Best Licensed Low Voltage Contractors in Concord, CA
26 low voltage companies registered in Concord 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.
- 124 active C-7 low voltage systems licenses in Contra Costa County; 28 registered in Concord
- 16 of Concord's 28 licenses (57.1%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Concord: 16 years
- Longest Concord licensure: since 1993
- 8 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1993
- Phone
- (925) 681-2800
- Verified
- August 17, 2026
- Licensed since
- 1993
- Phone
- (925) 602-1500
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (510) 569-9100
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (925) 698-2219
- Verified
- August 17, 2026
- Licensed since
- 2001
- Phone
- (925) 250-9021
- Verified
- August 17, 2026
- Licensed since
- 2006
- Phone
- (925) 808-4315
- Verified
- August 17, 2026
- Licensed since
- 2008
- Phone
- (510) 750-2524
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (415) 386-8086
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Advanced Voice & Data Inc. | #681310 | On file | 1993 |
| A T S Communications Inc. | #681709 | On file | 1993 |
| N V Heathorn Co | #761659 | On file | 1999 |
| Comletric Inc. | #783558 | On file | 2000 |
| Norcal Voice And Data | #794392 | On file | 2001 |
| Bay Alarm Company | #880138 | On file | 2006 |
Contra Costa 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: 124 active C-7 low voltage systems licenses in Contra Costa County, 28 of them registered in Concord. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Concord license has been held 16 years, and the longest-standing one dates to 1993. 16 of Concord's 28 licenses (57.1%) 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: 124 of the county's 124 licenses carry the same $25,000 bond California sets by statute. 8 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 Concord: common questions
How many licensed low voltage contractors are there in Concord?
28 active C-7 low voltage systems licenses are registered in Concord, out of 124 across Contra Costa County. 26 Concord-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. 28 active C-7 low voltage systems licenses are registered in Concord and 124 across Contra Costa County, the longest-standing issued in 1993. 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 16 of Concord's 28 currently carry. 8 Contra Costa County licenses expire within 90 days.
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