GroundRosterLicensed Well and Septic Contractors Based in Castro Valley, CA
6 licensed well and septic pros based in Castro Valley. Every license number below is sourced from official California records, with a link to verify it yourself.
"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works. Businesses based in nearby towns may also work here.
Need well or septic work quotes in Castro Valley? Request free quotes and we'll route your request to local well and septic pros.
Browse Castro Valley by service
Aaa Plumbing & Remodeling INCLicensed
OwenLicensed
Streamline Plumbing & Drain COLicensed
California GeotechLicensed
Bonetti Frank Plumbing INCLicensed
Hydro Works Well & Pump INCLicensed
Hiring a well and septic professional in Castro Valley
GroundRoster aggregates official state licensing rosters for water-well and septic (onsite wastewater) professionals into one searchable directory, refreshed regularly.
Before you sign anything: confirm the license number on this page is still active with California, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.