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How to Verify a Contractor's License Before You Hire Them in California

Published July 25, 2026

A step by step guide to checking a contractor's CSLB license, bond, and insurance before you sign anything or hand over a deposit.

If you self-manage a rental in the South Bay, you will eventually need to hire a contractor directly, whether that's a plumber for a slab leak or an electrician for a panel upgrade. Before you hire anyone, check their license status through the Contractors State License Board's free lookup tool. It takes about two minutes and tells you whether the person is legally allowed to do the work you're paying for.

Why this matters more than it seems

When Schofield manages a property, our vendor list is already vetted. When you self-manage, that verification step is on you, and it's easy to skip when a contractor seems friendly, shows up on time, and quotes a fair price. But California takes licensing seriously. Under state law, performing contracting work where the combined cost of labor and materials is $500 or more without a current CSLB license is a misdemeanor for the contractor. California also carved out a narrow exemption effective January 1, 2025, raising the threshold for small, permit free jobs with no hired help to $1,000, but that exemption disappears the moment a building permit is required or the person doing the work brings on employees. For most repair or improvement work at a rental property, permits or scope push you past that line, so licensing is not optional.

The risk isn't just theoretical. If you hire someone unlicensed and a worker gets hurt on your property, you can end up treated as the employer for workers' compensation purposes, which is a liability exposure most owners never intend to take on. You can also lose contract protections and warranty rights that only apply when you've hired a properly licensed contractor.

Step 1: Get the contractor's license number

Ask for it directly, and expect it without hesitation. A legitimate contractor gives you their license number without being asked twice, usually printed right on their estimate, business card, or truck. If someone is cagey about it, that's already a signal.

Step 2: Run the CSLB lookup

Go to CSLB's Check A License tool. You can search by license number, business name, or personnel name, license number is the fastest and most reliable. The license detail page will show you:

Step 3: Match the classification to the actual job

This is the step owners skip most often. A contractor can be fully "Active" and still be the wrong license for your specific repair. If you're replacing a water heater, you want a C-36 plumbing classification, not a general B license holder subcontracting the work out without telling you. Ask directly which classification applies to the work you need, then confirm it matches what CSLB shows.

Step 4: Keep records before the work starts

Save a screenshot or printout of the license lookup results with the date you checked. If a dispute ever comes up, or you need to file a complaint, CSLB will ask what you verified and when. This also protects you if a license lapses partway through a longer job. Licenses can expire or change status, so for any project spanning weeks, it's worth a quick re-check before final payment.

What a license alone doesn't cover

A clean license check is the floor, not the whole picture. Ask for proof of general liability insurance directly from the contractor, separate from what CSLB shows for bonding and workers' comp. Also confirm any required permits are pulled by the contractor before work begins, especially for electrical, plumbing, or structural changes. An owner who authorizes unpermitted work can face problems at resale or insurance claim time that have nothing to do with licensing at all.

Common questions

What if a contractor says the job is small enough to skip licensing?

Be skeptical. The small job exemption only applies when the total labor and materials cost stays under the current threshold, no building permit is required, and the contractor hires no employees for the job. Most rental repairs involving plumbing, electrical, or anything requiring a permit fall outside that exemption regardless of price.

Does CSLB show me the contractor's actual insurance certificate?

The license lookup shows bonding and workers' compensation status, not a full liability insurance certificate. For general liability coverage, ask the contractor to send you a certificate of insurance directly, and consider asking to be named as an additional insured for the duration of the job.

What happens if I hire someone whose license turns out to be inactive?

You've effectively hired an unlicensed contractor, even if you didn't know. You can lose certain legal protections and warranty rights, and you may be exposed to liability you didn't intend to take on. Confirming active status before work starts, not after a problem shows up, is the only way to avoid this.

Last verified: July 25, 2026. This is general information for property owners, not legal advice.

Kellie

Schofield Properties

323 Richmond Street, El Segundo, CA 90245

Topics: self-management, maintenance, contractors, landlord-guide

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Schofield Properties is a family run property management company at 323 Richmond St, El Segundo, CA 90245. We have managed the South Bay since 1972 and personally oversee about 186 doors today. Book a call to talk about your property.