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Verified Remediation

Verified professionals · California

Mold Remediation in California

1,031 verified professionals across 242 cities

California has no state license for mold remediation, so there is no registry to check a company against before you hire. This page lists the 1,031 mold professionals we have verified across 242 California cities, with the checks we could complete shown on each listing.

Use it to compare companies near you, see what a typical job costs in the state, and know what to ask a contractor for when the state has not set a standard for you.

Every listing identity-checked
California Market Report
1,031

Providers Listed

Across 242 cities

1

Insurance Verified

Where a company supplied a certificate

$1,500 – $5,500

Typical Project Range

Based on California market

Is it licensed here?

Is mold remediation licensed in California?

No. California does not license mold remediation companies and has no state certification program for them. Some companies will show a general contractor or home improvement registration instead. That is worth having, but it is a consumer protection basic, not a mold credential.

That leaves the checking to you. The closest thing to a standard is a mold-specific certification from an industry body: the IICRC's Applied Microbial Remediation Technician (AMRT) and the ACAC's Council-certified Microbial Remediator (CMR) both require training and an exam, and both can be looked up on the issuing body's public register.

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 removed, how the moisture source will be fixed, and who will check the result.

How to verify a mold companyMold certifications explainedWho should check the work: assessor vs. remediator

Consumer Warning

California does not require a state license 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 California

  • A mold-specific certification you can look up (IICRC AMRT or ACAC CMR), not just a general contractor registration
  • A certificate of insurance showing general liability, confirmed with the carrier
  • A written scope: containment, what gets removed, and how the moisture source is fixed
  • Post-remediation verification by someone other than the company that did the work
  • Recent reviews under the same business name and address that appear on the quote

Top-rated companies

Top-rated mold remediation companies in California

Ordered by verification tier, then by review strength, which 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

What a typical job costs

What mold remediation costs in California

$1,500 – $5,500typical California range

Source: Verified Remediation cost model, typical range

The middle half of California projects in our cost model fall in this range. A single contained problem, like one wall or a bathroom ceiling, usually comes in under it; whole-basement or post-flood work runs over it. Testing before and after is quoted separately, and should be.

See the detailed cost guide

Size it to your own job

Four questions turn the California figures into an estimate for your job.

ZIP code
Where the job is
Area
Under 10, 10 to 50, or over 50 square feet
Spread
Visible only, inside walls, or in the ducts
Place
House, condo, or rental

What comes back: a range split into assessment, remediation, and clearance testing.

Estimate your cost

Free to use. An estimate, not a quote.

Cities by county

Browse California cities by county

Every California 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.

Los Angeles County

260 pros · 78 cities

Orange County

125 pros · 25 cities

San Diego County

97 pros · 14 cities

Riverside County

72 pros · 12 cities

San Bernardino County

71 pros · 19 cities

Santa Clara County

50 pros · 9 cities

Ventura County

41 pros · 9 cities

Alameda County

40 pros · 9 cities

Contra Costa County

38 pros · 13 cities

Sacramento County

38 pros · 5 cities

Fresno County

28 pros · 2 cities

Sonoma County

27 pros · 5 cities

Kern County

26 pros · 2 cities

San Joaquin County

21 pros · 5 cities

City and County of San Francisco

18 pros · 1 city

Stanislaus County

18 pros · 4 cities

Placer County

14 pros · 5 cities

Monterey County

13 pros · 5 cities

Solano County

12 pros · 4 cities

San Mateo County

7 pros · 4 cities

Marin County

3 pros · 1 city

Nevada County

2 pros · 2 cities

Santa Cruz County

2 pros · 2 cities

Napa County

1 pro · 1 city

San Luis Obispo County

1 pro · 1 city

Yolo County

1 pro · 1 city

Other areas

5 pros · 4 cities

Every listed mold professional in California, by city

Questions people ask

Common questions about mold remediation in California

Answered without a sales pitch.

How much does mold remediation cost in California?
Most California jobs fall between $1,500 to $5,500, which is the middle half of projects in our state cost model. 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 what post-remediation testing will cost, because it is usually quoted separately.
Does California require a license to do mold remediation?
No. California has no mold-specific license and no state certification program, so the credential to ask for is an industry one: IICRC AMRT or ACAC CMR, both of which you can look up on the issuing body's public register. A general contractor or home improvement registration is a consumer protection basic, not a mold qualification.
Can you sell a house with mold in California?
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 clearance report, or to disclose it and price the work in.
How do I check a mold company in California when there is no license to look up?
Ask for three things and check each one yourself: a mold certification 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 free visit from a company that also sells remediation is a sales estimate, not an independent assessment. If you want a result you can rely on, pay an assessor who does not do the remediation, and have the same kind of independent check done after the work. That separation is the strongest protection you have, with or without a state license behind it.
What can renters in California 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 California

California does not license mold remediation, so there is no state registry to check a contractor against. Every listing is identity-checked, with state licenses, insurance, and reviews verified where available.

See all California providersBrowse mold removal companies near youBrowse all states