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Best Licensed Low Voltage Contractors in Brentwood, CA

11 low voltage companies registered in Brentwood 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 11 companies registered in Brentwood. 11 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.Connect Tek Of California Inc.

    ✓ CSLB License #765403 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1999
    Phone
    (925) 634-8475

  2. 2.Norcal Builders Inc.

    ✓ CSLB License #858617 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2005
    Phone
    (925) 679-8000

  3. 3.Bear Technology Inc.

    ✓ CSLB License #948362 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (925) 234-1531

  4. 4.Red Box Business Solutions Inc.

    ✓ CSLB License #977581 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2012
    Phone
    (925) 513-0000

  5. 5.Advance Telecom Inc.

    ✓ CSLB License #1031556 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2017
    Phone
    (510) 921-1149

  6. 6.G&b Lightwave LLC

    ✓ CSLB License #1097137 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2022
    Phone
    (925) 316-8484

  7. 7.Vega Consultants Inc.

    ✓ CSLB License #868747 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2005
    Phone
    (925) 516-8342

  8. 8.Precision Fiber Optics Inc.

    ✓ CSLB License #898594 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2007
    Phone
    (909) 921-9900

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Connect Tek Of California Inc.#765403On file1999
Norcal Builders Inc.#858617On file2005
Bear Technology Inc.#948362On file2010
Red Box Business Solutions Inc.#977581On file2012
Advance Telecom Inc.#1031556On file2017
G&b Lightwave LLC#1097137On file2022

Contra Costa 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: 124 active C-7 low voltage systems licenses in Contra Costa County, 11 of them registered in Brentwood. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Brentwood license has been held 17 years, and the longest-standing one dates to 1999. 6 of Brentwood's 11 licenses (54.5%) 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: 124 of the county's 124 licenses carry the same $25,000 bond California sets by statute. 8 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 Brentwood: common questions

How many licensed low voltage contractors are there in Brentwood?

11 active C-7 low voltage systems licenses are registered in Brentwood, out of 124 across Contra Costa County. 11 Brentwood-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. 11 active C-7 low voltage systems licenses are registered in Brentwood and 124 across Contra Costa County, the longest-standing issued in 1999. 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 6 of Brentwood's 11 currently carry. 8 Contra Costa County licenses expire within 90 days.

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