It is common to find mold in buildings, especially in areas with high moisture content. Mold sprouts and spreads quickly and can damage homes and cause health problems. That’s why it is essential to know how much mold removal costs so that you can deal with the problem before it gets worse.

Removing mold from drywall costs $15 to $30 per square foot. Depending on the extent of the mold damage, you may need to consider replacing drywall in some sections.

The price can vary depending on multiple factors, including whether your drywall needs a repair or a total replacement. Other price considerations may include other materials, such as any leaking pipes that need to be replaced.

Cost to remove mold from drywall

On average, mold remediation companies charge somewhere between $10 and $25 per square foot. For example, if the mold growth is across a 100-square-foot room, you can expect to spend between $1,500 and $ 3,150.

Normally, mold remediation companies will charge by square feet for small mold infestations. However, if the mold infestation covers a large space, they may need to charge you for the entire space.

For reference, below are the estimates for mold remediation per area size:

Mold Removal Cost per Square Foot infographics
DescriptionAverage cost range (labor included)
50 square feet area$500 to $1,250
100 square feet area$1,000 to $2,500
150 square feet area$1,500 to $3,750
200 square feet area$2,000 to $5,000
300 square feet area$3,000 to $7,500

Should I replace moldy drywall?

This will depend on the extent of the damage. Regular drywall does not like moisture, so if it has been wet for a longer period of time it may have warped or be beyond repair.

It is cheaper to kill mold than replace drywall, once the cause of the mold has been remedied, it might be worth replacing affected sections and starting fresh.

How to kill mold behind drywall

This is tricky as you need to access the mold directly to kill it.

I suggest first to drill a small hold into drywall where you suspect mold may be. Use a mold detector to test the air behind the drywall. If it comes back positive, you can spray a bleach: water mix (1:3) through the hole to kill the mold then fill it in.

You need to bear in mind that there are vertical battens and horizontal studs that make up the internal structure of the wall and separate it into sections. You will need to drill a hole in each of these sections and apply the mold-killing mix.

Factors that affect the cost of mold remediation

There are various factors and considerations that can influence the total cost of your mold remediation. While mold remediation can fairly get expensive, below are some of the factors that you can expect to influence the total cost of your project.

Type of mold

Mold problems and the ways to solve them can vary depending on the type of mold that you are dealing with.

Non-toxic molds will cost you less compared to toxic forms of mold. This is because mold removal companies will need more safety equipment and chemicals when dealing with harmful molds.

Size of area

When dealing with mold removal services, the size of the mold growth plays a big role in the total cost. The bigger the area, the bigger you’ll expect to pay.

Normally, mold does not creep through an entire room. With that, mold removal companies typically charge for each square foot of the affected area, which can be convenient when the mold is only minimal.

However, for larger areas that require drywall, the price might get high.