Which states license mold remediation

Where a mold assessor or remediator needs a state license, where the assessment has to come from someone else, and where we found no state license at all.

Updated October 15, 202684 official sources

On this page4 sections

1The short answer
2Does the assessment have to come first?
3Small jobs
4The rules in each state

Most states don't license mold work. A few license the people or companies who test for mold (assessors) and the ones who remove it (remediators), and some of those keep the two jobs apart. Here's what each state's own pages say.

The short answer

A state mold license: the District of Columbia, Florida, Louisiana, New York and Texas. Tennessee licenses mold remediation as a classification of its contractor license.
A certification instead of a license: Connecticut, for home improvement contractors who do mold remediation, and New Hampshire, for paid residential mold assessments.
A law that isn't in effect yet: Illinois.
No state license found: every other state in the table below.

Does the assessment have to come first?

In New York and Texas, yes. New York licenses mold assessment and remediation contractors separately, a licensed assessor writes the remediation plan, and no licensee may do both the assessment and the remediation on the same property.^1-3 In Texas, one license holder can't do both on the same project, and remediation follows a protocol from a licensed mold assessment consultant.^4-5

Florida keeps the two jobs apart without requiring an assessment first: a company that assessed a building generally can't remediate it within the next 12 months, or the other way round.⁶

Small jobs

Some licenses start above a size or a price. New York's applies to jobs over 10 square feet,^7-8 Louisiana's to jobs of $7,500 or more,⁹ and Tennessee's to projects of $25,000 or more.¹⁰ For a home, the EPA says that if the moldy area is less than about 10 square feet, you can usually handle the cleanup yourself.¹¹

The rules in each state

State	What the state requires
Alabama	Alabama doesn't license mold remediation services, according to the Department of Public Health.^12-13
Arizona	We found no state license or registration for mold work in Arizona.¹⁴
Arkansas	Arkansas doesn't offer training or licensing for mold abatement contractors, according to the Department of Health.¹⁵
California	California has no training, licensing or certification requirement for mold assessors or remediators, according to the Department of Public Health.¹⁶
Colorado	We found no state license or registration for mold work in Colorado.¹⁷
Connecticut	Since October 1, 2026, a home improvement contractor in Connecticut who does mold remediation has to attest to a mold remediation certification when registering with the Department of Consumer Protection, and has to follow the ANSI/IICRC S520 standard.¹⁸
Delaware	We found no state license or registration for mold work in Delaware.^19-20
District of Columbia	The District licenses mold assessment and mold remediation professionals for residential work, through the Department of Energy and Environment.^21-22
Florida	Florida licenses mold assessors and mold remediators. A company that assessed a building generally can't remediate it within the next 12 months, or the other way round.^{6, 23-24}
Georgia	We found no state license or registration for mold work in Georgia.²⁵
Hawaii	We found no state license or registration for mold work in Hawaii. The Department of Health keeps a list of indoor air quality consultants, which it says isn't an endorsement.^26-27
Idaho	We found no state license or registration for mold work in Idaho.²⁸
Illinois	Illinois passed a mold remediation registration law, but it won't take effect until the Department of Public Health adopts its rules.²⁹
Indiana	Neither Indiana nor any federal agency licenses or certifies mold investigators or remediators, according to county health departments.^30-31
Iowa	We found no state license or registration for mold work in Iowa. A 2025 bill to set up a mold remediation registry (HF 731) was introduced and sent to committee, and went no further.^32-33
Kentucky	Kentucky doesn't license mold work. A 2010 law directs the Attorney General's office to set minimum standards for mold remediation companies.³⁴
Louisiana	Louisiana requires a mold remediation license from the State Licensing Board for Contractors for jobs of $7,500 or more.^{9, 35}
Maryland	Maryland doesn't license mold work. A licensing law passed in 2008 was never put into effect, for lack of funding, and ended in 2019.^36-37
Massachusetts	We found no state license or registration for mold work in Massachusetts.³⁸
Michigan	Michigan doesn't certify mold remediators or mold testing companies, according to the Department of Health and Human Services.³⁹
Minnesota	Minnesota doesn't license or certify mold investigators or remediators, according to the Department of Health.⁴⁰
Mississippi	We found no state license or registration for mold work in Mississippi.⁴¹
Missouri	Missouri doesn't certify mold testers, and the Department of Health and Senior Services says mold work isn't a regulated industry.⁴²
Montana	We found no state license or registration for mold work in Montana..^43-44
Nebraska	We found no state license or registration for mold work in Nebraska. Ask your city or county whether it licenses contractors.
Nevada	We found no state license or registration for mold work in Nevada. We read its contractor licensing law and rules.^45-46
New Hampshire	New Hampshire issues no mold license or registration, but anyone paid to do residential mold assessments must hold a national third-party mold assessment certification. Mold remediation contractors aren't covered.^47-49
New Jersey	New Jersey doesn't license or certify mold inspectors or mold remediation companies.^50-52
New Mexico	New Mexico doesn't license or register mold assessors or remediators, and the Department of Health says no state law or agency regulates mold.^53-54
New York	New York licenses mold assessors, remediation contractors and abatement workers through the Department of Labor for jobs over 10 square feet. A licensed assessor writes the remediation plan, and no licensee may do both the assessment and the remediation on the same property.^{1-3, 7-8}
North Carolina	North Carolina doesn't license or register mold assessors or remediators. The state health department points homeowners to trade groups and their certifications.^55-56
North Dakota	We found no state license or registration for mold work in North Dakota. Its contractor license comes in classes A to D by contract value, with no trade classes.⁵⁷
Ohio	We found no state license or registration for mold work in Ohio. Its construction industry license covers only HVAC, refrigeration, electrical, plumbing and hydronics contractors.⁵⁸
Oklahoma	Oklahoma doesn't license or register mold assessors or remediators, and the State Department of Health says it has no authority over mold complaints.^59-60
Oregon	We found no state license or registration for mold work in Oregon..^61-62
Pennsylvania	Pennsylvania doesn't license or register mold assessors or remediators, and the Department of Health says there are no state regulations about mold.⁶³
Rhode Island	We found no state license or registration for mold work in Rhode Island. We read its laws on licensed professions and on public health.^64-65
South Carolina	We found no state license or registration for mold work in South Carolina. Mold remediation isn't one of its contractor license classifications.^66-67
South Dakota	South Dakota doesn't license or register mold assessors or remediators, and the Department of Health says mold inspection and cleanup is the homeowner's job.^68-70
Tennessee	Tennessee licenses mold remediation as the S-F specialty classification of the contractor license, which the Board for Licensing Contractors requires for projects of $25,000 or more.^{10, 71-72}
Texas	Texas licenses mold assessors and mold remediation contractors and companies, and registers remediation workers, through TDLR. One license holder can't do both the assessment and the remediation on the same project.^{4-5, 73}
Utah	Utah doesn't license or register mold assessors or remediators, and its health department tells homeowners to check that a contractor has been trained in mold removal.⁷⁴
Vermont	Vermont doesn't license or certify mold cleanup, though contractors using pesticide products may need certification from the Agency of Agriculture, Food and Markets.⁷⁵
Virginia	Virginia doesn't license mold inspectors or remediators. Its mold licensing under the Board for Asbestos, Lead, and Home Inspectors was repealed in 2012.^76-78
Washington	Washington doesn't license or certify mold inspectors or remediation contractors, and the Department of Health says there are no certification requirements for mold or water damage restoration.⁷⁹
West Virginia	We found no state license or registration for mold work in West Virginia. A 2026 bill on mold was about a public awareness campaign.^80-81
Wisconsin	Wisconsin doesn't certify or license mold consultants or remediation contractors, and the Department of Health Services says neither it nor the federal government certifies them.⁸²
Wyoming	We found no state license or registration for mold work in Wyoming. We read its laws on licensed professions and on public health.^83-84

Alaska, Kansas and Maine aren't in the table. We couldn't load an official page on mold licensing for them, so we can't say either way. Where a state has no mold license, a city or county may still license contractors, and the rebuild after mold removal may need the state's contractor license. How to check a restoration or mold company's license links each state's lookups.

Mold licensing rules from state health departments, licensing boards and legislatures, checked October 2026.

Which states license mold remediation

The short answer

Does the assessment have to come first?

Small jobs

The rules in each state

Tell us what's happening

Sources (84)

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