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Best Licensed Low Voltage Contractors in San Mateo, CA

14 low voltage companies registered in San Mateo 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 14 companies registered in San Mateo. 14 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.Tony Dudley Communications Inc. DBA T D Communications Inc.

    ✓ CSLB License #754119 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1998
    Phone
    (650) 342-4741

  2. 2.Opus Pacific Development Inc.

    ✓ CSLB License #801858 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2001
    Phone
    (650) 788-5368

  3. 3.H M W Development Inc.

    ✓ CSLB License #822005 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2003
    Phone
    (415) 806-8992

  4. 4.Jl Integrated

    ✓ CSLB License #949712 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2010
    Phone
    (650) 349-4737

  5. 5.Assure Msp Low Voltage

    ✓ CSLB License #1107485 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2023
    Phone
    (888) 410-4888

  6. 6.Electrovation

    ✓ CSLB License #435675 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1983
    Phone
    (650) 766-6529

  7. 7.Essa Network Inc.

    ✓ CSLB License #656827 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    1992
    Phone
    (408) 595-0343

  8. 8.R N R Electrical Inc.

    ✓ CSLB License #837858 - look up this number at CSLB
    Verified
    August 17, 2026
    Licensed since
    2004
    Phone
    (650) 288-1384

Compare the top 6 at a glance

CompanyLicenseWorkers' compLicensed since
Tony Dudley Communications Inc. DBA T D Communications Inc.#754119On file1998
Opus Pacific Development Inc.#801858On file2001
H M W Development Inc.#822005On file2003
Jl Integrated#949712On file2010
Assure Msp Low Voltage#1107485On file2023
Electrovation#435675Exempt or none on file1983

San Mateo 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: 75 active C-7 low voltage systems licenses in San Mateo County, 14 of them registered in San Mateo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Mateo license has been held 18 years, and the longest-standing one dates to 1983. 5 of San Mateo's 14 licenses (35.7%) 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: 74 of the county's 75 licenses carry the same $25,000 bond California sets by statute. 10 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 San Mateo: common questions

How many licensed low voltage contractors are there in San Mateo?

14 active C-7 low voltage systems licenses are registered in San Mateo, out of 75 across San Mateo County. 14 San Mateo-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. 14 active C-7 low voltage systems licenses are registered in San Mateo and 75 across San Mateo County, the longest-standing issued in 1983. 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 5 of San Mateo's 14 currently carry. 10 San Mateo County licenses expire within 90 days.

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