Licensed Septic Companies in Concord, CA
5 septic companies serve Concord, California, and 5 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 Concord
Guides: Septic system installation · Septic inspection · Installation cost · Pumping cost
5 septic companies in Concord
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All Water Heaters & Plumbing LLC
3375 Port Chicago Hwy Ste 15Unit 1180, Concord, CA 94520 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #1143044 (California Contractors State License Board, verify)
Per state license: Installation
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Echo Plumbing & Rooter
4180 Treat Blvd Suite P, Concord, CA 94518 · Contra Costa County
- Licensed: California Licensed Contractor (C36, C42) · #1033391 (California Contractors State License Board, verify)
From their website: Inspection Per state license: Installation
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Guerra Bros. Plumbing, Inc.
100 Medburn St Ste B, Concord, CA 94520 · Contra Costa County
- Licensed: California Licensed Contractor (A, C36, C42) · #802256 (California Contractors State License Board, verify)
From their website: Inspection · Grease traps Per state license: Installation
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N V Heathorn Co
1980 Olivera Rd Ste C, Concord, CA 94520 · Contra Costa County
- Licensed: California Licensed Contractor (A, B, C-2, C-4, C-7, C10, C16, C20, C21, C34, C36, C38, C39, C42, C43, C46) · #761659 (California Contractors State License Board, verify)
Per state license: Installation
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U S T Testing Services Inc
1635 Challenge Drive, Concord, CA 94520 · Contra Costa County
- Licensed: California Licensed Contractor (A, B, C-4, C12, C16, C20, C34, C36, C38, C42, C43, C60) · #866797 (California Contractors State License Board, verify)
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 Concord and whether the permit fee is in their quote.
California septic licensing: agencies, license types and how to check a license →
Septic companies in Concord: common questions
How many licensed septic companies are in Concord, CA?
5 septic companies serve Concord, California, and 5 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 Concord?
5 listings in Concord 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.