Mold Remediation Cost Calculator: what it costs in 2026
A typical job runs $1,223–$3,757, from 7,947 project costs reported to HomeAdvisor. Answer two questions to see the range for a job like yours, and where each number comes from.
Sourced ranges Mold remediation cost, national figures
How much of your home is affected?
A rough idea is fine. An assessor measures it on site.
Answer two questions and the range appears here, with where each number comes from.
- 1. How much of your home is affected
- 2. Where the mold is
Free to use. We never sell your information.
Four things change your quote.
No single number fits every home. Here's what a remediator is pricing when they walk your property.
How much is affected
A small bathroom patch and mold across several rooms are not the same job. The calculator shows the published range for each size of job.
What's behind the drywall
Mold inside walls or under floors usually means opening them, and rebuilding drywall or flooring is quoted separately from the remediation.
The AC or ducts
When the heating and cooling system is involved, the whole system has to be isolated and cleaned. HomeAdvisor prints $3,000–$10,000 for these jobs.
What the quote includes
Containment, removal, cleaning and a clearance test should each be a line. A lower total that leaves one out is not the same job.
Mold remediation cost per square foot (2026).
It's the price question homeowners ask most, and the one published data answers least. Here is what the per-foot numbers you'll see actually are.
$10–$25 per square foot
HomeAdvisor prints this rate, and most cost guides repeat it. None of them says how it was measured, or whether it counts the visible growth, the damaged material, or the whole room.
Fixed costs don't shrink
The assessment, containment, air scrubbers, disposal and the clearance test cost about the same for a small patch as for a bigger job. At $10–$25 a foot, a 10-square-foot patch would cost $100–$250; the lower half of pros' quotes on Thumbtack runs $592–$1,188.
Prices vary by region, but we found no source that publishes regional adjustments with a method, so the calculator shows national figures and names the source of each one.
For the range that fits your job, use the calculator above.
Estimates are only useful if the quote comes from someone real.
A range helps you plan. Before you hire, check the professional behind the quote. Here is what we check, and what each check means.
State license
We match licenses to state records where we hold them, and re-check the Florida and Texas state databases every day. Everywhere else, we verify the business's identity and location.
Insurance
When a provider supplies a certificate, we verify it and show its expiry date. Our top two tiers require verified insurance.
Google rating
See the Google rating alongside its review count. Our highest tier requires 4.0+ stars from at least five reviews. We do not verify individual reviews.
Every listing is identity-checked, with state licenses, insurance, and reviews verified where available.
The company that tests shouldn't be the one that fixes it.
Some states limit doing both
Florida, Texas, Louisiana, New York and Oklahoma each limit it by law in different ways. Florida's rule covers 12 months and exempts certain certified contractors, New York's Department of Labor describes its rule as applying to the same individual, and Oklahoma's lets one company do both only when the inspection and removal together cost $200 or less and you agree. The assessor writes the scope. A different company does the work. That protects you from a conflict of interest: the person diagnosing the problem shouldn't be the one paid to “fix” it.
The Assessor
Inspects, tests, and writes the protocol. Paid for the diagnosis, not the cleanup.
The Remediator
Carries out the protocol the assessor wrote. Clearance testing afterwards should be done by a separate assessor.
Wherever you live, if the company that tests your home offers to do the remediation too, hire a different company for one of the two jobs.
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What mold remediation costs in 2026
A typical job, from 7,947 project costs reported to HomeAdvisor. HVAC and whole-home jobs cost more.
What changes your mold remediation quote
- How much of the home is affected
- Mold inside walls or floors
- Mold in the AC or ducts
- What the quote includes
Know these before you call.
Why one mold job costs under $1.2k and another over $10k
Small patch: pros quote $592–$1,188. Typical job: $1,223–$3,757. Whole home: $10,000–$30,000+.
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