Plumber Hiring Checklist for Drain and Sewer Line Work

Before they arrive

Got the company's full business name
Got the CSLB license number
Looked it up at cslb.ca.gov: active, name matches, covers plumbing
Confirmed my Cypress address is in their service area
Asked how the job is priced and whether there is a trip or diagnostic charge
Asked whether they bring a camera

At the house, before work starts

Plumber explained what they think the cause is
Access point and method agreed (cleanout, toilet, fixture)
Written price or written pricing method received
Agreed what happens if the first attempt fails
Asked whether employees or subcontractors are doing the work

After the work

Several fixtures run to confirm the line is clear
Cause explained in plain words
Camera footage reviewed and copy requested, if a camera was used
Any repair recommendation received in writing
Invoice shows the business name and license number

Red flags and what to do

Red flag	What to do
Will not give a license number	Do not hire until you can verify it
License name does not match the business	Ask why; verify at cslb.ca.gov
Price jumps once inside with no clear reason	Ask for the change in writing, or stop
Urgent push for a big repair without footage	Ask to see the footage and take time to decide
Large payment demanded before work	Ask for written payment terms; see cslb.ca.gov guidance

If a large repair is recommended

What exactly is wrong, and where?
What are all the options, including the least invasive one?
Does it need a permit, and will you obtain it?
Can I have the footage and the estimate to get a second opinion?

Common questions

Is it rude to ask for a license number?

No. Licensed contractors expect it, and checking it is a normal part of hiring in California.

What if the license check shows a complaint?

Read the details on the CSLB site and decide for yourself; ask the contractor about it if it concerns you.

Should I use this checklist with you too?

Yes. This is a preview site for Cypress Drain Cleaning, and licensing details will be published once confirmed. Use this checklist with whichever contractor you choose, including us.

General information for Cypress, not a quote or professional advice. In an emergency, call 911.