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Verified Remediation

Verified professionals · Washington

Mold Remediation in Washington

413 verified professionals across 84 cities

This page lists the 413 mold professionals we have identity-checked across 84 Washington cities. We don't hold Washington license records, so each listing shows only the checks we could complete.

Use it to compare companies near you, see what a typical job costs in the state, and know what to ask a contractor for before you hire.

Every listing identity-checked
Washington Market Report
413

Providers Listed

Across 84 cities

1

Insurance Verified

Where a company supplied a certificate

$1,223 – $3,757

Typical Project Range

Nationwide, per HomeAdvisor

Is it licensed here?

Is mold remediation licensed in Washington?

No. Washington does not license or certify mold remediation companies or mold inspectors, and none of the state's contractor specialty categories names mold. Contractors must register with the Department of Labor and Industries; the only exemption based on job size is for casual work under $500.

Whatever the state requires, a mold-specific certification from an industry body is worth asking for. Examples include the IICRC's course-based Applied Microbial Remediation Technician (AMRT) and its experience-based Mold Remediation Specialist (MRS), and the ACAC's Council-certified Microbial Remediator (CMR). Each requires an exam, and each can be checked with the body that issued it. These are held by individuals, not companies, so ask who on your job holds one.

Insurance is the other half. Ask for a certificate of insurance that names general liability coverage, and call the carrier on the certificate to confirm it is current. Then get the job in writing before anyone starts: what will be contained, what will be cleaned or removed, who will fix the moisture source, and how the finished work will be checked and documented.

Mold remediation license requirements by stateHow to verify a mold companyMold certifications explainedWho should check the work: assessor vs. remediator

Consumer Warning

Washington has no state license, registration or certification for mold remediation. This makes verification critical. Anyone can buy a truck and call themselves a "Mold Expert." Every listing here is identity-checked, and we show IICRC certifications and insurance only where a company has supplied them for verification, so you can see what has actually been checked before you call.

What to ask a mold company for in Washington

  • A mold-specific certification held by the person who will run your job (IICRC AMRT or MRS, or ACAC CMR), checked with the issuer, not just a general contractor registration
  • A certificate of insurance showing general liability, confirmed with the carrier
  • A written scope: containment, what gets cleaned or removed, and who will fix the moisture source
  • How the finished work will be checked and documented, with an independent check where the job calls for one
  • Recent reviews under the same business name and address that appear on the quote

Top-rated companies

Top-rated mold remediation companies in Washington

Ordered by verification tier, then by a review score that weighs volume and rating together, so a 4.8 from two hundred reviews outranks a 5.0 from three. Each card shows only the checks we could complete.

See every listed professional
  1. Clinical GradeHighest verification tier
    Total Dry Restoration logo

    Total Dry Restoration

    Testing and remediation · Burien, WA

    What they do
    Testing and remediation
    Insurance
    Certificate verified
    Google rating
    5.0 32 reviews

    Offers free estimates, the company says

    View profileContact Specialist

What a typical job costs

What mold remediation costs in Washington

$1,223 – $3,757typical job, nationwide

Source: HomeAdvisor, 7,952 reported project costs, June 2026

We don't have a figure specific to Washington. This is the national range. A single contained problem, like one wall or a bathroom ceiling, often comes in under it; whole-basement or post-flood work runs over it. If you get an independent assessment before the work, which we recommend, it is priced separately from the remediation, and so is an independent check after it where the job calls for one. Both should be.

See the detailed cost guide

Size it to your own job

Two questions give the range for a job like yours, and where each number comes from.

How much
A small patch, one area or room, several areas, or throughout the home
Where
On a surface I can see, inside walls or under floors, or in the AC or ducts
Then
Your ZIP finds verified pros near you

What comes back: the remediation range with its source, the assessor's visit and a clearance test, which not every job needs, as their own lines, and a total.

Estimate your cost

Free to use. An estimate, not a quote.

Cities by county

Browse Washington cities by county

Every Washington city with a listed professional, grouped by county. Pick a city to see its companies, or use the full list if your town is not here.

King County

102 pros · 17 cities

Snohomish County

66 pros · 12 cities

Pierce County

44 pros · 9 cities

Spokane County

36 pros · 4 cities

Clark County

29 pros · 3 cities

Thurston County

20 pros · 3 cities

Benton County

18 pros · 2 cities

Yakima County

17 pros · 4 cities

Chelan County

16 pros · 1 city

Kitsap County

15 pros · 7 cities

Whatcom County

11 pros · 3 cities

Skagit County

7 pros · 3 cities

Cowlitz County

5 pros · 3 cities

Grant County

5 pros · 2 cities

Franklin County

4 pros · 1 city

Walla Walla County

4 pros · 1 city

Kittitas County

3 pros · 1 city

Whitman County

3 pros · 1 city

Asotin County

2 pros · 1 city

Grays Harbor County

1 pro · 1 city

Stevens County

1 pro · 1 city

Other areas

4 pros · 4 cities

Every listed mold professional in Washington, by city

Questions people ask

Common questions about mold remediation in Washington

Answered without a sales pitch.

  • How much does mold remediation cost in Washington?
    Nationally, a typical mold remediation job runs $1,223 to $3,757, from 7,952 project costs reported to HomeAdvisor. We don't have a figure specific to Washington. The price moves with how much material has to come out, whether the moisture source is fixed in the same job, and whether containment and air filtration are needed. Get the scope in writing and ask how the finished work will be checked. If an independent check after the work is planned, ask what it will cost, because it is priced separately from the remediation.
  • Does Washington require a license to do mold remediation?
    No. Washington does not license or certify mold remediation companies or mold inspectors, and none of the state's contractor specialty categories names mold. Contractors must register with the Department of Labor and Industries; the only exemption based on job size is for casual work under $500. Whatever the state requires, a mold-specific industry certification is worth asking for, such as IICRC AMRT or MRS, or ACAC CMR, each of which you can check with the body that issued it.
  • Can you sell a house with mold in Washington?
    Selling is legal. What gets sellers in trouble is hiding a problem they knew about: in most states a known mold or water problem is a material defect that has to be disclosed, and a buyer's inspector tends to find it anyway. The two clean routes are to remediate before listing and keep the records that document the finished work, including any verification report, or to disclose it and price the work in.
  • How do I check a mold company in Washington?
    Ask for three things and check each one yourself: a mold certification held by the person who will run your job, which you can find on the IICRC or ACAC public register, a certificate of insurance you confirm with the carrier, and a written scope of work. Then look the business up under the exact name and address on the quote. Our listings show which of those checks we could complete for each company.
  • Is a free mold inspection a red flag?
    Not on its own, but know what it is. A remediator inspecting your home before it quotes is normal, and a free visit is a fair way to get an estimate. It is not an independent assessment, though: a company that also sells remediation has a potential financial stake in what it finds. Our recommendation is to pay for an assessment from a company that will not do the remediation, which takes that incentive out of the diagnosis, and to have an independent check of the finished work where the job calls for one. That holds with or without a state license behind it.
  • What can renters in Washington do about mold?
    Report the moisture problem to the landlord in writing, with photos and dates, and ask for the leak or ventilation fault to be fixed rather than the stain painted over. If nothing happens, the local building or code enforcement office can inspect for the underlying water problem even where there is no mold rule to enforce. Keep every message; a tenant remedy or a health complaint will rest on that record.

Helpful Guides

Actively Verified

About Mold Remediation in Washington

Washington has no state license, registration or certification for mold remediation. Every listing is identity-checked, with state licenses, insurance, and reviews verified where available.

See all Washington providersBrowse mold removal companies near youBrowse all states