Best Licensed Low Voltage Contractors in Rancho Cucamonga, CA
23 low voltage companies registered in Rancho Cucamonga 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.
- 220 active C-7 low voltage systems licenses in San Bernardino County; 24 registered in Rancho Cucamonga
- 14 of Rancho Cucamonga's 24 licenses (58.3%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Rancho Cucamonga: 15 years
- Longest Rancho Cucamonga licensure: since 1985
- 18 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (714) 747-3784
- Verified
- August 17, 2026
- Licensed since
- 1997
- Phone
- (909) 980-5621
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (909) 941-3494
- Verified
- August 17, 2026
- Licensed since
- 2006
- Phone
- (909) 899-6475
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (909) 919-2800
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (909) 721-9685
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (909) 477-6325
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (951) 454-9170
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Southern Lan Technologies | #645795 | On file | 1992 |
| Tel Set Communications Inc. | #739534 | On file | 1997 |
| Retrofit Service Co Inc. | #760432 | On file | 1999 |
| Cable Brothers Inc. | #880335 | On file | 2006 |
| Network Integration Company Partners Inc. | #904167 | On file | 2007 |
| Telcom Services Group | #935088 | On file | 2009 |
San Bernardino 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: 220 active C-7 low voltage systems licenses in San Bernardino County, 24 of them registered in Rancho Cucamonga. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Rancho Cucamonga license has been held 15 years, and the longest-standing one dates to 1985. 14 of Rancho Cucamonga's 24 licenses (58.3%) 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: 220 of the county's 220 licenses carry the same $25,000 bond California sets by statute. 18 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 Rancho Cucamonga: common questions
How many licensed low voltage contractors are there in Rancho Cucamonga?
24 active C-7 low voltage systems licenses are registered in Rancho Cucamonga, out of 220 across San Bernardino County. 23 Rancho Cucamonga-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. 24 active C-7 low voltage systems licenses are registered in Rancho Cucamonga and 220 across San Bernardino County, the longest-standing issued in 1985. 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 14 of Rancho Cucamonga's 24 currently carry. 18 San Bernardino County licenses expire within 90 days.
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