Check a California contractor's license by asking for the license number and classification, then confirming both with the Contractors State License Board before work begins. No state license specific to mold removal was found in this site's sources, so ask what any mold credential is and who issued it.
Key takeaways
- Ask every contractor for its license number and its classification before you agree to any scope.
- Confirm the number and the classification with the Contractors State License Board, and note the date you checked.
- The classification tells you what kinds of work the contractor is licensed to perform.
- Compare the license with the classes that any certification attaches to, such as the Hazardous Substance Removal Certification.
- No California mold-specific license category was found, so treat any mold credential as an industry credential unless the Board says otherwise.
- Keep the license check with the scope, the readings and the photographs.
Why check the license before any work starts?
A license confirms that a business is recognized by the state for the work it describes. Checking it before the work begins is the simplest protection against a crew that is not qualified for the job in front of it.
The license is a state matter, and the Contractors State License Board holds the record. A crew that cannot give you a license number, or whose number does not match its paperwork, is a warning sign that deserves a pause before you approve any scope or any payment.
Checking takes a few minutes, and the record you keep from it is useful later. An insurer, a rebuild trade or a court may ask who did the work and whether they were licensed for it.
What is a license classification?
A classification is the part of the license that sets out the kind of work the contractor may perform. Two licenses can both be valid and still differ in what they allow, so the classification matters as much as the number.
The classifications are listed by the Board, and each carries its own description. A classification that fits a repair to a roof is not the same as one that fits a repair to a plumbing line or a floor, and the crew's scope should match the class it holds.
Compare the work in the scope with the classification on the license. Where the scope includes work outside the class, ask the crew how that work will be covered, and whether another licensed contractor will do it.
How do I confirm a license with the Board?
Use the license number the crew gives you, check the classification and the status against the Board's record, and note the date. Use the number, not only the name, because similar names are common among businesses.
The Board's own licensing classifications pages describe each class and list the certifications that attach to certain classes. Read the classification against that description, and do not rely on the crew's summary of what its license allows.
Keep a note of the number, the classification, the status and the date of the check. If you check again later, the note shows whether the license has changed in the meantime.
Does a water damage crew need a particular license?
The license a water damage crew needs depends on the work it performs, and the sources this guide uses do not set out which class applies to each task. Ask the crew to name the classification that covers its work and explain how the classification applies.
Some water damage work is drying and extraction, and some is repair work that falls under other trades. A crew doing only drying may describe its license differently from one doing structural or plumbing work. Ask which parts of the scope the crew carries out itself and which it hands to other licensed trades.
Where the certification question arises, the Hazardous Substance Removal Certification is attached to listed classes. Ask whether the crew holds it, and whether it applies to your job.
What about a mold license?
No California mold-specific license category was found in the sources used for this site. Ask what any mold credential the crew shows is, who issued it and whether it has legal standing in California.
An industry certificate for mold work can show real training. It is still not a state license, and a crew should say so when it presents one. Presenting an industry credential as a license is a misleading claim, and it is worth noting if you hear it.
If mold is part of the scope, ask the crew which of its licensed classes covers the removal, and whether a certification applies. Keep the answer in writing with the scope.
What if the license does not match the work?
Stop before any work begins and ask the crew to explain. A license that does not cover the work is a reason to find a different contractor, or to ask the crew to bring in a licensed trade for the part it cannot do.
A crew that is honest about the limits of its license will say so early. It can name the trade that covers the work it cannot do, and it can explain how that trade will be brought in. That answer is a good sign.
A crew that resists the question, or that begins work outside its class without explanation, should be stopped. Keep the record of what was asked and what was answered, since it may matter later.
What should I keep from the check?
Keep the license number, the classification, the status, the date of the check and any written statement about the work. Keep those with the scope, the readings and the photographs for the whole job.
The file is what an insurer, a rebuild trade or a board will ask for first. A single page with the license details, the check date and the scope reference is enough, and it saves time later.
Do not put a license number on a public post or a shared document. Keep it in your own file, and share it only with the people who need it for the job.
How do I read a license record without misreading it?
Read the status, the classification and any notes on the record, and check that the business name and the address match what the contractor gave you. A record that does not match should be questioned before you rely on it.
Start with the status. A license can be active, inactive, suspended or otherwise restricted, and the difference matters. An inactive or suspended license is not a basis for hiring a contractor for any work, whatever the contractor says about its plans to renew.
Then check the name and address. A business can use a name that differs from its legal name, and a record may show a different address from the one on the contractor's paperwork. Ask the contractor to explain the difference, and keep the explanation in writing. Do not accept a verbal assurance on a mismatch.
What should I do if a crew subcontracts part of the job?
Ask the crew which trades it will bring in, check each of their license numbers and classifications, and make sure the scope shows who is doing each part. A subcontractor is still a licensed trade, and it must be checked on its own record.
Subcontracting is common on a water job, because plumbing, electrical and flooring work fall to other trades. Ask for the names and license numbers of each subcontractor before the work begins, and check each one with the Board in the same way as the main contractor.
Ask the main contractor who is responsible for the subcontractor's work, and how a problem with that work will be handled. A written answer is the record you need if a repair fails later, and it tells you who to call first.
What should I ask the crew before I sign anything?
Ask for the license number and classification, the scope in writing, the names of any subcontractors and the readings that support the scope. Ask who will sign the paperwork for any permit and who will be on site.
Ask whether the crew carries the insurance that its work requires, and ask for a copy of the certificate. Check the dates on the certificate, and ask the insurer named on it to confirm the coverage if the document is unclear. A certificate is evidence of coverage, and it should be read, not just filed.
Ask what happens if the scope changes during the job. A crew that changes the scope should explain the change, show the reading and wait for your approval. A contractor that begins extra work without that step is one to stop and review.
Why does a complaint to the Board matter?
A complaint to the Contractors State License Board is a record that can protect the next homeowner or business, and it is the route for a question about a contractor's license or conduct. Keep the facts in order and give the license number.
A complaint should set out what the contractor did, what it was asked to do, when, and what outcome you want. Attach the scope, the readings and any written statement. Keep the complaint factual and avoid guessing at the contractor's intent.
The Board is the authority on licensing questions. A complaint about the license, the classification or the way a contractor holds itself out is for the Board to take up, and it is separate from any dispute over money, which may need a lawyer or a court.
Frequently asked questions
Where do I check a California contractor license?
Check it with the Contractors State License Board, using the license number the contractor gives you. Compare the classification on the license with the work in the scope.
What if the contractor will not give me a license number?
Do not approve the scope or any payment until the number is given. A contractor that will not give its license number is a reason to find another company.
Does a license number prove the work is good?
No. A license confirms the business is recognized for the classes it holds. It does not promise the quality of the work, which is why the scope, the readings and the photographs matter.
Is there a California license for mold removal?
No California mold-specific license category was found in the sources used for this guide. Ask the contractor what any mold credential is and who issued it.
Should the contractor hold the certification?
Only if the certification applies to the work. The Hazardous Substance Removal Certification is attached to listed classes, and whether it is needed for a given job should be answered by the crew in writing.
How often should I check?
Check when you first hire the contractor and again before any payment or change to the scope. A license can change status, and the date of each check should be recorded.
What if the license is suspended?
Do not hire the contractor for any work until the status is confirmed as active. A suspended license is a serious warning, and the Board's record is the place to check it.
Sources
This guide is general information for San Diego County homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.