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Best Licensed Septic Contractors in Concord, CA

5 septic companies registered in Concord hold current CSLB licenses, verified against official records as of August 17, 2026. All 5 are listed below, ordered by workers' compensation cover and years licensed.

How we chose: We identified 5 companies registered in Concord. 5 passed license verification. All 5 are listed below. Our methodology

We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.

  1. 1.N V Heathorn Co

    ✓ CSLB License #761659 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1999
    Phone
    (510) 569-9100

  2. 2.U S T Testing Services Inc.

    ✓ CSLB License #866797 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2005
    Phone
    (925) 288-8944

  3. 3.Echo Plumbing And Rooter

    ✓ CSLB License #1033391 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2017
    Phone
    (925) 291-6119

  4. 4.All Water Heaters & Plumbing LLC

    ✓ CSLB License #1143044 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2025
    Phone
    (925) 301-7890

  5. 5.Guerra Bros Plumbing Inc.

    ✓ CSLB License #802256 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (925) 288-0409

Compare the top 5 at a glance

CompanyLicenseWorkers' compLicensed since
N V Heathorn Co#761659On file1999
U S T Testing Services Inc.#866797On file2005
Echo Plumbing And Rooter#1033391On file2017
All Water Heaters & Plumbing LLC#1143044On file2025
Guerra Bros Plumbing Inc.#802256Expired on file2001

Contra Costa County septic licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 44 active C-42 sanitation system licenses in Contra Costa County, 5 of them registered in Concord. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Concord license has been held 20 years, and the longest-standing one dates to 1999. 4 of Concord's 5 licenses (80.0%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 44 of the county's 44 licenses carry the same $25,000 bond California sets by statute. 3 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.

Septic Contractors in Concord: common questions

How many licensed septic contractors are there in Concord?

5 active C-42 sanitation system licenses are registered in Concord, out of 44 across Contra Costa County. 5 Concord-registered companies passed our license verification, and all 5 are listed on this page. Only licenses CSLB shows as CLEAR and unexpired are listed.

Does California license septic contractors?

Yes. California licenses contractors by classification, and C-42 is the CSLB classification that authorises this work. 5 active C-42 sanitation system licenses are registered in Concord and 44 across Contra Costa County, the longest-standing issued in 1999. Only CLEAR, unexpired licenses appear here.

How do I check a septic contractor's license in California?

Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which 4 of Concord's 5 currently carry. 3 Contra Costa County licenses expire within 90 days.

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