to foundation sealant problems, so addressing these can help prevent mold from infesting your home. The cost to seal the foundation ranges from $2,250 to $7,100.

Crawl Space Mold Remediation Costs

Crawl spaces are often damp and dark, making them prime targets for mold. However, they're also typically small, so mold remediation costs are often lower than in other areas, ranging from $500 to $2,000. Encapsulating your crawl space can help prevent future growth. Crawl space encapsulation costs range from $1,500 to $15,000

Wall Mold Remediation Costs

Removing mold from your walls can cost anywhere from $1,000 to $20,000 depending on whether you simply need to remove mold from the surface or must replace the wall and everything behind it due to mold damage. 

Mold that grows on drywall for a long time can destroy the drywall. Repairing drywall typically costs $300 to $825. Mold on wooden walls or concrete is more expensive to remove. Removing mold from wooden walls costs between $700 and $5,000, while concrete mold removal can range from $1,000 to $10,000 or more.

HVAC Mold Remediation Costs

HVAC systems require special cleaning to remove all airborne spores. The cost to remove mold from an HVAC system ranges from $3,000 to $10,000, depending on the type of system. 

For instance, it typically costs $1,500 to $5,000 to remove mold from a radiant heat system and $3,000 to $5,000 for furnace and air handler mold remediation. Removing mold from air conditioners usually costs around $6,000 to $10,000.

Bathroom Mold Remediation Costs

The moisture inherent in most bathrooms often attracts mold. Costs to remove it generally range from $500 to $1,000, but if there's mold behind your sink, tub, or walls, costs can reach $8,000 or more.

Air Duct Mold Remediation Costs

Like HVAC systems, air ducts often require special cleaning to ensure all airborne spores are removed. It typically costs $600 to $2,000 to remove mold from air ducts. You can schedule regular air duct cleanings to help prevent mold growth, which usually cost between $275 and $500

Whole-House Mold Remediation Costs

Sometimes, toxic spores impact an entire house. This removal can be costly at around $10,000 to $30,000, including removal and water damage repairs to prevent future issues. However, replacing upholstery, carpets, drywall, and more can add thousands to the final cost. 

How Much Does It Cost to Repair Mold Damage?

If mold is left untreated for too long, it can damage your drywall, carpeting, and flooring. Replacing or repairing your walls or floors will add costs to the removal. 

  • Drywall installation cost: $1,000–$2,900

  • Carpet installation cost: $775–$2,600

  • Flooring repair cost: $200–$550

How Much Does DIY Mold Remediation Cost?

The Environmental Protection Agency recommends only removing mold yourself if it covers less than 10 square feet. Otherwise, it's best to call a local mold removal service. That said, even if the mold looks like it only covers a small area, you should always call a pro to inspect it to ensure there isn't additional mold hiding behind walls or floors and to determine how harmful it is. Mold inspections typically cost $300 to $1,025. After the inspection, the pro can advise you on whether you need professional mold remediation services. 

The cost to remove mold yourself typically ranges from $50 to $300. For small projects, the only piece of equipment you should need is a wet vacuum to pull moisture away from the area, which you can rent for around $30 per day or buy for $80 to $200

To properly clean the area, you can purchase a pre-formulated mold remediation solution at the hardware store for around $10 to $75. However, very small mold removal projects usually only require water and detergent. Regardless of the solution you use, you should wear goggles, gloves, and an N95 respirator to protect yourself from the mold during the removal, all of which you can purchase for around $30 to $150 total. Use extreme caution and do your research before starting.

DIY Mold Removal Tips

  • Moisture precipitates spore growth, so repair all sources of moisture, like leaks, and dry everything completely during removal.

  • Use a mold remediation solution (or water and detergent for very small areas) to remove spores from hard surfaces.

  • Mold often causes irreparable damage to porous materials, like drywall and carpet, so you should typically replace them when they get moldy and install new ones.

  • Wear gloves, goggles, and an N95 respirator to protect yourself from airborne toxins during removal.

  • Scrub the affected area until there isn't any odor or visible signs of spores or moisture accumulation.

FAQs About Mold Remediation

What is mold?

Mold is a fungus that typically grows in warm, moist environments, which is why it's so often found in bathrooms, attics, and under sinks. It survives by digesting decaying organic materials, which makes it very helpful for removing dead plant matter around the world. However, if it starts eating away at your drywall, window frames, and flooring, it can harm your home and your health.

Why does mold grow in homes?

Mold can grow anywhere with high moisture levels and potential "food" sources, like drywall, flooring, and window frames. Roof leaks, flooding, plumbing leaks (a common problem new homeowners face), and high humidity are all moisture sources that can lead to mold growth, which is why it's important to address leaks and other water damage as soon as you can.

What are health problems caused by mold?

According to the EPA, mold allergies are common and can cause skin irritation, respiratory problems, headaches, and other allergic reactions. Mold allergies can also trigger asthma attacks in people with asthma. Additionally, some molds produce mycotoxins, which can lead to very serious conditions, like lung cancer. 

What signs indicate a mold problem?

If you suspect you have a mold problem, you should always call a mold inspection professional to determine the location and extent of the mold. They can recommend the best next steps. 

Signs that indicate a mold problem include:

  • Musty, earthy odor coming from a specific area

  • Warping, cracking, and peeling on the floors or walls

  • Leaks or water damage, especially in dark, warm spaces

  • Darkening around tile grout

  • Discoloration on the walls

  • Worsening allergy symptoms

  • Dry, itchy skin