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Best Licensed Low Voltage Contractors in Livermore, CA

27 low voltage companies registered in Livermore 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 27 companies registered in Livermore. 27 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.Red Top Electric Co Emeryville Inc.

    ✓ CSLB License #187698 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1959
    Phone
    (925) 667-2900

  2. 2.All-guard Alarm Systems Inc.

    ✓ CSLB License #398874 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1981
    Phone
    (800) 255-4273

  3. 3.Laser Security Systems Inc.

    ✓ CSLB License #404142 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1981
    Phone
    (925) 245-9019

  4. 4.Ezell's Telephone Company, E-z Tel Inc.

    ✓ CSLB License #452985 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1984
    Phone
    (925) 449-1504

  5. 5.Sound & Signal Inc.

    ✓ CSLB License #494676 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1986
    Phone
    (925) 455-1778

  6. 6.Trojan Systems Inc.

    ✓ CSLB License #637942 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1992
    Phone
    (925) 245-1510

  7. 7.Tennyson Electric LLC

    ✓ CSLB License #717998 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1996
    Phone
    (925) 606-1038

  8. 8.Point One Electrical Systems Inc.

    ✓ CSLB License #745827 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1998
    Phone
    (925) 667-2950

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Red Top Electric Co Emeryville Inc.#187698On file1959
All-guard Alarm Systems Inc.#398874On file1981
Laser Security Systems Inc.#404142On file1981
Ezell's Telephone Company, E-z Tel Inc.#452985On file1984
Sound & Signal Inc.#494676On file1986
Trojan Systems Inc.#637942On file1992

Alameda County low voltage licensure at a glance

California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 155 active C-7 low voltage systems licenses in Alameda County, 30 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 13 years, and the longest-standing one dates to 1959. 19 of Livermore's 30 licenses (63.3%) 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: 155 of the county's 155 licenses carry the same $25,000 bond California sets by statute. 14 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.

Low Voltage Contractors in Livermore: common questions

How many licensed low voltage contractors are there in Livermore?

30 active C-7 low voltage systems licenses are registered in Livermore, out of 155 across Alameda County. 27 Livermore-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 low voltage contractors?

Yes. California licenses contractors by classification, and C-7 is the CSLB classification that authorises this work. 30 active C-7 low voltage systems licenses are registered in Livermore and 155 across Alameda County, the longest-standing issued in 1959. Only CLEAR, unexpired licenses appear here.

How do I check a low voltage 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 19 of Livermore's 30 currently carry. 14 Alameda County licenses expire within 90 days.

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