The one question you should ask every contractor — before the quote.
"Are you licensed, and may I see the license number?" Every minute spent verifying a CSLB license before signing saves weeks of pain after something breaks. Here's what California law actually requires, what goes wrong when customers skip the check, and how to do the check yourself in under a minute.
California doesn't care if the job looks good. It cares who's legally on the hook.
Hiring an unlicensed contractor in California isn't just risky — it unwinds most of the protections customers assume they have. Four things quietly disappear the moment an unlicensed crew steps onto your site.
The law blocks them from being paid.
Business & Professions Code § 7031 says an unlicensed contractor cannot legally collect payment for any work requiring a license — and a customer who already paid can sue to recover the money. Sounds customer-friendly. It isn't: the fight ends up in your court, on your dime, and pauses your project.
Your property insurance may refuse the claim.
Most commercial and homeowner policies exclude damage caused by unlicensed work. If an unlicensed electrician starts a fire, your carrier can deny coverage — and pursue subrogation against a contractor who has no insurance and no assets. You absorb the loss.
Code inspections surface months later.
Unpermitted or unlicensed electrical, HVAC, and low-voltage work shows up during remodels, refinances, or insurance inspections — years after the contractor disappeared. Rip-and-replace at that point routinely costs 3–5× the original install.
Warranties and liens aren't enforceable.
An unlicensed contractor can't perfect a mechanic's lien. That sounds like a win until you realize the flip side: you can't enforce the warranty either, and there's no CSLB recovery fund to claim against if they walk.
If you see any of these, stop.
These patterns are how most customers end up with unlicensed or license-borrowing contractors on their site. Each one is a line we'd walk away from as buyers.
01 · Price
A bid 30%+ below the rest.
On any non-trivial commercial job, a 30%+ discount against three qualified bids is a signal the contractor is skipping permits, using unlicensed labor, or pricing in a change-order ambush. Ask what they're doing differently — if the answer is vague, the savings vanish by month three.
02 · License
The license is in someone else's name.
"License loaning" (aka RMO-shopping) happens when a contractor pays a licensed qualifier to list their name on paperwork — but doesn't actually work on your site. It's illegal under B&P § 7068.1, and your first sign is a license number whose qualifier doesn't match the person running the crew. Ask who's on-site daily; then compare to the license lookup.
03 · Paper trail
No MSA, no permit, no COI.
Any legitimate contractor can produce, on request: a signed Master Services Agreement, a permit application (or filed permit), and a current Certificate of Insurance naming your entity as additional insured. If any of the three is "not needed for a job this size," they're not the right vendor.
Three clicks. Every time.
The California CSLB publishes every license — status, classification, bond, workers' comp, and any complaints — for free. Do this before you sign anything. ANI's license number is displayed in our footer, on every proposal, and on every permit we pull.
- 01
Open the CSLB lookup.
Visit cslb.ca.gov and click "Check a License." The tool is publicly searchable — no account, no login.
- 02
Search by license number or business name.
License numbers are the most reliable lookup. Business names work too, but many contractors operate under a DBA that doesn't match the legal entity on the license.
- 03
Confirm: status, classifications, bond, workers' comp.
Status must read "Active" (not "Inactive" or "Suspended"). Classifications must include the work they're pitching you — a C-10 holder can't legally prime an HVAC job. Bond and Workers' Compensation must both be on file.
The five questions we hear every week.
Does a C-10 Electrical contractor need a separate C-7 license for low-voltage work?
No. Per CSLB's published scope for C-10 (Title 16 CCR § 832.10), an electrical contractor may install, service, and maintain electrical work at any voltage level — which includes the structured cabling, CCTV, access control, and networking work traditionally assigned to C-7. A dedicated C-7 is only required when a contractor holds no C-10 and wants to do low-voltage only. ANI Networks holds C-10, so our low-voltage scope is legally covered.
What's the difference between a B (General Building) and a C (specialty) license?
A B license holder can prime a project that uses two or more unrelated trades. A C license covers one specialty. The important nuance: a B holder still has to use properly licensed specialty contractors (either their own employees with the right C license, or a subcontractor). ANI holds B plus C-10 and C-20 in-house, so we can both prime the job and self-perform the specialty work — no subcontractor handoff.
How do I know a license is real and active, not borrowed or expired?
Run the license number through cslb.ca.gov's lookup. It shows current status (Active / Inactive / Suspended), the classifications currently held, the bond amount, workers' comp status, and any disciplinary actions. If the contractor's crew doesn't match the listed qualifier or officers, ask why — legitimate contractors can explain their org structure.
What's the penalty if my contractor turns out to be unlicensed?
For you as the customer: your insurance claim may be denied, your warranty is unenforceable, and you may have to redo the work for code compliance when you sell or refinance. For the contractor: first offense is a misdemeanor (up to 6 months jail, $5,000 fine); subsequent offenses escalate to felony-level penalties. Enforcement is real — CSLB runs sting operations in every county.
Does the CSLB license cover the people showing up at my site, or just the company?
The license covers the entity (corporation or sole proprietorship) and whichever qualifier(s) — the responsible managing employee (RME) or officer (RMO) — are listed on file. Day-to-day technicians working under that license don't need their own CSLB license, but the qualifier is legally responsible for their work. At ANI, our qualifiers are full-time employees — not a paid name on paperwork.
Three active licenses. All in the company's name.
B (General Building Contractor), C-10 (Electrical — which covers the low-voltage scope normally assigned to C-7), and C-20 (Warm-Air Heating, Ventilating & Air-Conditioning). Every permit, bond, and insurance filing is under ANI Networks, Inc. — never borrowed, never sub-contracted out of scope. Verify us before you sign.
- CSLB BGeneral Building Contractor
- CSLB C-10Electrical (covers low-voltage)
- CSLB C-20HVAC (Warm-Air Heating, Ventilating & A/C)
Let's build infrastructure that thinks.
Bring us a site walk, a floor plan, or a problem you're tired of re-explaining to three different vendors. We'll return a scoped, quoted, AI-native plan — usually within a week.