A California C-21 Building Moving/Demolition Contractor license authorizes you to raise, lower, crib, underpin, demolish, and move or remove structures — including their foundations. That’s the classification’s exact legal scope under California Code of Regulations, Title 16, Section 832.21, authorized by Business and Professions Code Sections 7008 and 7059. It’s a narrower license than most people assume: C-21 covers the act of moving or tearing a structure down, not the new construction, grading, or remodeling that typically follows. The facts below come from CSLB regulations, statute, and CSLB’s own examination study guide — not marketing copy.
What a C-21 License Actually Covers
The regulation is precise: a building moving/demolition contractor “raises, lowers, cribs, underpins, demolishes and moves or removes structures, including their foundations” (CCR Title 16 §832.21). In practice, that spans two distinct trade activities CSLB groups under one classification:
- Building moving — evaluating a structure’s weight and structural integrity, cribbing and underpinning it, then raising, lowering, or relocating it intact (house-moving, historic-structure relocation, elevating homes for flood compliance)
- Structure demolition — pre-demolition site preparation, tearing down single- and multi-story structures, separating and hauling demolished materials, and cleaning/backfilling the site afterward
CSLB’s own C-21 exam study guide breaks the trade into five tested content areas: Planning and Estimating (25%), Project Preparation (20%), Building Moving (13%), Structure Demolition (21%), and Safety (21%). Project Preparation explicitly includes “removing hazardous materials” as a planning step — but actually performing asbestos abatement is carved out to a separate license, covered next.
What C-21 does not cover: “the alterations, additions, repairs or rehabilitation of the permanently retained portions of such structures” (CCR §832.21). If part of a building stays standing and gets remodeled, that retained-portion work falls to whatever classification matches the trade — framing, electrical, plumbing, etc. — not C-21. Not sure which classification actually fits your work? Our classification finder walks through the scope differences before you commit to an exam.
How C-21 Differs From C-22, A, and C-8
C-22 Asbestos Abatement is the classification most often confused with C-21 on a teardown job. If a structure contains asbestos-containing material, containment, encapsulation, or removal of that material is C-22 scope specifically — a stand-alone specialty license requiring separate DOSH registration. C-21’s own study guide lists “removing hazardous materials” only as a planning/notification step, not a license to perform the abatement itself. Most demolition contractors either subcontract the abatement to a licensed C-22 firm or hold both licenses. See our C-22 Asbestos Abatement guide for that classification’s scope.
Class A General Engineering overlaps on large civil projects — site work, grading, and earthmoving that often follows a demolition. A can self-perform excavation and grading directly tied to a civil engineering project, but raising, cribbing, or demolishing a structure itself is still C-21’s defined scope, not A’s.
C-8 Concrete covers forming and placing concrete, including new foundations and flatwork. Removing an old foundation as part of a demolition is C-21 scope; pouring the replacement foundation on the same site is C-8 (or B, if the general contractor self-performs it as part of a larger build).
A Class B General Building contractor can self-perform work spanning two or more unrelated trades on a single contract, but framing and carpentry can’t count as one of those two required trades. A B contractor overseeing a teardown-rebuild often subcontracts the demolition portion to a licensed C-21 firm rather than self-performing it.
Licensing Requirements: Experience, Bond, and Fees
Experience
CSLB requires four years of journeyman-level, foreman, supervising employee, or contractor experience in building moving/demolition work within the preceding ten years. Up to three of those years can come from a relevant apprenticeship or trade school, but CSLB requires at least one full year of verifiable hands-on field experience. 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
Senate Bill 1455 pushed the requirement for every California licensee to carry workers’ comp regardless of employee count back to January 1, 2028. As of 2026, only five classifications are barred from filing a no-employee exemption: C-8 Concrete, C-20 HVAC, C-22 Asbestos Abatement, C-39 Roofing, and C-61/D-49 Tree Service. C-21 isn’t on that list, so a solo C-21 operator with no employees can still file the standard exemption — for now.
The C-21 Trade Exam
The C-21 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 (current for exams scheduled July 1, 2024 forward), it’s multiple-choice with four options per question, one best answer, no penalty for guessing, and a calculator is provided for the math-based estimating questions. CSLB’s guide breaks content weighting into Planning and Estimating (25%), Project Preparation (20%), Building Moving (13%), Structure Demolition (21%), and Safety (21%) — CSLB itself calls these figures “approximate” and does not publish an exact question count or passing-score percentage for C-21 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-21 study guide and practice exams, one of the most competitive CSLB exam-prep programs built for this classification.
Who Needs a C-21 License?
House-moving and structure-relocation companies; demolition contractors clearing sites for new construction; developers and general contractors handling teardown-rebuild projects who don’t want to subcontract the demolition scope; and specialty firms raising or underpinning historic structures for foundation repair or flood elevation.
Frequently Asked Questions
Does demolishing a building with asbestos require a separate license?
Yes. C-21’s scope covers the physical raising, moving, and demolition of a structure, but containment, encapsulation, or removal of asbestos-containing material is C-22 Asbestos Abatement scope specifically, requiring separate DOSH registration. Most demolition jobs on older buildings need an asbestos survey and, if material is found, a licensed C-22 contractor (or firm holding both licenses) before physical demolition proceeds.
Does C-21 cover grading or excavation after a building is torn down?
Not on its own. C-21’s defined scope is raising, lowering, cribbing, underpinning, demolishing, and moving/removing structures and their foundations — it doesn’t extend to general site grading or earthwork beyond that. Larger grading and excavation work typically falls to a Class A General Engineering contractor or, on a self-performed general-building project, a Class B contractor.
Can a C-21 contractor rebuild on the same site after demolition?
Not under C-21 alone. The regulation explicitly excludes “alterations, additions, repairs or rehabilitation of the permanently retained portions” — and by extension, new construction on a cleared site needs the classification matching that trade (B General Building for a full rebuild, or the relevant specialty classifications).
What’s the difference between C-21 work and the handyman exemption?
Assembly Bill 2622 raised California’s unlicensed “handyman” exemption to $1,000 total labor-and-materials per project as of January 1, 2025, up from $500. It only applies if no building permit is required and the person has no employees. Structure demolition and building moving almost always require a permit, which puts the work back under licensing law regardless of project cost.
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.