Licensed Septic Companies in Antioch, CA
6 septic companies serve Antioch, California, and 6 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026).
Septic services in Antioch
Guides: Septic system installation · Septic inspection · Installation cost · Pumping cost
6 septic companies in Antioch
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Cali Plumbing & Rooter LLC
1313 W 18Th St, Antioch, CA 94509 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #1141194 (California Contractors State License Board, verify)
Per state license: Installation
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Drain Doctors And Plumbers
909 Almond Street, Antioch, CA 94509 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #944651 (California Contractors State License Board, verify)
Per state license: Installation
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Drainman Pro Inc
P O Box 756, Antioch, CA 94509 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #881542 (California Contractors State License Board, verify)
Per state license: Installation
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In Demand Plumbing Heating & Air
729 Fulton Shipyard Roadsuite A1, Antioch, CA 94509 · Contra Costa County
- Licensed: California Licensed Contractor (C20, C34, C36, C42) · #943549 (California Contractors State License Board, verify)
From their website: Inspection Per state license: Installation
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Royal Rooter
5239 Delta View Way, Antioch, CA 94531 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #862460 (California Contractors State License Board, verify)
Per state license: Installation
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Service Pros Plumbers, Inc.
126 Railroad Ave, Antioch, CA 94509 · Contra Costa County
- Licensed: California Licensed Contractor (C34, C36, C42) · #979455 (California Contractors State License Board, verify)
From their website: Inspection Per state license: Installation
No listings match those filters.
Septic licensing in California
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The Contractors State License Board (CSLB) issues these credentials: C-42 Sanitation System contractor license.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Antioch and whether the permit fee is in their quote.
California septic licensing: agencies, license types and how to check a license →
Septic companies in Antioch: common questions
How many licensed septic companies are in Antioch, CA?
6 septic companies serve Antioch, California, and 6 of them hold a California septic license or certification matched to the California Contractors State License Board list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in California?
California has no license named for septic work; septic systems fall under the C-42 Sanitation System classification. Counties issue system permits. The licensing body is the Contractors State License Board (CSLB).
Which companies install septic systems in Antioch?
6 listings in Antioch install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their California license.
How do I check a septic contractor's license in California?
Use the Contractors State License Board (CSLB)'s lookup (https://www.cslb.ca.gov/onlineservices/checklicenseII/checklicense.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.