Best Licensed Plumbers in Upland, CA
39 plumbing companies registered in Upland 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; 40 registered in Upland
- 22 of Upland's 40 licenses (55.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Upland: 15 years
- Longest Upland licensure: since 1982
- 59 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (909) 981-8200
- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (626) 253-7570
- Verified
- August 17, 2026
- Licensed since
- 1983
- Phone
- (909) 985-4412
- Verified
- August 17, 2026
- Licensed since
- 1987
- Phone
- (909) 982-2364
- Verified
- August 17, 2026
- Licensed since
- 1994
- Phone
- (909) 989-1980
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (714) 719-9976
- Verified
- August 17, 2026
- Licensed since
- 1998
- Phone
- (909) 985-5254
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (909) 437-7869
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Duke Plumbing Inc. | #430513 | On file | 1982 |
| Elder Industries Inc. | #432244 | On file | 1982 |
| P L Plumbing | #438466 | On file | 1983 |
| Michael Gregory Porteous DBA Mgp Construction | #510978 | On file | 1987 |
| Rancho Plumbing Heating & Air | #689936 | On file | 1994 |
| Champion Plumbing And Repiping | #730334 | On file | 1996 |
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, 40 of them registered in Upland. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Upland license has been held 15 years, and the longest-standing one dates to 1982. 22 of Upland's 40 licenses (55.0%) 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 Upland: common questions
How many licensed plumbers are there in Upland?
40 active C-36 plumbing licenses are registered in Upland, out of 696 across San Bernardino County. 39 Upland-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. 40 active C-36 plumbing licenses are registered in Upland and 696 across San Bernardino County, the longest-standing issued in 1982. 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 22 of Upland's 40 currently carry. 59 San Bernardino County licenses expire within 90 days.