California · Concrete licensing · official-source guide
California licenses concrete work at the state level. The Contractors State License Board issues the C-8 Concrete classification for forming, pouring, placing and finishing concrete, and C-29 Masonry for block, brick and stone. A license is required for any job worth $1,000 or more. The qualifier needs four years of journey-level experience within the past ten years, both exams, and a $25,000 bond.
Verified against agency sources on 2026-10-26. Rules and fees change; confirm with the named authority before relying on this guide.
The Contractors State License Board issues every contractor license in California. CSLB operates under the state Department of Consumer Affairs. A 15-member board appointed by the Governor and the Legislature selects the Registrar of Contractors, who directs board operations. CSLB licenses and regulates around 285,000 contractors across 45 license classifications, and its headquarters sits at 9821 Business Park Drive in Sacramento. Concrete and masonry are licensed at the state level, not by city or county. No California city issues its own concrete contractor license. Cities add a tax and permit layer on top, which is covered further down, but that layer is not a trade license. A flatwork contractor who pours in six cities in a week still carries one CSLB number. CSLB also does not split the license by project type. The same number covers a residential driveway, a warehouse slab, a set of footings and a curb and gutter run. What changes is the classification you qualified in, and whether a given job pulls in a second classification you do not hold. CSLB's Enforcement Division investigates complaints, takes disciplinary action and refers cases to local prosecutors. Its Statewide Investigative Fraud Team runs sting operations and sweeps construction sites looking for unlicensed activity, and partners with other state agencies so violations can extend to payroll, workers compensation and worker safety. Because licensing is centralized, your record travels with you. A complaint filed against your license in Fresno appears on the same public record a homeowner in San Diego reads before signing.
C-8 Concrete is the specialty classification for concrete work. The regulation, in Title 16 of the California Code of Regulations, Division 8, Article 3, says a concrete contractor forms, pours, places, finishes and installs specified mass, pavement, flat and other concrete work, and places and sets screeds for pavements or flatwork. That language covers most of what a flatwork and foundation crew sells: driveways, patios, walkways, slabs, footings, pads, curbs and paving. The classification carries two carve-outs. It does not include a contractor whose sole contracting business is applying plaster coatings. It does not include a contractor whose sole contracting business is placing and erecting steel or bars to reinforce mass, pavement, flat and other concrete work. Read that second carve-out carefully before you decide you need a separate license for rebar. It excludes rebar as a standalone contracting business, not the reinforcing you set inside your own pour. CSLB cites Business and Professions Code sections 7008 and 7059 as authority, with reference to sections 7058 and 7059. For a contractor going out to win work, C-8 is what lets you advertise, bid and contract for concrete. One license number can carry more than one classification, and many concrete contractors add C-29 Masonry because the two keep landing on the same job: a slab plus a block retaining wall, a patio plus a stone veneer sitting wall. Adding a classification to a license you already hold carries its own fee and may carry its own trade exam.
C-29 Masonry is the companion classification, defined in the same article of Title 16. A masonry contractor installs concrete units and baked clay products; concrete, glass and clay block; natural and manufactured stone; terra cotta; and fire brick or other material for refractory work. The classification includes fabricating and installing masonry component units for structural load bearing and non-load bearing walls for structures and fences, installed with or without mortar. It also includes ceramic veneer that is not tile, thin brick that resembles full brick for facing, paving, and clear waterproofing, cleaning and caulking incidental to masonry construction. Two details matter when you are quoting work. First, paving appears in both the C-8 and the C-29 definitions, so a paver patio and a poured patio can sit inside different classifications. Second, fences are named in C-29, which is why a block wall and a poured footing under it can pull two classifications into one estimate. Waterproofing, cleaning and caulking are included only when they are incidental to the masonry construction you are performing, not as a standalone service line. The authority cited is the same: Business and Professions Code sections 7008 and 7059, with reference to sections 7058 and 7059. If your work mixes poured concrete with block, brick or stone on a regular basis, holding both C-8 and C-29 on one license number is the clean answer. The alternative is subcontracting the half you are not licensed for to someone who is, which is legal and common but hands part of the margin away.
Concrete and masonry can also be performed under the B General Building classification, but B has rules that trip up contractors who assume it is a license to do everything. Business and Professions Code section 7057 defines a general building contractor as one whose principal contracting business connects to a structure built for the support, shelter and enclosure of persons, animals, chattels or movable property, requiring in its construction the use of at least two unrelated building trades or crafts. Section 7057(b) sets the limit that matters here. A general building contractor may take a prime contract or a subcontract for a framing or carpentry project. For anything else, a B cannot take a prime contract unless the contract requires at least two unrelated trades other than framing or carpentry, or unless the B holds the right classification, or subcontracts the work to an appropriately licensed specialty contractor. The same test applies to subcontracts. Framing and carpentry cannot be counted toward the two unrelated trades. Applied to concrete work, this means a B holder cannot simply take a concrete-only driveway or slab contract on the strength of the B. The job is one trade. Either the B also holds C-8, or the concrete goes to a licensed C-8 subcontractor. A full house build involving concrete, framing, roofing and more is exactly what B was written for. A standalone pour is not. Section 7057(c) adds that no B may contract for a project that includes the C-16 Fire Protection or C-57 Well Drilling classifications without holding that specialty license or subcontracting it out.
Sourcescslb.ca.gov
Any construction work valued at $1,000 or more in labor and materials must be performed by a state-licensed contractor. CSLB states plainly that it is illegal to divide a job into smaller parts to get around the $1,000 limit, which rules out the common trick of writing one invoice for the excavation and one for the pour. Below that figure the exemption is narrow. The work must cost less than $1,000 in combined labor and materials, whether the contractor or the consumer bought the materials, and the project must not require a permit and must not use workers. If the job needs a permit or employee labor, a license is required no matter how small the price. CSLB's enforcement page puts the same rule from the other direction: it is illegal for an unlicensed person to perform contracting work on any project requiring a building permit, or where employee labor is used, or valued at $1,000 or more. For concrete and masonry this is a low bar in practice. Most driveway, slab, footing and retaining wall work crosses $1,000, and much of it needs a permit. Contractors, subcontractors, specialty contractors and people in the business of home improvement must be licensed before submitting bids, not just before starting work. That means the license has to be in hand at the estimate stage. Owner-builder exemptions exist for a homeowner working on a principal residence under set conditions, and for some new single-family construction, but those exemptions belong to the property owner and never to the crew doing the pour.
Sourcescslb.ca.gov 1cslb.ca.gov 2
Every CSLB license runs through a qualifier. An individual applicant must be at least 18 years old, have a valid Social Security number or Individual Taxpayer Identification Number, and either have the knowledge, experience and skills to manage the daily activities of a construction business, including field supervision, or be represented by someone who does. The qualifier must have at least four years of journey-level work experience in the classification applied for, earned in the 10 years immediately before the application is filed. Credit is given only for time as a journeyperson, foreperson, supervising employee or contractor. CSLB defines a journeyperson as an experienced worker who can perform the trade without supervision, or who has completed an apprenticeship program, and not a trainee. Someone other than the applicant must verify the experience. CSLB accepts certification from an employer, fellow employee, another journeyperson, a contractor, a union representative, a building inspector, an architect, an engineer, a business associate, or a homeowner or client where the applicant was self-employed. The verifier must have observed the work during the period claimed and must complete and sign the Certification of Work Experience form that comes with the application. CSLB can ask for documentation of anything listed. There is no education or course requirement. CSLB may grant credit toward the four years for a completed apprenticeship program, or for technical training or completed education at an accredited school, with apprenticeship certificates and official transcripts attached. High school coursework earns no credit. Whatever credit is granted, every qualifier must still show at least one year of practical journey-level work experience. Fingerprints and an asbestos open book exam are required before CSLB issues the license.
Sourcescslb.ca.gov
Applicants must pass two exams: the law and business exam, and a trade exam in the classification applied for. Both apply to C-8 Concrete and to C-29 Masonry. The law and business exam is multiple choice and covers business management and California construction law. CSLB points candidates to the current California Contractors License Law and Reference Book to prepare, and offers free study guides. The trade exams are built with help from licensed contractors in each classification, and most include questions referring to accompanying publications with blueprints or drawings. CSLB updates exams every five to seven years. Both exams are taken on a computer at a PSI test center, after an on-screen tutorial. You get three and a half hours for each exam. Applicants should arrive 30 minutes before the scheduled time and bring government-issued photo identification. Arriving late can cost you admission and the examination registration fee. All exams are offered in English, and Spanish versions of 10 commonly taken exams exist, including law and business. Results are given before you leave the test center, with passing candidates told they passed but not given a score breakdown. CSLB says the passing percentage varies by exam and directs applicants to ask the board. An exam is not always required. If you currently serve, or within the past five years have served, as qualifying individual for the same classification on a license in good standing, or have passed the law and trade exams within the past five years, no exam is required. Separate waiver provisions sit in Business and Professions Code sections 7065.1 and 7065.2, and CSLB notes the Registrar has suspended waivers under section 7065.1(a).
Sourcescslb.ca.gov 1cslb.ca.gov 2
CSLB publishes a single fee schedule, and the figures below come from it. The original application fee, covering exam or waiver for one classification, is $450. CSLB does not refund that fee if the application is not accepted, because it is charged for processing. Once the application clears, the initial license fee is $200 for a sole owner and $350 for a non-sole owner. An additional classification requested with an original application costs $150 each. Adding a classification to a license you already hold costs $230, which is the line a C-8 holder pays to pick up C-29. Replacing the qualifier also costs $230. Adding new personnel to an existing corporation or LLC is $125, as is adding a new limited partner to a partnership. A license reactivation application costs $450 for a sole owner and $700 for a non-sole owner. A joint venture application totals $800 for one classification, including the initial license fee. Asbestos certification and hazardous substance removal certification applications each cost $125. Fingerprinting carries a $32 Department of Justice processing fee and a $17 FBI processing fee, both paid to the live scan operator, plus a rolling fee that each live scan site sets on its own. On the miscellaneous side, a duplicate or replacement pocket or wall certificate is $25, a business name change is $100, a certified license history is $67 per name researched, and a general status letter or bond status letter is $8. Applicable fees are tied to the postmark date or the date the paperwork is hand-delivered to CSLB headquarters in Sacramento.
Sourcescslb.ca.gov 1cslb.ca.gov 2
A contractor bond must be on file before CSLB can issue an active license, reactivate an inactive license, or renew an active license. The authority is Business and Professions Code section 7071.6. Since January 1, 2023, under Senate Bill 607, the contractor license bond, the bond of qualifying individual and the disciplinary bond are all set at $25,000. The bond must be written by a surety licensed through the California Department of Insurance, on a form approved by the Attorney General's Office, signed by the surety's attorney-in-fact, and the business name and license number on it must match CSLB records exactly. A corporate or LLC license also needs a $25,000 bond of qualifying individual for every responsible managing employee and for responsible managing officers who own less than 10 percent of the voting stock or equity. An LLC license carries more: a $100,000 LLC worker bond on top of the $25,000 contractor bond, plus liability insurance with a $1 million aggregate limit for licenses with five or fewer listed personnel, an extra $100,000 for each additional person listed, and a $5 million ceiling. Some contractors file a cashier's check with the state instead of a surety bond, which changes how a consumer collects: a civil action is required, and CSLB can only pay out under a court order. Watch cancellation. A license bond is canceled 30 days after CSLB receives a cancellation notice from the bond company, and if no reinstatement or replacement bond arrives inside that window the license is suspended. A suspended license cannot bid or contract.
This is the single biggest difference between a concrete license and most other California specialty licenses, and it is easy to miss. California law requires employers in construction to carry workers compensation insurance even with one employee. Most CSLB licensees with no employees can file a signed exemption certifying they have no employees at this time. C-8 cannot. CSLB states that all active C-8 Concrete contractors, along with C-20 Warm-Air Heating, Ventilating and Air-Conditioning, C-22 Asbestos Abatement, C-39 Roofing and C-61/D-49 Tree Service contractors, are required to carry workers compensation insurance or hold a valid Certification of Self-Insurance from the Department of Industrial Relations, whether or not they have employees. CSLB cites Business and Professions Code section 7125. A one-person concrete company in California therefore budgets for a workers compensation policy from day one. C-29 Masonry is not on that list, so a masonry contractor with no employees can file the exemption instead. A contractor holding both classifications is bound by the stricter rule the moment the C-8 is active. Licensees must also report up to the top three workers compensation classification codes carrying the highest estimated payroll on the policy, under section 7125.6. CSLB notes it does not verify or investigate the accuracy of those codes. Certificates must be written by an insurer licensed through the California Department of Insurance and must list CSLB as the certificate holder, with the license number, or the application number if no license has issued yet, on the document. CSLB returns certificates with the wrong business name, insurer name or policy number, which can create a gap in license standing.
Sourcescslb.ca.gov 1cslb.ca.gov 2
Active licenses expire every two years. Inactive licenses expire every four years. CSLB mails a renewal application roughly 60 days before expiration, and if nothing arrives within 45 days of the expiration date you can order a renewal online or by phone. An acceptable renewal has to reach CSLB headquarters before the expiration date to avoid unlicensed time, and CSLB warns that processing times vary, so late filing is a real risk to your ability to contract. The fees are published: timely active renewal is $450 for a sole owner and $700 for a non-sole owner, timely inactive renewal is $300 and $500, delinquent active renewal is $675 and $1,050, and delinquent inactive renewal is $450 and $750. There is a safety net. Since 2021, under Senate Bill 1474, the Registrar is required to retroactively reinstate an expired license if a completed renewal application and the appropriate fees arrive within 90 days of the expiration date. A license renewed inactive needs no bond, no workers compensation filing and no designated qualifying individual, but the holder cannot bid or contract. Going back to active status takes a reactivation application and fee. A change in business entity, a change to the owner of a sole owner license, a change in general partners, or a new corporate registration number from the Secretary of State all block renewal and force a new license application, which means a new license number. CSLB's renewal instructions list fees, entity status and bond matters, and set out no continuing education hours.
California does not recognize a contractor license issued by another state or country. To work as a contractor here you apply to CSLB and get a California license. What CSLB does have is a set of reciprocity agreements that can waive the written trade exam. Those agreements cover contractors licensed in Arizona, Louisiana, Mississippi, Nevada and North Carolina. The requirements are the same for each: the classification applied for must appear on CSLB's Reciprocal Classifications List, the contractor must have held an active license in good standing in one of those states for the previous five years, the out-of-state licensing agency must complete CSLB's Request for Verification of License form, and the contractor files the standard Application for Original Contractor's License. Concrete and masonry are on the list. CSLB's table maps Arizona's C-9 Concrete and K-9 Concrete to California C-8 Concrete, and Arizona's C-31 Masonry and K-31 Masonry to California C-29 Masonry, and pairs the concrete and masonry classifications of the other reciprocal states with C-8 and C-29 as well. Reciprocity waives the trade exam, not the whole process. Applicants still take and pass the CSLB law and business exam and still go through certification of relevant work experience. A separate path exists for contractors who have passed the NASCLA Commercial General Builders examination, but it applies only to the California General Building classification, needs five years of general building licensure in good standing, and requires a signed waiver request plus NASCLA sharing the exam results with California. A California contractor seeking reciprocity elsewhere gets the form from that state and has it forwarded to CSLB.
Contracting for work valued at $1,000 or more without a license can lead to misdemeanor charges. CSLB publishes the exposure: a first offense carries up to six months in jail and a fine of up to $5,000, plus potential administrative fines from $200 to $15,000. Subsequent violations bring increased criminal penalties and fines. Contracting without a license in a state or federally declared disaster area can bring felony charges, which matters in California after wildfires, when demand for foundations, flatwork and retaining walls spikes in burn areas. Enforcement is active rather than complaint-only. CSLB's Statewide Investigative Fraud Team has teams around the state that run stings on a regular basis and sweep construction sites, and it runs joint operations with other state agencies. CSLB describes those partnerships as raising the penalties and fines for violators by widening the scope of the violations to taxes, illegal payrolls, workers compensation insurance and worker safety. For a licensed contractor, that enforcement is competitive protection worth using. CSLB says unlicensed contractors lack accountability, have a high rate of involvement in construction scams, and compete unfairly against licensed contractors who carry bonds and insurance. The board takes reports of unlicensed activity and reports of illegal advertising by unlicensed contractors through its own channels, which gives a licensed concrete contractor a direct way to act when an unlicensed crew is underbidding on price while skipping the bond and the workers compensation policy that the licensed bid has to carry.
Sourcescslb.ca.gov 1cslb.ca.gov 2
This is where the license stops being paperwork and starts shaping your marketing. Licensed contractors must include the license number in all construction contracts, subcontracts and calls for bid, and in all forms of advertising. CSLB names the formats: newspapers and radio, business cards, lettering on a vehicle, brochures, directories, a contract proposal, and any website or post that solicits business on the internet. A website and a social post are advertising, so the number belongs on both. The civil penalty for leaving it off runs from $100 to $1,000 for a first offense. Vehicles have their own rule. C-36 Plumbing, C-45 Sign and C-57 Well Drilling contractors must display business name, address and license number on each side of every commercially registered vehicle in letters at least one and a half inches high. Every other contractor, concrete and masonry included, must display business name and license number on each commercially registered vehicle in a clearly visible location, in print type of at least 72 point or letters at least three quarters of an inch high and wide. You cannot advertise for work outside the classifications you hold. CSLB's own example is that a C-29 Masonry contractor cannot advertise for electrical work without also holding C-10. The same page notes that A General Engineering and B General Building licensees can advertise as general contractors, which a C-8 or C-29 holder cannot. The law also bars stating in advertising or any public presentation that you are bonded. Using false, misleading or deceptive advertising to induce improvement contracts is a misdemeanor.
Sourcescslb.ca.gov
A CSLB license is not a business license. Cities charge and register separately, and a concrete crew that crosses city lines can owe in several at once. In Los Angeles, the Office of Finance issues the Business Tax Registration Certificate. The city tells new businesses to check whether the work is being conducted inside city limits, to check the business address against city boundaries, and to register online, and warns that registering late stacks up back taxes and fees. In San Diego, the Office of the City Treasurer runs the Business Tax Program, and the city states that all businesses operating in the City of San Diego are required to obtain a Business Tax Certificate, naming home-based businesses, self-employed persons and independent contractors specifically. San Francisco has the rule most likely to catch a traveling concrete contractor. The city's Business and Tax Regulations Code generally requires every person engaging in business within the city to register within 30 days after commencing business, with renewal every year by the last day of February, and registration generally valid for one year from April 1 through March 31. Registration is required regardless of whether the business is subject to taxation. The triggers include maintaining a fixed place of business in San Francisco, performing work or rendering services in San Francisco for all or part of any seven days during one tax year, soliciting business there for all or part of any seven days, or employing capital on property there. Seven days of pours inside city limits is enough. Check each city you bid in before the first job, not after.
CSLB runs a free public lookup at its Check A License page. A homeowner or general contractor can search by contractor license number or by contractor business name, and CSLB describes the result as verifying information including complaint disclosure. The search tips are worth knowing because customers get them wrong. A California contractor license number contains no alphabetic characters, runs up to eight digits, and should be entered starting at the left position. Name searches work better last name first, so a search for John Smith Construction is typed as Smith John Con, and searches return up to 50 names at a time with a link to the next 50. Commas and periods are not used in business names but apostrophes are, and spacing between initials matters. The license detail page carries a Contractor's Bond History link, which lets a consumer identify which surety wrote the bond in place at the time of their contract. CSLB also runs a Workers' Compensation Company Search and a Surety Bond Company Search, plus a public data portal. None of this costs anything. A paid option exists for formal needs: a certified license history for a licensed or unlicensed contractor costs $67 per name researched, and a general status letter or bond status letter costs $8. Point customers at the lookup yourself. A C-8 or C-29 number printed on your estimate and your website, next to a line telling the customer where to verify it, turns the state record into part of your pitch instead of something a competitor uses against you.
These are common details other guides publish about California, but we could not verify them from the agency source. Confirm them directly before relying on them.
C-8 Concrete. The regulation says a concrete contractor forms, pours, places, finishes and installs specified mass, pavement, flat and other concrete work, and places and sets screeds for pavements or flatwork. That covers driveways, patios, slabs, footings, pads and curbs. Block, brick and stone sit under C-29 Masonry instead.
Only if you contract for masonry. C-29 covers concrete units, baked clay products, block, natural and manufactured stone, terra cotta and refractory material, plus load bearing and non-load bearing walls and fences. A slab with a block retaining wall touches both. One license number can hold both classifications.
Generally no. Section 7057 says a B cannot take a prime contract or subcontract for trades other than framing or carpentry unless the work requires at least two unrelated trades beyond framing and carpentry, or the B holds the right classification, or the B subcontracts to an appropriately licensed specialty contractor.
Yes, and it is narrow. Work must cost less than $1,000 in combined labor and materials, and the project must not require a permit and must not use workers. CSLB says splitting a job into smaller parts to stay under $1,000 is illegal. Most concrete work clears the threshold anyway.
Four years of journey-level work experience in the classification applied for, earned within the 10 years immediately before filing. Credit counts only for time as a journeyperson, foreperson, supervising employee or contractor. Someone else must certify it on CSLB's Certification of Work Experience form and must have observed the work.
Yes. CSLB states that all active C-8 Concrete contractors must carry workers compensation insurance or hold a valid Certification of Self-Insurance, whether or not they have employees. The authority is Business and Professions Code section 7125. C-29 Masonry is not on that list, so a masonry-only licensee can file the exemption.
The contractor license bond, bond of qualifying individual and disciplinary bond are each $25,000, raised to that level on January 1, 2023 by Senate Bill 607. The bond must be on file before CSLB issues, reactivates or renews an active license. LLC licenses add a $100,000 worker bond and liability insurance.
In all construction contracts, subcontracts and calls for bid, and in all forms of advertising. CSLB names business cards, vehicle lettering, brochures, directories, contract proposals, newspapers, radio and any website or internet post that solicits business. The civil penalty for omitting it runs from $100 to $1,000 for a first offense.
Concrete and masonry contractors must display business name and contractor license number on each commercially registered vehicle, in a clearly visible location, in print type of at least 72 point or letters at least three quarters of an inch high and wide. The larger one and a half inch rule applies to C-36, C-45 and C-57.
No. CSLB's advertising guidance says you cannot advertise for construction work outside the areas you are licensed for, and that A General Engineering and B General Building licensees are the ones who can advertise as general contractors. You also cannot state in advertising or any public presentation that you are bonded.
Not directly. California does not recognize out-of-state licenses, but reciprocity can waive the trade exam. CSLB's list maps Arizona C-9 and K-9 Concrete to California C-8, and C-31 and K-31 Masonry to C-29. You need five years in good standing, verification from Arizona, and the CSLB law and business exam.
Usually yes. Los Angeles issues a Business Tax Registration Certificate through its Office of Finance. San Diego requires a Business Tax Certificate from all businesses operating in the city, including self-employed persons. San Francisco requires registration within 30 days, triggered by performing work there for parts of any seven days in a tax year.
We can review the local market, your current search visibility, and paid-search fit before recommending any marketing work.