Licensed Well and Septic Contractors: Alameda County, CA

84 licensed well and septic pros based in Alameda County. Every license number below is sourced from public licensing records, with a link to look it up yourself.

Grouped by the county of the address on each license record, which can be a mailing address, so it doesn't tell you where the business works. When the record names no county, we place it by ZIP code, then town.

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

Towns in Alameda County

All 13 towns named on the license records based here, with the number of listings in each, most first.

License classes on the Alameda County records

Each class as the issuing agency prints it on the license record. A record that names more than one class counts once under each, so the rows can add up to more than 84.

Septic Contractors based in Alameda County (72)

Water Well Contractors based in Alameda County (12)

Own one of these businesses? Find your listing and claim it.

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

Services in Alameda County, with national cost ranges

Listings based in Alameda County whose license class covers each service. Cost ranges are national; each links its cost guide.

None of the listings based in Alameda County hold a license class we can match to septic tank pumping, septic inspection, septic system design, perc test and soil evaluation or well pump repair. Ask any contractor whether they do this work, or try a nearby city.

Hiring a well and septic professional in Alameda County

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.

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

Neighboring counties