Licensed Well and Septic Contractors in California

California lists 1,576 licensed well and septic contractors: 650 well drillers and pump installers and 944 septic contractors, including 18 who hold both. They are based in 54 counties and 542 cities. 3 license classes appear, covering installation / repair and drilling / construction.

Checked against California Contractors State License Board (CSLB). Roster copy last refreshed 2026-08-17.

Browse by county or request free quotes.

Counties with the most listings based there

All 54 counties

Browse California by county

Each listing sits under the county of the address on its license record, which can be a mailing address. 54 counties have listings based there.

Cities with the most listings based there

Septic Installers by city in California

Septic System Installation cost guide

Well Drillers by city in California

Well Drilling cost guide

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Looking for a specific contractor? Search by name, business name, or license number.

Hiring a well and septic professional in California

Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.

How do I check a well and septic professional's license in California?

Use the license search to find the listing by name, business name, or license number, then confirm it with the agency that issued the license. Every listing links to the roster it came from.

What does well or septic work cost in California?

Our cost guides give national ranges for well drilling, well pump repair, septic tank pumping, septic cleaning, repairs, and inspections. Site conditions, access, and local demand set the real number, so get at least three written quotes from licensed well and septic pros in California.

Is a permit required?

Usually, for a new system or well and for most repairs, and the rules are set by the state or the county. Our California permit guide covers who issues them and what they cover.

Permits and California agency resources

Do I need a permit for well or septic work in California? ›

• California CSLB - Contractor License Search
• California SWRCB - Onsite Wastewater Treatment Systems (OWTS)
• California DWR - Well Completion Reports

Where this California data comes from

• California Contractors State License Board (CSLB) · source page