A California C-22 Asbestos Abatement Contractor license authorizes containment, encapsulation, or removal and disposal of asbestos-containing construction materials in and on buildings and structures. That’s the exact scope defined by California Code of Regulations, Title 16, Section 832.22, tied to Labor Code Section 6501.8. What makes C-22 different from every other CSLB specialty classification: it functions as a stand-alone license tied directly to a separate state safety registration — the Department of Industrial Relations’ Division of Occupational Safety and Health (DOSH) — regardless of what other CSLB classifications you hold. The facts below come from CSLB regulation, statute, and CSLB’s own examination study guide, not marketing copy.
What a C-22 License Actually Covers
The regulation defines a C-22 contractor as one who “performs abatement, including containment, encapsulation, or removal, and disposal of asbestos containing construction materials in and on buildings and structures” (CCR Title 16 §832.22). All work and documentation must follow DOSH’s own regulations and requirements. CSLB’s C-22 exam study guide breaks the trade into five tested areas: Planning and Estimating (15%), Containment Site Preparation (26%), Asbestos Abatement Methods and Disposal (26%), Documentation (12%), and Safety (21%) — containment and removal methods together make up more than half the exam, reflecting how procedure-heavy this trade is.
What C-22 does not cover: “any addition to or alteration, repair, or rehabilitation of the permanently retained portions” of a building, and — per Business and Professions Code §7058.7 — general hazardous substance removal and remediation beyond asbestos specifically. A site with both asbestos and other contamination (lead paint, contaminated soil) may need C-22 plus a separate hazardous-substance certification, not C-22 alone. Not sure which classification fits your work? Our classification finder walks through the scope differences before you commit to an exam.
The DOSH Registration Requirement — C-22’s Defining Difference
CSLB will not issue a C-22 license unless the applicant is already registered with DOSH under Labor Code §6501.5, or has an active DOSH registration application in process. Every C-22 holder must also complete DOSH’s registration training under California Code of Regulations, Title 8, Section 1529. After the license issues, CSLB requires proof of DOSH registration within 90 days — miss that window and the license faces automatic suspension or removal of the C-22 classification. Renewal requires keeping that DOSH registration current, not just paying CSLB’s own renewal fee. This is the one classification where a second state agency’s registration is a hard prerequisite to holding the license at all, not an optional add-on.
How C-22 Differs From C-21 and General Hazmat Work
C-21 Building Moving/Demolition is the classification most often paired with C-22 on the same project. C-21 covers physically raising, moving, or tearing down a structure; it explicitly does not include performing asbestos abatement — that’s carved out to C-22 specifically. On a demolition job where a hazardous-materials survey finds asbestos, the abatement has to happen under a licensed C-22 contractor (or a firm holding both licenses) before or during the C-21 demolition work. See our C-21 Building Moving/Demolition guide for that classification’s scope.
General hazardous substance removal and remediation — contamination beyond asbestos, like lead, mold, or contaminated soil — is explicitly excluded from C-22 under Business and Professions Code §7058.7. That work sits under a separate hazardous substance certification track, not the asbestos-specific C-22 classification.
Licensing Requirements: Experience, Bond, and Fees
Experience
CSLB requires four years of asbestos-abatement-specific experience within the preceding ten years, working as a journeyman, foreman, supervising employee, or contractor for a licensed C-22 contractor, an out-of-state licensed contractor, a utility company, a government agency, or the armed forces. Claimed experience must be documented (wage records, tax forms, employer certification) per California Code of Regulations §824.
Bond and Fees
Every active license needs a $25,000 contractor’s bond on file (Business and Professions Code §7071.6, raised from $15,000 by Senate Bill 607, effective January 1, 2023 — still current in 2026). If your Responsible Managing Employee holds less than 10% ownership, or you use an RMO arrangement, CSLB also requires a separate $25,000 Bond of a Qualifying Individual.
The application fee is $450 (single classification, non-refundable regardless of outcome). After passing, the initial license fee is $200 for a sole owner or $350 for any other entity, covering the first two-year period; renewal is $450 every two years after that. Live Scan fingerprinting is a separate cost paid to the vendor, typically reported in the $70–$90 range. See current exam-prep pricing if you’re budgeting the whole path to licensure, not just CSLB’s fees.
Workers’ Compensation — No Exemption Available
Senate Bill 1455 pushed the requirement for every California licensee to carry workers’ comp regardless of employee count back to January 1, 2028 — but C-22 is one of only five classifications where that future deadline doesn’t matter, because C-22 contractors are already barred from filing the no-employee exemption today. The other four are C-8 Concrete, C-20 HVAC, C-39 Roofing, and C-61/D-49 Tree Service. A solo C-22 operator with zero employees still has to carry workers’ compensation insurance now, not in 2028.
The C-22 Trade Exam
The C-22 exam is a separate, closed-book, computer-based test administered through PSI, distinct from the required Law and Business exam every applicant also takes. Per CSLB’s own study guide, it’s multiple-choice with four options per question, one best answer, no penalty for guessing, and a calculator is provided for math-based questions (like calculating square footage of material to be removed). CSLB calls its content-area percentages “approximate” and does not publish an exact question count or passing-score percentage for C-22 specifically, so this article won’t invent one. Structured, current practice with real content matters more than a rumored percentage — the premise behind Contractor Pathway’s C-22 study guide and practice exams, one of the most competitive CSLB exam-prep programs built for this classification.
Who Needs a C-22 License?
Specialty abatement firms performing containment, encapsulation, and removal on renovation and demolition projects; environmental remediation companies expanding into California construction-related asbestos work; and demolition contractors who want to hold both C-21 and C-22 rather than subcontracting the abatement scope.
Frequently Asked Questions
Do I need to register with DOSH before or after getting my CSLB license?
Either order works to start the process, but CSLB won’t actually issue the C-22 license unless you’re already DOSH-registered or have an active DOSH application pending. And once the license is issued, you must show proof of completed DOSH registration within 90 days or risk automatic suspension — so treat DOSH registration as a parallel requirement, not something to defer until after your CSLB license arrives.
Can a C-22 contractor also hold a general contractor’s license?
Yes — C-22 is described in regulation as operating “as a stand-alone specialty contractor classification for asbestos abatement work, regardless of any other classification(s) that may be held by the licensed contractor.” A B General Building or C-21 Demolition contractor can add C-22, but the abatement work itself still must be performed within the scope of that contractor’s DOSH registration.
Does C-22 cover lead paint or mold remediation?
No. C-22’s scope is asbestos-containing material specifically. Business and Professions Code §7058.7 excludes general hazardous substance removal and remediation from this classification — lead, mold, and other contamination fall under separate certification requirements, not C-22.
Is the C-22 exam open-book?
No. CSLB’s own study guide states plainly that it is a closed-book examination — no reference materials may be used at the test site. Some third-party sources describe an “open book” asbestos exam, but that refers to separate DOSH/Cal-OSHA certification materials, not the CSLB C-22 licensing exam itself.
Getting the classification right is the easy part — passing the exam is where contractors actually get stuck. See how Contractor Pathway’s prep process works, and if you’re still unsure which classification fits before spending the $450 application fee, reach out and we’ll help you sort it out first.