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Licensed Low Voltage Contractors in Livermore, California

Updated November 1, 2026 from CSLB's public license file · C-7 Low Voltage Systems Contractor

  • 34licensed low voltage contractors
  • 33active (Clear)
  • 2.9%with a suspension
  • 23.5%workers' comp exempt
  • 14.8 yrsmedian time licensed
  • 79.4%corp / LLC / partnership (20.6% sole owner)
  • 0new in the last 12 months
  • —change tracking began November 1, 2026

There are 34 low voltage contractors based in Livermore in CSLB's current file. 33 (97.1%) have a Clear status as of November 1, 2026.

The share with a suspension, 2.9%, is 4.7 points lower than the Alameda County rate for the same license (7.6%). 23.5% report a workers' comp exemption, 17.3 points lower than the statewide figure for low voltage contractors (40.8%), so many of these businesses say they have no employees.

The median low voltage contractor here has held a license for 14.8 years (more than the statewide median of 14.4), and 0 licenses were issued in the last 12 months.

In California this work generally calls for the C-7 Low Voltage Systems Contractor license (or a B license when it is part of a larger multi-trade job). See the C-7 Low Voltage Systems Contractor guide for what the license covers.

How to check a low voltage contractor's license in Livermore

  1. Open the low voltage contractor's profile from the table below (or search Livermore listings by name). Check that C-7 appears among its classifications and that the primary status reads Clear. What C-7 covers.
  2. Confirm it live with CSLB's Instant License Check. Statuses change between our weekly refreshes, especially workers' comp and bond suspensions.
  3. Get the bid and contract in writing with the license number on it. If the job tops $1,000 in labor and materials, a licensed low voltage contractor is required by law. See the $1,000 rule.

All 34 low voltage contractors in Livermore

Livermore low voltage contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed low voltage contractors in Livermore
Business nameLicense #StatusYearsWorkers' compBond
Red Top Electric CO Emeryville INC 187698 Clear 67 Insured On file
All-Guard Alarm Systems INC 398874 Clear 45 Insured On file
Laser Security Systems INC 404142 Clear 45 Insured On file
Ezell's Telephone Company, E-Z Tel INC 452985 Clear 42 Insured On file
Sound & Signal INC 494676 Clear 40 Insured On file
Trojan Systems INC 637942 Clear 34 Insured On file
Tennyson Electric LLC 717998 Clear 30 Insured On file
Point One Electrical Systems INC 745827 Clear 28 Insured On file
Ams.net LLC 763508 Clear 27 Insured On file
Space Age Satellite 813932 Clear 24 Exempt On file
E D T Tec INC 830873 Clear 22 Insured On file
Three Alarm Fire Protection 884552 Clear 20 Insured On file
Professional Telecommunications Services INC 900567 Clear 19 Insured On file
Three Alarm Electrical Systems INC 944907 Clear 16 Insured On file
Bay Area Security Specialists INC 950344 Clear 16 Insured On file
Ccs 957965 Clear 15 Exempt On file
Nu Rev Communications INC 962583 Clear 15 Insured On file
Top Tier Communication 976279 Clear 14 Exempt On file
Ag Security Services INC 982618 Clear 13 Insured On file
Network Cabling Company 982852 Clear 13 Exempt On file
Elb Us INC. 989518 Clear 12 Insured On file
Cmjn Avt 993859 Clear 12 Exempt On file
Uplink Cabling 1021668 Clear 9 Exempt On file
Stewart Ryan Communications 1023491 Clear 9 Insured On file
Mycom Communications INC 1028507 Clear 9 Insured On file
Direct Current Systems 1037185 Clear 8 Insured On file
Summit A V & Automation INC 1055563 Clear 7 Exempt On file
Purus INC 1059782 Clear 7 Insured On file
Structure Net INC 1064400 Clear 6 Insured On file
Alantec Corrosion Control INC 1077722 Clear 5 Insured On file
Martins Communications 1103816 Clear 3 Exempt On file
Menlo Technology Services 1123689 Clear 2 Insured On file
Cabre Tech Solutions INC 1141924 Clear 1 Insured On file
Telcom Structured Cabling LLC 986647 Susp: liability insurance 13 Insured On file

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed low voltage contractors are in Livermore?

CSLB's current public file lists 34 low voltage contractors with a Livermore mailing address. 33 have a Clear status, and 85.3% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a low voltage contractor need in California?

Look for C-7 on the license. 34 businesses in Livermore hold it. Small jobs under $1,000 with no permit and no employees are exempt; everything else needs a license (details).

How do I check a low voltage contractor's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Livermore, 76.5% of low voltage contractors list a policy, 23.5% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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