Best Licensed Plumbers in Rancho Cucamonga, CA
63 plumbing 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.
- 696 active C-36 plumbing licenses in San Bernardino County; 64 registered in Rancho Cucamonga
- 35 of Rancho Cucamonga's 64 licenses (54.7%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Rancho Cucamonga: 9 years
- Longest Rancho Cucamonga licensure: since 1981
- 59 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1981
- Phone
- (800) 790-7757
- Verified
- August 17, 2026
- Licensed since
- 1988
- Phone
- (323) 397-0828
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (909) 982-6979
- Verified
- August 17, 2026
- Licensed since
- 1993
- Phone
- (909) 980-6283
- Verified
- August 17, 2026
- Licensed since
- 1995
- Phone
- (909) 980-0644
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (951) 757-5483
- Verified
- August 17, 2026
- Licensed since
- 2004
- Phone
- (909) 941-8963
- Verified
- August 17, 2026
- Licensed since
- 2004
- Phone
- (909) 578-5608
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Dakota Backflow Co | #403777 | On file | 1981 |
| Jed August | #536787 | On file | 1988 |
| Wccg Inc. | #655509 | On file | 1992 |
| Scott Mc Leod Plumbing Inc. | #678352 | On file | 1993 |
| Dunn Plumbing Heating & Air Conditioning Inc. | #712182 | On file | 1995 |
| A C R Technologies | #811487 | On file | 2002 |
San Bernardino County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 696 active C-36 plumbing licenses in San Bernardino County, 64 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 9 years, and the longest-standing one dates to 1981. 35 of Rancho Cucamonga's 64 licenses (54.7%) 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: 696 of the county's 696 licenses carry the same $25,000 bond California sets by statute. 59 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.
Plumbers in Rancho Cucamonga: common questions
How many licensed plumbers are there in Rancho Cucamonga?
64 active C-36 plumbing licenses are registered in Rancho Cucamonga, out of 696 across San Bernardino County. 63 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 plumbers?
Yes. California licenses contractors by classification, and C-36 is the CSLB classification that authorises this work. 64 active C-36 plumbing licenses are registered in Rancho Cucamonga and 696 across San Bernardino County, the longest-standing issued in 1981. Only CLEAR, unexpired licenses appear here.
How do I check a plumber'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 35 of Rancho Cucamonga's 64 currently carry. 59 San Bernardino County licenses expire within 90 days.