Low-voltage contractor (C-7) in San Francisco, CA
8 licenses · checked Oct 27, 2026
There are 8 Low-voltage contractor (C-7) licenses with an address of record in San Francisco, CA, in the CSLB License Master data checked Oct 27, 2026. That is 1.1% of the 754 such licenses statewide; San Francisco ranks #13 of 323 CA cities for this license type. They are spread across 8 ZIP codes; the most common are 94122 (1), 94110 (1), 94112 (1). Most list San Francisco County. By business type: Corporation 7, Sole Owner 1. The median first-issue year is 2017; the oldest license dates from 2015. 6 of them come up for renewal or expiration in the next 12 months, so re-check status before you sign a contract.
What a Low-voltage contractor (C-7) license covers
Low Voltage Systems (C-7) covers communications, alarm, voice, data and similar systems up to 91 volts.
How to verify a license
Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Official lookup: CSLB Instant License Check.
Low-voltage contractor (C-7) licenses in San Francisco
Showing 8 of 8, A to Z. Listing order is alphabetical, not a recommendation.
- Actnet Advanced Technology Corporation#1034034 · 94122
- Blackwell INC#1020112 · 94110
- Blue Wood Construction INC#1008141 · 94112
- Data Path INC#1041107 · 94104
- Digital Disclosure#1053488 · 94115
- Foxtron Security INC#1022308 · 94124
- Optical Communications Corporation#1053400 · 94103
- Tech Hospitality INC#1057457 · 94102
Frequently asked questions
How many Low-voltage contractor (C-7) licenses are in San Francisco?
8 active licenses in the CSLB License Master data checked Oct 27, 2026 (1.1% of CA).
What does a Low-voltage contractor (C-7) license cover?
Low Voltage Systems (C-7) covers communications, alarm, voice, data and similar systems up to 91 volts.
How do I verify a Low-voltage contractor (C-7) license in San Francisco?
Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Use the license number shown here with the CSLB Instant License Check.
How many San Francisco Low-voltage contractor (C-7) licenses expire soon?
6 of 8 have an expiration date in the next 12 months. A license that lapses must be renewed before the holder can work under it again.
Other license types in San Francisco
General building contractor (324) · Plumbing contractor (C-36) (63) · Electrical contractor (C-10) (57) · Painting contractor (C-33) (49) · General engineering contractor (41) · Landscaping contractor (C-27) (18) · Roofing contractor (C-39) (17) · Flooring contractor (C-15) (12) · Tile contractor (C-54) (12) · Glazing contractor (C-17) (10) · HVAC contractor (C-20) (9) · Fire protection contractor (C-16) (7)
All Low-voltage contractor (C-7) licenses in CA →
Source: CSLB License Master. Licensed California is independent and not affiliated with the licensing agency. Data checked Oct 27, 2026.