Most professional mold remediation jobs cost a few thousand dollars. National cost guides put the typical range at about $1,100 to $3,400, with an average around $2,400. The full range runs from under $1,000 for a small patch to $30,000 or more for a whole house after a major water loss. The size of the affected area and how hard it is to reach explain most of that difference.
This guide breaks down typical prices by size and location, shows how per-square-foot pricing works, and explains what is usually in a quote and what is billed separately.
Typical cost by size of the affected area
| Affected area | Typical cost | Examples |
|---|---|---|
| Small, 10 to 100 sq ft | $500 to $1,500 | A section of drywall, a closet corner, a spot on a ceiling |
| Medium, 100 to 300 sq ft | $1,500 to $6,000 | A full wall, several small areas, part of an attic or basement |
| Large, 300 to 1,000 sq ft | $6,000 to $15,000 | An entire room, attic, or basement |
| Whole home, over 1,000 sq ft | $15,000 to $30,000 | Widespread growth after a flood or hurricane |
Figures are national ranges from HomeGuide's 2026 cost data. The affected area means the contaminated surface, not the size of your house.
Cost by location in the home
| Location | Typical cost |
|---|---|
| Bathroom | $500 to $2,000 |
| Crawl space | $1,500 to $4,000 |
| Attic, part | $1,500 to $6,000 |
| Attic, whole | $6,000 to $15,000 |
| Basement, part | $1,500 to $6,000 |
| Basement, whole | $6,000 to $15,000 |
| Air conditioning system and ducts | $2,000 to $10,000 |
Bathrooms tend to cost the least because the growth is usually on the surface and easy to reach. Work on the air conditioning system costs more because mold in the air handler or ducts can spread through the house, and the system has to be cleaned or parts replaced. According to Angi, removing mold from a small section of drywall runs about $300 to $825.
How per-square-foot pricing works
Many contractors quote about $15 to $30 per square foot of affected surface. To get a rough idea of your own cost:
- Measure the visible growth, then add a margin, because mold on the back of drywall often covers more area than the stain on the front.
- Multiply by $15 for easy, surface-level work, and by $30 for jobs that involve wall cavities, crawl spaces, or ductwork.
- Add repairs: new drywall, insulation, paint, or flooring after the moldy material comes out.
For example, 60 square feet of mold on drywall would come to about $900 to $1,800 for remediation, before the wall is rebuilt. Small jobs often carry a minimum charge, so a 5-square-foot patch rarely costs a tenth of that.
Treat this math as a starting point. An on-site inspection with moisture readings is what turns it into a real number.
What drives the price up or down
- Size of the affected area. The biggest single factor.
- Access. Attics, crawl spaces, and wall cavities take more time and more protective equipment.
- Material. Porous materials like drywall, insulation, and carpet usually have to be removed. Hard surfaces can often be cleaned in place.
- Containment. Larger jobs need plastic barriers, negative air pressure, and HEPA air filtration to keep spores out of the rest of the house.
- Air conditioning involvement. Mold in ducts or the air handler adds cost quickly.
- Rebuild. Drywall, paint, flooring, and cabinets are often priced separately.
- Testing. An inspection before the job and clearance testing afterward add to the total.
- Local labor rates and demand. Prices tend to rise in busy periods, such as the months after a hurricane or a regional flood.
What a remediation quote usually includes
Most quotes cover:
- Setting up containment and protecting the rest of the home
- HEPA air filtration during the work
- Removing and bagging moldy porous materials
- HEPA vacuuming and cleaning the remaining surfaces
- Drying the area
- Disposal of the removed materials
Often billed separately, or done by someone else:
- Fixing the water source. A plumber or roofer does this, and it has to happen or the mold will return.
- Rebuilding. HomeGuide puts drywall replacement at about $1.50 to $3.50 per square foot and painting at about $1 to $3 per square foot.
- Clearance testing. In states that separate assessment and removal, such as Florida and Texas, a different company does it.
- Cleaning or replacing belongings. Contents are usually a separate line item.
When comparing quotes, line them up item by item. A low bid that skips containment or leaves wet drywall in place is not a like-for-like price.
Does black mold cost more to remove?
The color of mold does not identify its species, and the removal method depends on how much material is affected and what it is, not on color. Stachybotrys, the mold usually meant by black mold, tends to grow on materials that have stayed wet for a long time, such as the paper facing of drywall after a slow leak. Those jobs often involve removing more material, and that, rather than the color, is usually what raises the price. Question any quote that adds a surcharge only because the mold is dark.
How long remediation takes
Small and medium jobs usually take one to three days. Large or severe cases can take up to a week, and rebuilding adds more time. You may be able to stay home during a small, contained job; for large jobs, most companies recommend staying elsewhere until the work is done.
Will insurance pay for it?
Only if the mold resulted from a sudden, covered event such as a burst pipe, and usually only up to a separate mold limit. In many policies that limit is a few thousand dollars; in Florida, $10,000 is common. Mold from slow leaks, humidity, or flooding is usually excluded from homeowners coverage. Read does homeowners insurance cover mold before you file.
How to keep the cost down without cutting corners
- Act fast. The EPA advises drying water-damaged areas within 24 to 48 hours to prevent mold growth. A leak caught early can mean a small job instead of a large one.
- Fix the source first, or at the same time. Paying for removal without stopping the water means paying twice.
- Get two or three written quotes for the same scope, so you are comparing the same work.
- Consider an independent inspection for large jobs. A separate inspector can confirm the scope before you commit to a five-figure bid. See what a mold inspection involves.
- Do not pay in full up front. A deposit is normal; the balance is usually due when the work is finished.
- Handle small areas yourself only when it is safe. The EPA says homeowners can often clean areas smaller than about 10 square feet, wearing gloves, goggles, and an N-95 respirator, as long as the moisture problem is fixed.
Mold remediation costs in Florida
Florida's humidity and storm season keep mold work in steady demand. South Florida contractor price guides put small jobs of 10 to 50 square feet at about $500 to $1,500, jobs of 50 to 200 square feet at $2,000 to $4,000, and large or hidden growth at $5,000 to $10,000 or more. Prices tend to rise after hurricanes, when demand is high, and condo jobs that affect several units cost more.
Florida also requires a DBPR license for most remediation over about 10 square feet, and remediators must carry at least $1 million in liability coverage. City pages list local price ranges: see Miami, Tampa, Orlando, or the Florida state page.
Next step
If you own your home and want a price for your situation, call the number on this page to be connected with an independent local mold remediation company. Ask for a written scope of work so you can compare it with other quotes.