Five checks, in order
- License.Ask for the California contractor license number. Look it up at cslb.ca.gov and confirm it is active, the business name matches, and the classification covers plumbing.
- Who does the work.Ask whether the person coming is an employee or a subcontractor and whose license covers the job.
- Scope in writing.What exactly will be done, with what materials, and what is not included, such as drywall patching or concrete.
- Price in writing.Get the price before work starts, and ask how changes are handled if they find something unexpected.
- Permits.Ask whether the job needs a permit in your city and who will pull it. Check with the city if unsure.
Tick these off
- License number written down and checked at cslb.ca.gov
- Business name on the license matches the quote
- Written scope of work
- Written price and payment terms
- Permit responsibility agreed
- Warranty terms in writing, if any are offered
- Cleanup and haul-away addressed
- You understand how changes to the job will be approved
Good signs and warning signs
Good signs
- Gives the license number without hesitation
- Explains what they found and shows you
- Offers options, not just the biggest job
- Puts everything in writing
Warning signs
- Avoids the license question
- Pushes a large job before diagnosing
- Wants a large cash payment upfront
- Says permits are never needed
Questions to ask on the phone
- Do you work at my address?
- How do you charge for the visit and diagnosis?
- Do you do this type of job regularly?
- Will you camera the line or test before recommending replacement?
- Can I see photos or video of what you find?
A note for North OC homeowners
Because so many homes here share the same age and construction, contractors may arrive with a ready-made answer: repipe, reline, replace the heater. Sometimes that answer is right. A good contractor still shows you why it applies to your house, using the camera footage, test results or the condition of the pipe in front of you.
Common questions
What does a CSLB lookup show?
Whether the license is active, the business name, the classification, and related information the state publishes. Use it every time.
Do I need multiple quotes?
For emergencies, often not; stop the damage first. For planned work like a repipe or sewer replacement, two or three written quotes are sensible.
Is a verbal price enough?
Get it in writing before work starts, even if it is a short text or email.
General information for North Orange County, not a quote or professional advice. In an emergency, call 911.