Low-voltage contractor (C-7) in Diamond Bar, CA
5 licenses · checked Oct 27, 2026
There are 5 Low-voltage contractor (C-7) licenses with an address of record in Diamond Bar, CA, in the CSLB License Master data checked Oct 27, 2026. That is 0.7% of the 754 such licenses statewide; Diamond Bar ranks #23 of 323 CA cities for this license type. They are spread across 2 ZIP codes; the most common are 91765 (4), 91789 (1). Most list Los Angeles County. By business type: Corporation 2, Sole Owner 2, Limited Liability 1. The median first-issue year is 2019; the oldest license dates from 2016. 2 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 Diamond Bar
Showing 5 of 5, A to Z. Listing order is alphabetical, not a recommendation.
- DUX Technology Consulting INC#1050592 · 91789
- Haitao Feng#1061261 · 91765
- ION Security Systems#1015479 · 91765
- K3Gs LLC#1064281 · 91765
- THM Associates INC#1052347 · 91765
Frequently asked questions
How many Low-voltage contractor (C-7) licenses are in Diamond Bar?
5 active licenses in the CSLB License Master data checked Oct 27, 2026 (0.7% 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 Diamond Bar?
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 Diamond Bar Low-voltage contractor (C-7) licenses expire soon?
2 of 5 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 Diamond Bar
General building contractor (29) · Electrical contractor (C-10) (7) · HVAC contractor (C-20) (4)
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.