On the phone
Verify the license
Open cslb.ca.gov
Use the license lookup on the Contractors State License Board site.
Enter the number
Search by the license number you were given.
Match the name
The business name on the record should match the one you were told.
Check status and classification
Confirm the license is active and the classification fits plumbing work.
Before work starts
Before the plumber leaves
A note about this site
This checklist comes from the Fullerton Emergency Plumber preview site. Our phone number is a temporary placeholder, our request form is not connected yet, and our licensing details are not published yet, so run every item on this list with whoever you call, including us.
Common questions
Is a verbal quote enough?
A text or email confirming the scope and price is much better. It protects both you and the contractor.
What if I cannot check the license at night?
The CSLB lookup at cslb.ca.gov is available online any time and works on a phone.
Can I use this checklist for non-emergency work?
Yes. It works the same for planned repairs, with more time to compare estimates.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.