Every contractor horror story you have heard started the same way: nobody checked. The good news is that California gives homeowners real tools to vet a contractor, and using them takes about ten minutes. Here is the list we would give our own family.

Look up the license first

Every legitimate contractor in California carries a CSLB license, and you can check it free at the Contractors State License Board website, cslb.ca.gov. Search by the license number or business name and look at three things:

• The license is active, not suspended or expired.
• The classification matches the work. A B classification covers general building work like remodels.
• The bond is current and any workers' compensation requirement is met.

While you are there, check for disciplinary actions. It is all public.

Ask for proof of insurance

Liability insurance protects your house. Workers' compensation protects you if someone gets hurt on your property. Ask for certificates for both and do not accept "we're covered" as an answer. If an uninsured worker is injured at your home, that claim can land on you.

Know the deposit rule

California law caps the down payment on a home improvement contract at 10 percent of the contract price or $1,000, whichever is less. A contractor asking for a third or half of the job up front is either unaware of the law or ignoring it. Neither is a good sign.

Get it in writing

State law requires a written contract for home improvement jobs over $500. A real contract spells out the scope of work, the price, the payment schedule tied to work completed, start and completion dates, and how changes get handled. If it is vague, the disputes later will not be.

Talk to real references

Ask for two or three recent clients with projects like yours and actually call them. Ask what went wrong on the job. Something always does, and how the contractor handled it tells you more than a five-star review.

Red flags that end the conversation

• No license number on the card, truck, website, or contract. Contractors are required to display it.
• Pressure to sign today for a special price.
• A bid dramatically lower than everyone else's. The difference reappears as change orders.
• Asking you to pull the permit as an owner-builder.
• Cash only.

Where we stand

Our license is CSLB #1138940, and you can look it up right now at cslb.ca.gov. We would rather you check us and everyone else you talk to. The contractors who earn work honestly have nothing to hide, and the ten minutes you spend checking is the cheapest insurance a remodel can buy.