What the CSLB certification is, which license classes it attaches to, and what to ask a crew about it.
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The Hazardous Substance Removal Certification is issued by the Contractors State License Board in California to contractors who already hold one of several license classes, including A, B, C-12, C-21, C-36, C-57 and C-61/D-40. Whether a water damage job needs it is not confirmed here, so ask the crew directly before work begins.
The Hazardous Substance Removal Certification is one of the few credentials connected to restoration work that California's Contractors State License Board issues. It is a certification added to an existing contractor license, not a license on its own, and it is held by contractors who already hold one of the license classes that the Board lists. That makes it easy to confuse with a mold license, which California does not appear to issue.
Water damage restoration sits near that line. Water-damaged materials can be contaminated, and some of the work overlaps with what the certification covers. This page does not claim that a water job requires the certification, because the source material does not settle that question. It explains what the certification is, so that you can ask a crew the right questions and check the answers yourself.
Read this page alongside the guide on checking a California contractor license. The license class and the certification are different things, and a crew should be able to tell you both.
Do not handle any material you suspect is hazardous, such as a chemical spill, sewage or heavy contamination, without the crew present. Do not mix cleaning products, and do not use bleach with ammonia-based products. Keep children and pets out of the area until the crew has confirmed the room is safe. Ask the crew how the material was classified before anyone enters the affected space.
A contractor that holds one of the listed classes may apply for the Hazardous Substance Removal Certification. Holding the class does not mean the certification is held, so ask for both. The crew should be able to show both on request.
When a crew holds the certification, it should be able to show it, name the license class it is attached to, and explain how it applies to the work. The certification is one credential among several, and it does not replace the contractor license itself.
Some companies advertise a mold certification from an industry body. That is not a California state license. Ask what the credential is, who issued it, and whether it has any legal standing in California. The answer is usually that it is an industry credential and not a state license.
A job may not require the certification even when the crew holds it. Clean-water extraction and drying often do not involve hazardous removal. The crew should be able to say why the certification does or does not apply, and why it is or is not part of the scope.
A crew is dispatched as fast as one is available, and you approve the estimate before any work starts.
It covers the removal of hazardous substances by a contractor who already holds a qualifying license class. It is a certification attached to that license, and it does not give a contractor authority to do work outside its license classes.
The Board lists the classes that can hold the certification as A, B, C-12, C-21, C-36, C-57 and C-61/D-40. Those are the classes that the certification attaches to, and a contractor not holding one of them cannot hold the certification.
The certification's scope is removal of hazardous substances. It is not a general restoration license, and it does not cover all water damage work. Ask the crew to explain which part of its work the certification supports.
The source material does not settle that question. Whether a particular water job requires the certification depends on the material and the work involved, and the crew should explain its position in writing before work starts.
Water that is clean and that dries in place often does not involve hazardous removal. Water that has contacted contaminated ground, sewage or a chemical may involve removal work that falls under the certification or a related requirement.
This page does not say which of those cases needs the certification. Ask the crew, ask the Contractors State License Board how the classes apply, and keep the answer in writing.
No California mold-specific license category was found in the sources this site relies on. Mold work may be covered by other license classes or by the certification, but that is a question to ask the crew and to check with the Board, not a claim this page makes.
Mold after water damage is often treated as part of the drying and cleaning work, and the crew should explain how it handles visible growth and what it tests for. An industry certification is not a state license, and a crew should say so if it holds one.
Do not accept a claim that a state mold license exists without a source. Ask for the name of the license and check it with the Board.
The certification is attached to a contractor license in a listed class. A crew with a valid license can hold the certification, and a crew without the license cannot. The license number and the classification are the first things to check.
Think of the license as the base and the certification as an addition. The base tells you what the contractor is allowed to do, and the addition tells you the contractor has extra authority in one area. Both matter, and neither replaces the other.
The crew should show both on request. If it cannot show the license number, that is the first problem to solve before work starts.
A good crew answers the question clearly, gives its license number and classification, and explains whether the certification applies to your job. It does not promise a particular outcome or price in the answer, and it puts the explanation in writing.
Expect the crew to ask about the source of the water and what it touched before it answers. That is the question on which the certification question depends, and a crew that asks it is thinking about the work rather than the sale.
If the answer is unclear, ask for a written statement and keep it. A written statement is the record the Board, your insurer or a court would look at first.
Ask for the contractor license number and its classification, and check it with the Contractors State License Board. The Board's classification page lists the classes that can hold the Hazardous Substance Removal Certification, so you can compare the class on the license with the list.
Ask whether the crew holds the Hazardous Substance Removal Certification and whether it considers the certification required for your particular job. A good answer names the material, the reason and the source. If the answer is vague, ask for the answer in writing.
Ask how the crew decides whether a material is hazardous. Water that has been in contact with contaminated ground, sewage or a chemical spill is handled differently from clean supply-line water, and the crew should explain how the category was set.
The scope should list what is being removed and why, with the readings or the testing that support the decision. Removal that is not supported by readings or testing should be questioned before work starts.
Keep the license number, the classification, any certification details and the written scope in one file. If a dispute comes up later, that file is what you will need, and it is what the Board or your insurer will ask for first.
A certification issued by the state board applies in San Diego as it does across California. The question for a local job is not whether the certification exists, but whether the work at a particular building needs it. That is answered by the crew's assessment of the water and the materials, not by the location.
San Diego County has several incorporated cities and unincorporated communities, and a contractor working in any of them must hold the license its work requires. The license checks on this page apply the same way in each of them.
Water that reaches a building from a river, a storm drain or the ground can carry material that the crew must classify before it is removed. The category decision is the step where the certification question is most likely to come up.
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The Hazardous Substance Removal Certification is issued by the Contractors State License Board to contractors who already hold a listed license class, including A, B, C-12, C-21, C-36, C-57 and C-61/D-40.
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. It is a certification attached to a contractor license in a listed class. A contractor needs a qualifying license first, and the certification is held in addition to it. Ask the crew for both the license number and the certification details.
The Contractors State License Board lists classes A, B, C-12, C-21, C-36, C-57 and C-61/D-40 as the classes the certification attaches to. Check the Board's classification page to confirm the current list before you rely on it.
A small clean-water leak may not involve hazardous removal, but the question is still worth asking. The crew should explain how it classified the water and whether any removal is subject to the certification. A short, clear answer is what you should expect.
No. A mold certification from an industry body is not a California state license. No California mold-specific license category was found in the sources used for this site. Ask the crew what the certification is and who issued it.
Check the license number and classification with the Contractors State License Board. Ask the crew for its license number and compare the classification on the license with the classes the certification attaches to.
Ask why, and ask for the reason in writing. A crew that says the certification is not needed should be able to explain how the water was classified and what the removal work involves. If you are not satisfied, check with the Board before you approve the scope.