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Best Licensed Solar Contractors in Long Beach, CA

12 solar companies registered in Long Beach 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 12 companies registered in Long Beach. 12 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.Cornerstone Technologies Inc.

    ✓ CSLB License #749743 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1998
    Phone
    (562) 494-9465

  2. 2.Nd Construction Company Inc.

    ✓ CSLB License #779970 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2000
    Phone
    (562) 246-6190

  3. 3.Solar Source Inc.

    ✓ CSLB License #925231 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2008
    Phone
    (562) 852-5626

  4. 4.All Solar

    ✓ CSLB License #964957 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2011
    Phone
    (562) 619-4770

  5. 5.Castleberry Home Improvements Inc.

    ✓ CSLB License #968426 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2011
    Phone
    (310) 291-3807

  6. 6.Dougals G Schmitz Inc.

    ✓ CSLB License #1109286 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (562) 357-2151

  7. 7.Terrasun Energy Services LLC

    ✓ CSLB License #1151024 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2026
    Phone
    (714) 768-3903

  8. 8.C E S N Construction Inc.

    ✓ CSLB License #701425 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1995
    Phone
    (619) 944-1689

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Cornerstone Technologies Inc.#749743On file1998
Nd Construction Company Inc.#779970On file2000
Solar Source Inc.#925231On file2008
All Solar#964957On file2011
Castleberry Home Improvements Inc.#968426On file2011
Dougals G Schmitz Inc.#1109286On file2023

Los Angeles County solar licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 179 active C-46 solar licenses in Los Angeles County, 12 of them registered in Long Beach. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Long Beach license has been held 14 years, and the longest-standing one dates to 1995. 7 of Long Beach's 12 licenses (58.3%) 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: 179 of the county's 179 licenses carry the same $25,000 bond California sets by statute. 20 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 Long Beach: common questions

How many licensed solar contractors are there in Long Beach?

12 active C-46 solar licenses are registered in Long Beach, out of 179 across Los Angeles County. 12 Long Beach-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 solar contractors?

Yes. California licenses contractors by classification, and C-46 is the CSLB classification that authorises this work. 12 active C-46 solar licenses are registered in Long Beach and 179 across Los Angeles County, the longest-standing issued in 1995. 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 7 of Long Beach's 12 currently carry. 20 Los Angeles County licenses expire within 90 days.

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