California contractor trade licensing guide

California requires a contractor license for almost any construction work priced at $1,000 or more in combined labor and materials, work that needs a building permit, or work that uses any paid help beyond you. Splitting a job into smaller invoices to stay under $1,000 doesn't work — the Contractors State License Board (CSLB) treats it as the same violation as never filing at all.

This guide covers how CSLB structures licenses, what you need to qualify, how to apply, what electricians need beyond the contractor license, how reciprocity works if you're licensed elsewhere, and how renewal works.

License classifications

California runs contractor licensing through a single board, the CSLB. There's no split between general trades and electrical work, and no separate local registration tier the way some states use.

Every license draws from the following four categories.

• Class A covers general engineering: grading, water and sewage systems, highways, and bridges.
• Class B covers general building, where two or more unrelated trades share one contract.
• Class B-2 covers residential remodeling that touches at least three building trades.
• Class C covers 38 specialty trades, from C-8 concrete to C-10 electrical to C-39 roofing.

You can add classifications to one license as you qualify for them, with no cap.

Getting a license

Qualifying for a CSLB license means meeting every requirement below.

• Age 18 or older, with the experience and skill to run the daily operations of a construction business, including field supervision, or a qualifying individual who has that experience on your behalf.
• Four years of experience at a journey level, or as a foreman, supervisor, or contractor, in the classification you're applying for, completed within the ten years before you file. Education and training can cover part of that: up to one and a half years for an associate degree in construction management, up to two years for a related bachelor's degree or a law degree, and up to three years for a completed trade apprenticeship or a bachelor's degree in construction management or engineering. At least one of the four years has to be hands-on.
• Passing scores on both the Law and Business exam and your trade exam, which PSI administers. You get 18 months from acceptance to pass both, and a passing score holds for five years if you need time to retake the other one.
• Fingerprints through Live Scan — CSLB checks them against the California Department of Justice and the FBI for a criminal record. This applies to every officer, partner, owner, and responsible managing employee named on the application, not just the person applying.
• A $25,000 contractor bond, or a $25,000 cash deposit in place of one, plus a separate $25,000 bond covering your qualifying individual unless that person owns 10% or more of the business.
• Proof of workers' compensation insurance, or an exemption if you have no employees. Concrete, heating and air conditioning, asbestos abatement, roofing, and tree service contractors can't file that exemption.
• A completed asbestos open-book exam. Every new applicant takes it, regardless of trade.
• The application fee of $450 and the initial license fee of $200 for a sole owner, or $350 for anyone else, which covers your first two years.

Applying to CSLB

1. Confirm your classification, your four years of qualifying experience within the last ten years, and your age before you file. The $450 application fee isn't refundable if you don't qualify.
2. File the Application for Original Contractor License with CSLB.
3. After CSLB accepts your application, you'll get a Live Scan packet and a Notice to Schedule an Examination. Get fingerprinted at a Live Scan site and pay the $49 processing fee, plus that site's own rolling fee.
4. Schedule and pass both the Law and Business exam and your trade exam through PSI. Each runs three and a half hours, and you have 18 months from acceptance to pass both.
5. Once you pass, CSLB sends a bond and fee letter listing what's still due: your $25,000 contractor bond, your qualifying individual's $25,000 bond if it applies, proof of workers' compensation insurance or an exemption, the completed asbestos open-book exam, and the initial license fee.
6. CSLB issues your license once every requirement clears. You'll receive a wall certificate and a pocket card afterward.

Electrician certification

A C-10 license covers the contracting business, not the person doing the wiring. Anyone performing electrical work under a C-10 contractor, other than the licensee, needs a separate certification from the Division of Labor Standards Enforcement (DLSE), part of the Department of Industrial Relations.

The contractor doesn't need it personally — every certified or apprentice electrician on the crew does, and DLSE issues and renews that credential separately from CSLB.

Reciprocity with other states

CSLB has reciprocity agreements with five states—Arizona, Louisiana, Mississippi, Nevada, and North Carolina—mapped classification by classification. Hold an Arizona A-9 Swimming Pools license, for example, and CSLB matches it to a C-53 Swimming Pool license here, waiving your trade exam. You still have to pass the Law and Business exam regardless of where your original license came from.

Louisiana, Mississippi, and North Carolina route through a narrower path for General Building. You need the National Association of State Contractors Licensing Agencies (NASCLA) Commercial Building exam and five years in good standing on your existing license before CSLB waives the trade exam for a B license.

CSLB can still require the trade exam despite reciprocity, at its own discretion. The agreement lowers the bar, it doesn't remove it.

Renewing your license

CSLB licenses run in two-year blocks. Renew on time on active status, and it costs $450 for a sole owner or $700 for anyone else—C-10 electrical contractors pay $20 more on each ($470 and $720). Miss the deadline, and the delinquent fee jumps to $675 or $1,050.

Inactive renewal is cheaper ($300 or $500) and covers four years instead of two, but you can't bid or contract while inactive.

Most classifications carry no continuing education requirement. Asbestos-related and lead-abatement classifications are the exception, where continuing education stays mandatory.