A website or truck cannot expand the work you are legally allowed to perform. California treats websites, online posts, business cards, vehicle lettering, brochures, directories, proposals, newspapers, and radio solicitations as advertising. The message must match the license status and scope behind it.
Read CSLB's official Advertising Guidelines for Contractors and the current minor-work bulletin before publishing an ad.
Rules for an unlicensed operator
Effective January 1, 2025, CSLB says an unlicensed person may advertise for work up to $1,000 if the advertisement discloses that the person is not licensed. That does not mean every advertised job below $1,000 is lawful. The job cannot require a building permit, cannot use employee labor, and cannot be part of a larger project split into smaller contracts.
The exemption does not apply to a person who advertises as licensed or qualified to act as a contractor. Avoid names, badges, copy, and category selections that make that representation when no qualifying license exists.
Rules for licensed contractors
Licensed contractors must put their license number in construction contracts, subcontracts, calls for bid, and every form of advertising. CSLB publishes a civil penalty between $100 and $1,000 for a first violation of that requirement.
Advertising must stay within the classifications held. CSLB's example says a C-29 Masonry contractor cannot advertise electrical work without also holding C-10 Electrical. A General Engineering or General Building contractor can advertise as a general contractor, but the actual project must still fit the classification's scope.
Commercial vehicle markings
C-36 Plumbing, C-45 Sign, and C-57 Well Drilling contractors must show the business name, address, and license number on both sides of every commercially registered vehicle in letters at least 1.5 inches high.
Other contractors must show the business name and contractor license number on each commercially registered vehicle in a clearly visible location using at least 72-point type or letters at least three-quarters of an inch high and wide.
Do not advertise that you are bonded
CSLB's guide says California law prevents contractors from stating in advertising or public presentations that they are bonded. The concern is that “bonded” can imply more consumer protection than the bond actually provides. Carrying a required bond does not create permission to market that claim.
False and misleading advertising
CSLB states that using false, misleading, or deceptive advertising to induce improvement contracts can be a misdemeanor when clients may be misled or injured. Avoid unverifiable rankings, invented certifications, false license status, another person's license number, and guarantees that contradict the contract.
Pre-publication checklist
- Confirm the legal business name and current license status.
- Match every promoted service to a held classification.
- Place the license number on every ad and proposal when licensed.
- If unlicensed, use a clear disclosure and keep the promoted work inside the full exemption.
- Check vehicle lettering against the correct trade-specific size rule.
- Remove “bonded” claims.
- Keep screenshots or dated copies of active advertising.
California advertising FAQ
Can an unlicensed handyman advertise?
Yes, within CSLB's narrow rule: advertise work up to $1,000, disclose that you are not licensed, and accept only jobs that meet every exemption condition.
Does a social-media post count as advertising?
CSLB includes any website or internet post that solicits business in its advertising examples.
Can I advertise work outside my classification?
No. CSLB says contractors cannot advertise construction work outside the areas for which they are licensed.
This page is general operational information, not legal advice. Advertising, licensing, and permit facts depend on the current record and actual project. Confirm your materials with CSLB or qualified California counsel before publishing them.