Choosing a plumber is easier when you know what to check. In California, the Contractors State License Board (CSLB) publishes a short list of steps for hiring any contractor, and nearly all of them apply to plumbing. This checklist puts those steps in order, with notes on what they mean for plumbing and septic work in Santa Cruz County.
1. Check the license, not just the number
CSLB says to hire only licensed contractors and to look up the license online before you sign anything. A license number on a truck, ad or business card does not prove the license is current. When you look it up, check:
- Status. The license should be active, not expired or suspended.
- Classification. Plumbing work is the C-36 Plumbing classification. Septic tank and sewer work falls under C-42 Sanitation. Make sure the classification matches the job.
- Name and address. The business name and address of record should match the company you are talking to, and CSLB suggests checking that the person at your door matches the pocket license and ID.
Wade's Plumbing & Septic holds CSLB license #1087260 with the C-36 Plumbing and C-42 Sanitation classifications.
2. Confirm insurance
CSLB requires workers' compensation insurance for contractors with employees. Without it, CSLB warns, a homeowner can be liable for an injured worker's costs, and a homeowner's policy may not cover them. Ask for a certificate of insurance. General liability insurance, which covers property damage, is not required for most contractors. The exception is a contractor licensed as a limited liability company (LLC): CSLB says LLC licensees must carry liability insurance. Either way, a licensed contractor must state in the written contract whether they carry it, and you can check whether a license is held by an LLC in the CSLB lookup.
Wade's Plumbing & Septic is insured.
3. Get written bids for the same scope
For larger jobs, CSLB recommends at least three written bids based on the same plans and scope of work. Be cautious of a bid far below the others, which CSLB says can signal a mistake, missing work or lower quality materials. A good bid spells out:
- The work to be done and the materials or equipment to be installed
- Who pulls the permit, if one is needed
- What happens if the plumber finds something unexpected, such as a corroded line inside a wall
For smaller repairs, a single clear quote before the work starts is often enough. Ask whether the price is flat rate or hourly, so you know what can change.
4. Check references and reviews
CSLB suggests asking friends, neighbors, past customers and suppliers about a contractor's work, and checking with your local building department. Online reviews help most when you look for patterns: whether the plumber showed up when promised, explained the problem clearly and left the work area clean. A single bad review matters less than the same complaint repeated.
5. Put it in writing and keep payments in step
CSLB's advice on payments is simple:
- Sign a written contract only once you understand it
- Keep the down payment small. State law limits it to 10 percent of the contract price, with a cap, for most contractors
- Do not pay in cash, and do not let payments get ahead of the work
- Keep a file with the contract, change orders, permits and receipts
- Hold the final payment until the job is complete and you are satisfied
6. Ask about permits
Many plumbing jobs need a permit. In unincorporated Santa Cruz County, that includes replacing a water heater and installing or replacing fixtures, while clearing stoppages and repairing leaks without replacing parts are exempt. A licensed plumber should tell you whether your job needs a permit and who will get it. Our guide on calling a plumber or doing it yourself covers the permit rules in more detail.
Red flags
- No license, or a license that does not match the work or the company name
- Pressure to sign the same day or pay a large deposit up front
- Cash only, or no written quote
- A suggestion to skip a permit the job needs
Frequently asked questions
How do I check a plumber's license in California?
Use the license lookup on the CSLB website and enter the license number or business name. Check that the license is active and has the C-36 Plumbing classification for plumbing work.
Do plumbers need insurance in California?
Contractors with employees must carry workers' compensation insurance. General liability insurance is not required for most contractors, but contractors licensed as LLCs must carry it. In every case, the contract must say whether the contractor carries it.
How many quotes should I get?
CSLB recommends at least three written bids for larger projects, all based on the same scope of work.
How is pricing quoted at Wade's Plumbing & Septic?
Quotes are free and pricing is flat rate, quoted on site before work begins.
Sources
- Contractors State License Board, How do I find the right licensed contractor?
- Contractors State License Board, Limited Liability Company (LLC) Information
- Contractors State License Board, Ten Tips for Hiring a Contractor
- County of Santa Cruz Community Development and Infrastructure, When is a Plumbing Permit Required?
Need help with a plumbing project?
Wade's Plumbing & Septic handles drain cleaning, leak detection, water heaters and septic work across Santa Cruz County and nearby Santa Clara County communities. Quotes are free and pricing is flat rate, quoted on site before work begins. Request service or call during office hours, Monday to Friday, 9:00 AM to 5:00 PM.






