Plumbing, tile and drywall are different jobs
A cartridge swap or spout replacement is a plumbing job start to finish. A valve replacement, pan rebuild or leak behind the wall usually also involves cutting and restoring drywall or tile and sometimes waterproofing. Not every plumber does that finish work, so it is worth knowing up front who will.
In California, contractors doing this kind of work are licensed by the Contractors State License Board. You can look up any license number at cslb.ca.gov to confirm it is active and matches the business you are dealing with.
Before you agree to anything
- Get the contractor's CSLB license number and check it at cslb.ca.gov
- Ask whether employees or subcontractors will do the work
- Ask what testing they did and what it showed
- Get the scope and price in writing before work starts
- Confirm who restores drywall, tile and paint, and whether that is included
- Ask whether a permit is needed and who will pull it
Comparing quotes
| Check in each quote | Why it matters |
|---|---|
| The exact part or valve being installed | A cartridge swap and a new valve are different jobs |
| Whether the wall or floor is opened, and where | Opening size drives restoration work |
| Who restores tile, drywall and paint | Often the biggest difference between quotes |
| What happens if hidden damage is found | Avoids surprises once the wall is open |
| Whether a permit is included | Shifts responsibility and cost |
| Testing before closing up | Confirms the repair before it is hidden |
When a second opinion is reasonable
- IfA full shower tear-out is proposed for a dripThenAsk why a cartridge or valve repair won't work, and consider another opinion.
- IfNo testing was done before a large repair was recommendedThenAsk for the source to be confirmed first.
- IfThe price isn't in writingThenWait until it is.
- IfThe license number doesn't check out at cslb.ca.govThenDon't proceed.
Questions to ask any plumber
- What is your CSLB license number?
- How will you confirm the source of the leak before opening anything?
- What exactly is included in your written price?
- Who restores the wall or floor afterward?
- Will you test the repair before the wall is closed?
Common questions
Does a small shower repair need a licensed contractor?
California has rules on when a license is required based on the job. Checking a license at cslb.ca.gov is a simple step either way.
Can I send you my shower repair details?
Yes, through the request form, but this is a preview site: the form is not connected yet, so a submission is not sent anywhere, and the phone number shown is a temporary placeholder.
What should a written quote include?
The work, the parts, any opening and restoration, permit handling and what happens if hidden damage is found.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.