Can You Use Someone Else's Contractor License in California?

California requires most contractors performing construction work valued at $1,000 or more (labor and materials combined) to hold a valid Contractors State License Board (CSLB) license. Borrowing a contractor license, lending yours, or using a CSLB license number that isn’t assigned to you are all violations California actively enforces.

The penalties can apply to both the license holder and the person using the license. In almost every case, the answer is no. If your work requires a California contractor license, you cannot perform that work under someone else’s license.

First: What California Actually Requires

The Contractors State License Board (CSLB) licenses nearly every construction trade in California. That includes a Class B General Building Contractor license for general construction work, as well as dozens of specialty classifications covering electrical, plumbing, HVAC, roofing, concrete, and more.

As of January 1, 2025, California raised the minor work exemption threshold from $500 to $1,000 under AB 2622. But the exemption is narrow: it only applies to work that doesn’t require a building permit and where the person performing the work doesn’t employ any workers. If the job requires a permit, or if you hire anyone to help, a CSLB license is required regardless of the project value.

The full list of license classifications is at cslb.ca.gov.

What Using Someone Else’s Contractor License Looks Like in California

It usually looks something like this.

An unlicensed contractor picks up a job. He doesn’t have a CSLB license. A friend does. So he pulls the permit under the friend’s license number, does the work, collects the check. The licensed contractor never sets foot on the job.

Or a company brings in a licensed contractor, not as an employee or real subcontractor, just to put his license number on their paperwork. He’s not supervising the work. He’s not showing up. He’s just a number.

Both situations can expose the parties involved to criminal prosecution, not just administrative discipline.

Consequences for the License Holder

If someone is using your license outside the circumstances permitted by California law and CSLB rules, you’re exposing both of you to serious penalties.

Allowing another person to use your contractor license can result in license suspension or revocation. CSLB can also issue civil penalties ranging from $200 to $15,000 depending on the violation under Business and Professions Code §7028.7.

You’re risking the license your livelihood depends on.

California law does allow certain employment and supervision arrangements. Those situations are very different from allowing another contractor to perform independent work using your license. If you’re unsure whether a specific arrangement is permitted under your classification, check the applicable CSLB rules before assuming it’s fine.

And beyond the penalties: any work done under your license is work you’re tied to legally. If it fails inspection. If a homeowner files a complaint. If an insurance claim comes in. Your name is on the record.

Consequences for the Person Using the License

Under Business and Professions Code §7027.3, any person, licensed or unlicensed, who uses another person’s contractor license can face felony charges. The statute authorizes penalties including a fine up to $10,000, imprisonment in state prison, or county jail for up to one year, or both.

If you used someone else’s license without their authorization, you could also face additional criminal charges depending on the circumstances.

Using someone else’s license doesn’t erase the fact that you weren’t properly licensed. It can create additional criminal liability on top of the underlying unlicensed work. This isn’t borrowing a contractor license. It’s using another person’s license illegally.

If you performed work without any license at all, that’s still a misdemeanor: up to six months in jail and a $5,000 fine, plus an administrative fine of $1,500 to $15,000. A second offense triggers a mandatory 90-day jail sentence and a fine of 20% of the contract price or $5,000, whichever is greater.

Under Business and Professions Code §7031, unlicensed contractors can lose the legal right to collect payment for their work. You can complete the job and still have no legal recourse to get paid.

Why People Try It Anyway

Contractors usually do it for one of three reasons: to take on work they otherwise couldn’t perform legally, to keep a project moving, or because they expect to get licensed later.

The risk is wildly disproportionate to any short-term benefit. A fine of $10,000 plus potential state prison time on a job that might pay a fraction of that isn’t a trade-off. And the licensed contractor who lent you their number isn’t walking away clean either.

The Right Way to Handle It

If you need a license, get one. Start at cslb.ca.gov.

If you have a license and you’re thinking about letting someone use it, even for one job, even for a guy you trust: don’t. If he’s genuinely working for you as an employee or legitimate subcontractor in an arrangement permitted under your classification’s specific rules, that’s a different conversation. But if he’s doing independent work under your number while you’re somewhere else, you’re both at serious risk.

This isn’t just a rule that exists on paper. CSLB’s Statewide Investigative Fraud Team (SWIFT) regularly conducts undercover sting operations and construction site sweeps across California. If a permit, inspection, complaint, or insurance claim raises questions about who actually performed the work, using someone else’s contractor license in California can quickly become a criminal problem.

A license is tied to the person or business that earned it. Treating it like something that can be borrowed for a weekend job can mean fines, a suspended license, or a felony conviction. If your work requires a California contractor license, the only safe option is to work under one you’re legally authorized to use.

Can You Use Another Contractor’s License if You Work for Them?

This is a question that comes up constantly, and the answer depends on what “working for them” actually means.

Employees working for a properly licensed contractor generally do not need their own contractor license to perform work on behalf of that contractor. That is very different from operating an independent business under someone else’s license number. If you’re bidding jobs, signing contracts, pulling permits, or presenting yourself as the licensed contractor, California law has separate contractor licensing requirements. Using another contractor’s license in that situation, even with their permission, is not the same as being their employee.

If you’re operating your own business, bidding your own jobs, or pulling permits under someone else’s license, you’re likely outside the type of employment relationship California law allows.