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What is the CSLB?

The Contractors State License Board (CSLB) is the governing agency for construction contractors in the state of California.

The CSLB’s responsibility is to protect the interests of the consumer public by requiring that anyone charging over $500 for construction services is licensed and bonded.

All of the following entities must be licensed in California:

  • Contractor Businesses 
  • Partnerships 
  • Corporations 
  • Individuals


First established in 1929 as the Contractor License Bureau, the agency began to develop vocational and construction standards in the state of California.

Now the CSLB operates under the California Department of consumer affairs. The CSLB headquarters is in Sacramento, but they have offices all over the state. 

Logo of the Contractors State License Board. Image features a paint brush, handsaw and cement truck with the letters CSLB above in white


The leadership of the CSLB is made up of a 15-member board that appoints an executive officer. The board is also responsible for directing administrative policy for the agency’s operations.

Appointments are made directly by the Governor. The CSLB operates on a $60 million annual budget and is made up of 400 employees around the state of California.

Licenses and Certifications offered by the CSLB

The Contractors State License Board currently offers 73 different contractor license classifications. Each license covers a specific area of construction expertise.

Contractor licenses are broken down into four categories: 

  • 1
    A-General Engineering
  • 2
    B-General Building
  • 3
    C-Specialty Classifications
  • 4
    C-61 / D-Limited Specialty Classifications

Each classification except those listed under the C-61/D-limited specialty class requires a construction trade exam in addition to the Contractor LAW EXAM.

Home Improvement Sales Person

Two people shaking hands with dollars in the background. The CSLB requires home improvement sales person to be registered with the state of california

Home Improvement Sales is regulated by the CSLB

The CSLB also requires home improvement salespeople to be registered with the state.

Anyone engaged in soliciting, selling, or executing contracts involving home improvement must complete Home Improvement Salesperson registration. 

The goal of regulating every aspect of the construction industry is to protect the consumer as much as possible. 

How To Get a Contractor License in California

To get a contractor license in California, you must first have 4 years journey level experience to qualify for an exam date.

You can then submit an application to the CSLB and wait to be given a test day.

After passing the exam and activating your bond, you may begin legally contracting in the state of California.

For a more in-depth look at the contractor licensing process, check out some of our other articles. The basic requirements for licensing are:

  • Be at least 18 years of age
  • Have a valid Driver's License or USA Issued Identification
  • Have a Social Security or ITIN #
  • Not Currently be on probation or parole
  • Pass the Contractor License Exam

Penalties for Contracting without a License

Contracting without a license in California can get you hit with a $15,000 fine and up to 6 months in the county jail in some cases.

If you have the experience and are actively bidding on projects, just get the license.

It is the best thing you can do to protect yourself and your clients, as well as position yourself as the authority and the professional.

CSLB Stings

A man having handcuffs put on him. The CSLB engages in sting operations targeting unlicensed contractor activity

The CSLB conducts sting operations.

The statewide investigative fraud team (SWIFT) is a wing of the CSLB dedicated to setting up sting operations targeting unlicensed contractors.

The public can report unlicensed activity, building permit complaints, and even unlicensed advertising throughout the state of California to SWIFT. 

The agency then sets up a meeting with the contractor to come to place a bid, at which point the contractor is apprehended, given a fine and ordered to appear in court.

CSLB Offices


SACRAMENTO (Headquarters)

9821 Business Park Drive
Sacramento, CA 95827


1277 East Alluvial Ave. Suite 106
Fresno, CA 93720


301 Junipero Serra Blvd. Suite 206
San Francisco, CA 94127



12501 East Imperial Hwy. Suite 620
Norwalk, CA 90650


1845 Business Center Dr. Suite 206
San Bernardino, CA 92408


9246 Lightwave Ave. Suite 130
San Diego, CA 92123


28480 Avenue Stanford Suite 120
Valencia, CA 91355


100 N. Barranca St. Suite 300
West Covina, CA 91791

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