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Best Licensed Well Drilling Contractors in San Diego, CA

4 well drilling companies registered in San Diego hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by workers' compensation cover and years licensed.

How we chose: We identified 4 companies registered in San Diego. 4 passed license verification. All 4 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.Kleinfelder Inc.

    ✓ CSLB License #467252 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1984
    Phone
    (619) 831-4600

  2. 2.Pacific Drilling Co

    ✓ CSLB License #681380 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1993
    Phone
    (619) 294-3682

  3. 3.Geocon Consultants Inc.

    ✓ CSLB License #716050 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1995
    Phone
    (925) 371-5900

  4. 4.Tri-county Drilling Inc.

    ✓ CSLB License #547737 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1988
    Phone
    (858) 271-0099

Compare the top 4 at a glance

CompanyLicenseWorkers' compLicensed since
Kleinfelder Inc.#467252On file1984
Pacific Drilling Co#681380On file1993
Geocon Consultants Inc.#716050On file1995
Tri-county Drilling Inc.#547737Exempt or none on file1988

San Diego County well drilling licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 29 active C-57 well drilling licenses in San Diego County, 4 of them registered in San Diego. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Diego license has been held 32 years, and the longest-standing one dates to 1984. 3 of San Diego's 4 licenses (75.0%) 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: 29 of the county's 29 licenses carry the same $25,000 bond California sets by statute. 2 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.

Well Drilling Contractors in San Diego: common questions

How many licensed well drilling contractors are there in San Diego?

4 active C-57 well drilling licenses are registered in San Diego, out of 29 across San Diego County. 4 San Diego-registered companies passed our license verification, and all 4 are listed on this page. Only licenses CSLB shows as CLEAR and unexpired are listed.

Does California license well drilling contractors?

Yes. California licenses contractors by classification, and C-57 is the CSLB classification that authorises this work. 4 active C-57 well drilling licenses are registered in San Diego and 29 across San Diego County, the longest-standing issued in 1984. Only CLEAR, unexpired licenses appear here.

How do I check a well drilling 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 3 of San Diego's 4 currently carry. 2 San Diego County licenses expire within 90 days.

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