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September 11, 2026
Hiring a contractor in San Diego County? Here's exactly how to verify their license, what the results mean, and what red flags to watch for before you sign anything.
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You’ve got a contractor’s name, maybe a business card, maybe a referral from a neighbor. They seem professional. The quote looks reasonable. But something in the back of your head says — verify this first.
That instinct is worth following. California has roughly 300,000 licensed contractors, and an unknown number of unlicensed ones actively bidding on jobs they can’t legally touch. In San Diego County specifically, the risks are a little different than anywhere else in the state — and a two-minute check on the CSLB website can be the difference between a smooth project and a very expensive lesson.
Here’s everything you need to know to do it right.
The Contractors State License Board — the CSLB — is the state agency that licenses, regulates, and disciplines contractors in California. Their free public lookup tool lives at cslb.ca.gov, and it requires no login, no account, and no fee. You just need either the contractor’s license number or their business name.
Once you run the search, you’ll see the license status (active, suspended, expired, or revoked), the license classifications they hold, whether their bond is current, and whether workers’ compensation insurance is on file. Each of those fields matters — and skipping any one of them leaves a gap in your verification.
When you pull up a contractor’s record on the CSLB site, the first thing you want to confirm is that the license number they gave you actually matches the business name you’re hiring. This sounds obvious, but it’s where a lot of homeowners get tripped up.
License farming — where a licensed contractor allows an unlicensed person to use their license number — is illegal in California and more common than most people realize. The way you catch it is simple: cross-reference both the number and the name. If the license number belongs to a different company than the one who gave you the quote, that’s a serious problem.
Beyond the name match, look at the license status field carefully. “Active” is what you want. Anything else — suspended, expired, revoked — means the contractor cannot legally perform work on your project. In fiscal year 2023–24 alone, the CSLB revoked 542 licenses and suspended another 525. That’s over a thousand contractors who were licensed at some point but aren’t anymore. A recommendation from six months ago doesn’t guarantee a clean record today.
You’ll also want to check the bond status. As of January 1, 2023, all active California contractors are required to carry a $25,000 surety bond. This bond exists specifically to protect you — if a contractor does faulty or incomplete work and won’t make it right, the bond is one of the financial remedies available to you. If the bond shows as lapsed or inactive, that’s a red flag even if the license itself reads as active.
Finally, confirm that workers’ compensation insurance is on file. If a crew member gets injured on your property and the contractor doesn’t carry workers’ comp, you could be held liable. The CSLB lookup will show whether workers’ comp is active or whether the contractor has claimed an exemption. If they’ve claimed an exemption, ask why — and make sure you understand what that means for your exposure.
California has more than 44 separate contractor license classifications, and a license in one category doesn’t authorize work in another. This is one of the most common misunderstandings homeowners have when they check a contractor’s record and see “active” — they assume that covers everything. It doesn’t.
The two main categories are Class A (general engineering), Class B (general building), and Class C (specialty). A B General Building Contractor license — which is what we hold at MRH Pro Construction & Painting — covers most residential construction and exterior remodeling work, including structural carpentry, siding, stucco, and window replacement. But painting, for example, falls under the C33 Painting and Decorating classification. We hold both, which means we can legally perform both the structural exterior work and the painting under a single contractor without handing either portion off to a subcontractor.
Why does this matter to you? Because if a contractor holds only a C33 painting license and they’re also doing your siding or stucco framing, they’re working outside their licensed scope. That work is technically unlicensed — and if something goes wrong, your protections are compromised.
When you’re reviewing a contractor’s CSLB record, look at the classifications listed and match them against the actual scope of work in your estimate. If the scope includes painting and structural exterior work, you want to see both a B and a C33 — or confirm that the contractor is using properly licensed subcontractors for the portions outside their classification. Either way, ask the question directly. Any legitimate contractor will answer it without hesitation.
To obtain any CSLB license, a contractor must demonstrate at least four years of journey-level trade experience, pass both a Law & Business exam and a Trade exam with a minimum 73% score, clear a background check, and maintain an active bond and workers’ comp coverage. It’s not a rubber stamp — which is part of why the license is worth verifying.
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San Diego County isn’t like the rest of California when it comes to contractor verification. There’s a specific dynamic here that doesn’t exist in Los Angeles, the Bay Area, or anywhere else in the state: it’s common for homeowners in San Diego County to hire contractors who primarily operate out of Mexico. These contractors often offer significantly lower bids — and some do good work — but many do not hold a valid CSLB license. California law requires a CSLB license for any project over $500, regardless of where the contractor is based or where they live.
That matters because without a licensed contractor, you lose access to CSLB mediation, bond claims, and the Contractors Recovery Fund if something goes wrong.
In April 2022, the CSLB’s Statewide Investigative Fraud Team ran an undercover sting operation in Vista — right here in San Diego County — and caught unlicensed contractors making bids as high as $11,245 for home improvement work. The CSLB’s own press release from that sting included this line: “If you don’t see a license number on the ad, assume they’re not licensed.”
That’s not a hypothetical warning. It happened here, in this county, at price points that look like normal contractor bids. The unlicensed operators caught in that sting weren’t obviously sketchy — they were bidding on real jobs at real prices. The only way to know the difference is to check.
Beyond the cross-border issue, San Diego County has over 20,700 licensed contractors spread across 29+ cities — from Oceanside and Carlsbad on the coast to Escondido and Poway inland, down through Chula Vista and National City in the South Bay. That’s a large pool, which means there’s no shortage of legitimate options. But it also means there’s no shortage of people willing to represent themselves as licensed when they’re not.
If you’re doing work in unincorporated San Diego County — areas outside city limits like parts of Alpine, Ramona, or Granite Hills — permits go through the County Planning & Development Services portal, not a city-specific development department. Make sure your contractor knows the difference and is pulling permits through the right channel. An unlicensed contractor won’t pull permits at all, which creates problems when you go to sell the home.
Every contractor’s website says “licensed, bonded, and insured.” The phrase has been repeated so many times it barely registers anymore. What actually matters is whether you can verify each of those three things independently — because a claim on a website costs nothing, and the CSLB lookup takes two minutes.
Licensed means the contractor holds a current, active CSLB license in the classification that covers your project. Bonded means their $25,000 surety bond is active and on file with the CSLB — not just claimed. Insured means they carry workers’ compensation coverage for their crew, which protects you from liability if someone is injured on your property. All three of these are visible in the CSLB public lookup. None of them require you to take anyone’s word for it.
At MRH Pro Construction & Painting, we hold a B General Building Contractor license and a C33 Painting and Decorating license — both active and both verifiable right now at cslb.ca.gov. Our BuildZoom score of 95 ranks us in the top 22% of 336,931 licensed California contractors. We’ve been BBB Accredited since September 2024. Our crew of seven works directly for you — no subcontractors, which means no license gaps and no accountability gaps.
We’ve been doing exterior remodeling in San Diego County for 16 years. The licenses are newer than that — because the CSLB requires four years of verified journey-level experience before you can even apply, and we spent those years building our knowledge from the inside of the trade before we took on direct client work. That experience shapes how we approach every project, from material selection suited to San Diego County’s coastal climate and UV exposure, to permit coordination with the right county or city department for your specific address.
If you’re in the middle of evaluating contractors and want to verify our license before you do anything else — please do. We’d rather you check than take our word for it. That’s the whole point of this guide.
Checking a contractor’s license in California is free, takes under two minutes, and tells you more than any business card or website ever will. Active license status, correct classifications for your project scope, a current bond, and workers’ comp on file — those four things together give you a real picture of who you’re hiring.
In San Diego County, that check matters more than it does in most other markets. The combination of a large licensed contractor pool, an active unlicensed operator problem, and a cross-border dynamic that doesn’t exist anywhere else in California means the stakes of skipping this step are genuinely higher here.
If you’re looking for an exterior remodeling contractor you can verify before you call, MRH Pro Construction & Painting is a good place to start. Reach out by phone or text at 619-481-7245 — we’re available Monday through Friday, 7am to 5pm, and we’re happy to answer questions before you commit to anything.
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