Best Licensed Plumbers in Glendora, CA
33 plumbing companies registered in Glendora 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.
- 4,272 active C-36 plumbing licenses in Los Angeles County; 34 registered in Glendora
- 20 of Glendora's 34 licenses (58.8%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Glendora: 13 years
- Longest Glendora licensure: since 1975
- 375 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1975
- Phone
- (626) 963-9810
- Verified
- August 17, 2026
- Licensed since
- 1980
- Phone
- (626) 335-0574
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (626) 963-3313
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (626) 335-0415
- Verified
- August 17, 2026
- Licensed since
- 1994
- Phone
- (626) 428-6254
- Verified
- August 17, 2026
- Licensed since
- 2003
- Phone
- (626) 335-2118
- Verified
- August 17, 2026
- Licensed since
- 2005
- Phone
- (626) 484-0996
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (626) 672-6213
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Cypress Heating & Air Conditioning | #302865 | On file | 1975 |
| Glendora Plumbing & Heating Inc. | #388123 | On file | 1980 |
| Jordanair Inc. | #560429 | On file | 1989 |
| Count On Plumbing | #610947 | On file | 1991 |
| D C Plumbing | #687907 | On file | 1994 |
| K B Engineering Inc. | #819366 | On file | 2003 |
Los Angeles County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 4,272 active C-36 plumbing licenses in Los Angeles County, 34 of them registered in Glendora. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Glendora license has been held 13 years, and the longest-standing one dates to 1975. 20 of Glendora's 34 licenses (58.8%) 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: 4,270 of the county's 4,272 licenses carry the same $25,000 bond California sets by statute. 375 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 Glendora: common questions
How many licensed plumbers are there in Glendora?
34 active C-36 plumbing licenses are registered in Glendora, out of 4,272 across Los Angeles County. 33 Glendora-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. 34 active C-36 plumbing licenses are registered in Glendora and 4,272 across Los Angeles County, the longest-standing issued in 1975. 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 20 of Glendora's 34 currently carry. 375 Los Angeles County licenses expire within 90 days.