The short version: Verify any California contractor at cslb.ca.gov → “Check a License” before hiring. Confirm four things: status is Active, the classification (A / B / specific C-class) matches your work, the $25,000 bond is active, and workers comp is in place. California caps the deposit at 10% or $1,000, whichever is less — a higher demand is illegal. For any project over $500, hire CSLB-licensed only; below that you have no CSLB recourse.
California’s CSLB lookup, step by step
California has one of the strongest contractor-licensing systems in the country, run by the Contractors State License Board (CSLB). For a senior homeowner, it is a five-minute verification that prevents the most common and most expensive contractor problems.
This is the California-specific companion to our national state contractor license lookup guide. For the full vetting workflow, see How to Find a Senior-Friendly Contractor.
To verify: go to cslb.ca.gov → “Check a License” → search by license number, business name, or personnel name.1
The four fields that matter
- Status — must read Active. Not Expired, Suspended, or Revoked.
- Classification — must cover your work (see below).
- Bond — California requires a $25,000 contractor bond on every active license.3
- Workers compensation — active if the contractor has employees; “exempt” only if they truly have none.
The CSLB page also shows disciplinary history and complaints — read the recent ones.
California license classifications
| Class | Covers | Typical senior project |
|---|---|---|
| A — General Engineering | Infrastructure, site work | Rarely relevant |
| B — General Building | Projects with 2+ unrelated trades | Whole bathroom or kitchen remodel |
| C-36 Plumbing | Plumbing only | Walk-in tub plumbing, fixture work |
| C-10 Electrical | Electrical only | Bedside circuits, GFCI, lighting |
| C-20 HVAC | Heating/cooling | Heat pump, furnace |
| C-39 Roofing | Roofing only | Roof repair |
The classification on the license must cover the work you are hiring for.2 A C-39 roofer cannot legally remodel your bathroom. For a full accessibility remodel touching multiple trades, you typically want a Class B contractor (or specialty C contractors for single-trade work).
The 10% deposit law — California’s strongest protection
California caps the down payment on a home improvement contract at 10 percent of the contract price or $1,000, whichever is less.3 This is one of the strongest senior consumer protections in the US.
A contractor demanding 50 percent upfront is violating state law — reject it and report to the CSLB. The remaining balance should track work progress, not be paid in advance. This single law defuses the most common senior-contractor disappearance pattern (collect a big deposit, vanish). For the full pattern, see Contractor Red Flags That Cost Seniors $50,000.
If something goes wrong: the CSLB complaint
If a licensed California contractor defrauds, abandons, or does defective work, file a complaint at cslb.ca.gov. The CSLB can investigate, discipline or revoke the license, and refer egregious cases for criminal prosecution. California’s enhanced elder-financial-abuse statutes increase penalties when the victim is a senior.4
For unlicensed-contractor fraud (common after wildfires and other disasters), also report to your county district attorney’s consumer-protection unit.
California senior-specific notes
- Post-wildfire scams: After California wildfires, unlicensed “contractors” and storm chasers descend on affected senior neighborhoods. The CSLB runs disaster-response sweeps, but verification is your first defense — never hire a door-to-door contractor after a disaster. Call your insurer first.
- Over $500 = license required: It is legal to hire unlicensed for jobs under $500, but you lose all CSLB recourse. For senior projects over $500, CSLB-licensed only.
- Caregivers verifying remotely: the entire CSLB check is online — a caregiver can verify a parent’s contractor from anywhere.
- Verify at cslb.ca.gov → “Check a License”
- Status Active · classification matches work · $25K bond active · workers comp in place
- Deposit capped at 10% or $1,000 (whichever less) — more is illegal
- Over $500 needs a license; under $500 you lose CSLB recourse
- Problems → free CSLB complaint; elder-abuse statutes raise penalties
Related coverage
- State Contractor License Lookup: All 50 States — the national hub
- How to Find a Senior-Friendly Contractor — master pillar
- Contractor Red Flags That Cost Seniors $50,000 — the deposit scam
- Reading the Contract: 7 Clauses to Watch
- Contractor Insurance & Bonding: What to Verify
- California HEEHRA heat pump rebates — for CA senior HVAC projects
Citations
- Check a License. California Contractors State License Board (CSLB), retrieved May 25, 2026. cslb.ca.gov.
- License Classifications. California Contractors State License Board (CSLB), retrieved May 25, 2026. cslb.ca.gov/classifications.
- Hiring a Contractor and Down Payment Law. California Contractors State License Board (CSLB), retrieved May 25, 2026. cslb.ca.gov/consumers.
- Home Improvement Scams Targeting Older Adults. AARP Fraud Watch Network, June 2024. aarp.org/fraud-watch.