Best Licensed Low Voltage Contractors in South San Francisco, CA
8 low voltage companies registered in South San Francisco hold current CSLB licenses, verified against official records as of August 17, 2026. All 8 are listed below, ordered by workers' compensation cover and years licensed.
- 75 active C-7 low voltage systems licenses in San Mateo County; 8 registered in South San Francisco
- 7 of South San Francisco's 8 licenses (87.5%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in South San Francisco: 7 years
- Longest South San Francisco licensure: since 1992
- 10 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (650) 872-9322
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (650) 271-6436
- Verified
- August 17, 2026
- Licensed since
- 2017
- Phone
- (650) 684-7372
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (650) 347-5551
- Verified
- August 17, 2026
- Licensed since
- 2019
- Phone
- (650) 784-3837
- Verified
- August 17, 2026
- Licensed since
- 2024
- Phone
- (800) 653-8280
- Verified
- August 17, 2026
- Licensed since
- 2026
- Phone
- (650) 452-9456
- Verified
- August 17, 2026
- Licensed since
- 2025
- Phone
- (415) 910-2885
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Innovative Communications Inc. | #645712 | On file | 1992 |
| Firm Construction Company | #652070 | On file | 1992 |
| North Cal Security | #1030060 | On file | 2017 |
| Associated Electric & Security Inc. | #785565 | On file | 2000 |
| Oax Communications & Electric LLC | #1056151 | On file | 2019 |
| Apt Red LLC | #1120601 | On file | 2024 |
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, 8 of them registered in South San Francisco. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median South San Francisco license has been held 7 years, and the longest-standing one dates to 1992. 7 of South San Francisco's 8 licenses (87.5%) 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: 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 South San Francisco: common questions
How many licensed low voltage contractors are there in South San Francisco?
8 active C-7 low voltage systems licenses are registered in South San Francisco, out of 75 across San Mateo County. 8 South San Francisco-registered companies passed our license verification, and all 8 are listed on this page. 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. 8 active C-7 low voltage systems licenses are registered in South San Francisco and 75 across San Mateo County, the longest-standing issued in 1992. 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 7 of South San Francisco's 8 currently carry. 10 San Mateo County licenses expire within 90 days.
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