The cost of a mold inspection might seem high, but it’s one of the best investments you can make for your health and home. Read on to learn cost-saving tips.
How Much Does Mold Remediation Cost in St. Louis? [2025 Data]
Normal Range: $1,231 - $3,492
Mold remediation costs in St. Louis cost $2,341 on average, but it can cost between $1,231 and $3,492, depending on location, type, and size of infestation.
How we get this data
Vladimir Nadtochiy / 500px / 500Px Plus / Getty Images
Vladimir Nadtochiy / 500px / 500Px Plus / Getty Images
Cost Insights
The type of mold, location, and size of infestation are the main factors that determine what mold remediation will cost in St. Louis.
The humid climate in St. Louis makes homes susceptible to mold growth, warranting additional preventative measures.
Mold infestations can decrease your home's value by 20% to 37%.
The cost of living in St. Louis is lower than the national average, making it more affordable for homeowners to pay for unexpected issues like mold remediation. The average mold remediation cost in St. Louis is $2,341, but it can range from $1,231 to $3,492 or more. The type of mold and its location are the main factors that impact the price of a professional mold remediation.
Mold Remediation Cost Factors
Mold remediation can cost as low as $600 for a small infestation that’s in an easy-to-access location, but it can be as much as $5,000 for more severe cases. Let’s dig into the cost factors so you can budget accordingly:
Mold Location
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.
| Location | Average Remediation Cost |
|---|---|
| Attic | $1,000–$4,000 |
| Basement | $500–$3,000 |
| Crawl space | $500–$2,000 |
| Wall | $1,000–$20,000 |
| HVAC systems | $3,000–$10,000 |
| Bathroom | $500–$1,000 |
| Whole house | $10,000–$30,000 |
Mold Infestation Size
Most mold removal professionals charge $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.
Mold Inspections and Tests
Mold inspection costs between $300 and $1,075. Mold testing is key to determining whether you have the presence of mold in your home, plus the extent of the infestation. You’ll need to hire a mold inspector to test surface samples in your home before moving forward with remediation.
Mold Type
Regardless of how it affects remediation costs, you need to know which type of mold you have in your home for your safety. That said, if a mold test reveals the presence of black mold, your mold remediation pro will likely charge more to remove it based on the additional cost of protective equipment.
| Type of Mold | Description |
|---|---|
| Alternaria | A common mold found outside in spring and summer, it primarily attacks plants. |
| Aspergillus | White fuzz that turns black over time, but it can also be brown, yellow, and green. It can cause respiratory illness and requires immediate remediation. |
| Aureobasidium | Grows on painted surfaces and behind wallpaper. It’s often pink and causes allergies. |
| Chaetomium | Extremely toxic and can cause brain infections and various cancers. A white fuzz that turns to blue or green. Requires immediate professional removal. |
| Cladosporium | Commonly found in basements and HVAC systems. It can cause mild allergy symptoms. |
| Fusarium | One of the most toxic molds; requires professional removal once discovered. Often caused by water leaks, it is commonly found in walls and floors. |
| Penicillium | Blue-green and grows in areas of elevated moisture where water damage has occurred. It can be very dangerous. |
| Serpula lacrymans | Causes severe damage to wood and spreads fast. Unfortunately, this mold is usually found after it has spread widely. |
| Stachybotrys chartarum (black mold) | Extremely dangerous, not to mention fast-spreading. Requires immediate removal by a professional. |
| Trichoderma | Grows rapidly in wood, plants, and soil. Commonly found in HVAC systems and not as widely discovered as others in this list. |
| Ulocladium | A dark-colored mold found near windows and in kitchens and basements. Looks like black mold, but it isn’t as toxic to humans. Nevertheless, it still requires removal. |
Damage Caused by Mold
If left untreated, mold can damage your drywall, carpeting, and flooring. Replacing or repairing your walls or floors will add costs to the removal.
Here are some cost estimates for different types of mold damage repairs in St Louis, MO:
| Repair Type | Average Cost |
|---|---|
| Drywall | $150–$1,600 |
| Carpet | $80–$400 |
| Hardwood Flooring | $330–$2,600 |
Mold Prevention
After a mold remediation crew handles the removal and cleanup, you’ll need to consider what measures to take to ensure it doesn’t come back. DIY mold prevention steps include:
Drying standing water immediately
Improve kitchen and bathroom ventilation
Use cleaning products that target mold growth
Choose mold-resistant materials
However, some preventative projects require hiring additional pros. For example, you’ll need to hire a local plumber to repair interior and exterior leaks or improve your drainage system, while a local HVAC professional is necessary to replace venting or install a whole-home dehumidifier. Consult your mold remediation pro for recommendations for additional pros.
Mold Remediation Pro Costs
The price you will pay to hire a mold remediation pro in St. Louis depends on the location, mold type, and severity of infestation. It can be as low as $600 to $5,000 or more for extreme infestations. If your entire house is infested, it can cost between $10,000 to $30,000 to eradicate the mold.
However, if you notice signs of mold in your home, contact a mold remediation pro immediately because it can rapidly spread to other areas if left untreated.
Additional Pros to Consider Hiring
Once the mold remediation crew is done, you’re likely to be left with several materials to replace, including drywall, carpet, and wood. Expect to arrange repair work with an experienced contractor to get your home looking its best.
Hire a drywall contractor to replace drywall: $1,000–$3,200
Hire a carpet installer to replace carpet: $3–$11 per square foot
Hire a plumber to fix leaks: $45–$200 per hour
Does Mold Remediation Increase Home Value?
Mold remediation is vital to prevent a drastic decline in your home value. In fact, the resale value of homes that have mold drops by 20% to 37%, and over half of potential buyers will not consider purchasing a house that has a mold infestation. The humid climate in St. Louis makes mold a common problem in homes around the city.
Hiring a professional to remove mold from your home will prevent its value from dropping and show potential buyers that it is no longer a risk to their health or a threat to further property damage.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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