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Best Licensed Septic Contractors in Santa Rosa, CA

10 septic companies registered in Santa Rosa hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.

How we chose: We identified 10 companies registered in Santa Rosa. 10 passed license verification. The 8 below are the top-ranked of those. 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.Drew Underground Construction

    ✓ CSLB License #484067 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1985
    Phone
    (707) 849-0804

  2. 2.Ghilotti Construction Company Inc.

    ✓ CSLB License #644515 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1992
    Phone
    (707) 585-1221

  3. 3.Bdk Septic Service

    ✓ CSLB License #802125 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (707) 570-2270

  4. 4.Maverick Excavating Inc.

    ✓ CSLB License #1041206 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2018
    Phone
    (707) 975-4911

  5. 5.Moore Home Services

    ✓ CSLB License #1051850 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2019
    Phone
    (707) 243-2250

  6. 6.Austin Creek Services Inc.

    ✓ CSLB License #1054040 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2019
    Phone
    (707) 545-5550

  7. 7.Neighbor Homes

    ✓ CSLB License #357397 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1978
    Phone
    (707) 696-3499

  8. 8.Russian River Septic & Wine Waste

    ✓ CSLB License #1073817 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2021
    Phone
    (707) 308-5388

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Drew Underground Construction#484067On file1985
Ghilotti Construction Company Inc.#644515On file1992
Bdk Septic Service#802125On file2001
Maverick Excavating Inc.#1041206On file2018
Moore Home Services#1051850On file2019
Austin Creek Services Inc.#1054040On file2019

Sonoma County septic licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 25 active C-42 sanitation system licenses in Sonoma County, 10 of them registered in Santa Rosa. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Santa Rosa license has been held 7 years, and the longest-standing one dates to 1978. 6 of Santa Rosa's 10 licenses (60.0%) 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: 25 of the county's 25 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 Santa Rosa: common questions

How many licensed septic contractors are there in Santa Rosa?

10 active C-42 sanitation system licenses are registered in Santa Rosa, out of 25 across Sonoma County. 10 Santa Rosa-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. 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. 10 active C-42 sanitation system licenses are registered in Santa Rosa and 25 across Sonoma County, the longest-standing issued in 1978. 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 6 of Santa Rosa's 10 currently carry. 3 Sonoma County licenses expire within 90 days.

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