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Best Licensed Solar Contractors in Livermore, CA

5 solar companies registered in Livermore 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 Livermore. 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.Robert James Cortez

    ✓ CSLB License #606942 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1990
    Phone
    (925) 455-0720

  2. 2.Eagle Air

    ✓ CSLB License #668002 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1993
    Phone
    (925) 443-2665

  3. 3.Deharo Construction Inc.

    ✓ CSLB License #683104 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1993
    Phone
    (925) 606-8634

  4. 4.Gress Heating & Air Inc.

    ✓ CSLB License #789682 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (925) 872-6497

  5. 5.All On Electric Inc.

    ✓ CSLB License #944973 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (925) 447-0581

Compare the top 5 at a glance

CompanyLicenseWorkers' compLicensed since
Robert James Cortez#606942On file1990
Eagle Air#668002On file1993
Deharo Construction Inc.#683104On file1993
Gress Heating & Air Inc.#789682On file2001
All On Electric Inc.#944973On file2010

Alameda County solar licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 40 active C-46 solar licenses in Alameda County, 5 of them registered in Livermore. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Livermore license has been held 32 years, and the longest-standing one dates to 1990. 5 of Livermore'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: 40 of the county's 40 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.

Solar Contractors in Livermore: common questions

How many licensed solar contractors are there in Livermore?

5 active C-46 solar licenses are registered in Livermore, out of 40 across Alameda County. 5 Livermore-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 solar contractors?

Yes. California licenses contractors by classification, and C-46 is the CSLB classification that authorises this work. 5 active C-46 solar licenses are registered in Livermore and 40 across Alameda County, the longest-standing issued in 1990. Only CLEAR, unexpired licenses appear here.

How do I check a solar 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 Livermore's 5 currently carry. 2 Alameda County licenses expire within 90 days.

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