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Best Licensed Well Drilling Contractors in San Jose, CA

5 well drilling companies registered in San Jose 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 San Jose. 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.Exploration Geoservices Inc.

    ✓ CSLB License #484288 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1985
    Phone
    (408) 280-6822

  2. 2.Blaine Tech Services Inc.

    ✓ CSLB License #746684 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1998
    Phone
    (408) 573-0555

  3. 3.Ge Engineering Contractor

    ✓ CSLB License #1049882 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2019
    Phone
    (408) 297-1500

  4. 4.Preston Electric LLC

    ✓ CSLB License #1052786 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2019
    Phone
    (408) 262-1418

  5. 5.Welltest Inc.

    ✓ CSLB License #1100880 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (408) 460-1884

Compare the top 5 at a glance

CompanyLicenseWorkers' compLicensed since
Exploration Geoservices Inc.#484288On file1985
Blaine Tech Services Inc.#746684On file1998
Ge Engineering Contractor#1049882On file2019
Preston Electric LLC#1052786On file2019
Welltest Inc.#1100880On file2023

Santa Clara 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: 17 active C-57 well drilling licenses in Santa Clara County, 5 of them registered in San Jose. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Jose license has been held 7 years, and the longest-standing one dates to 1985. 5 of San Jose's 5 licenses (100.0%) 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: 16 of the county's 17 licenses carry the same $25,000 bond California sets by statute. 0 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 Jose: common questions

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

5 active C-57 well drilling licenses are registered in San Jose, out of 17 across Santa Clara County. 5 San Jose-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 well drilling contractors?

Yes. California licenses contractors by classification, and C-57 is the CSLB classification that authorises this work. 5 active C-57 well drilling licenses are registered in San Jose and 17 across Santa Clara County, the longest-standing issued in 1985. 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 5 of San Jose's 5 currently carry. 0 Santa Clara County licenses expire within 90 days.

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