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Licensed plumbers in Diamond Bar, CA
12 plumbing contractors with a CSLB C-36 license list a business address in Diamond Bar (Los Angeles County). A listing is not an endorsement.
Guides: Water heater installation in California · How to hire a plumber in California · What a C-36 plumbing license covers
Listings are CSLB C-36 Plumbing licences in the file downloaded November 4, 2026. Confirm a license is current on the CSLB license check before hiring.
| Business | Phone | License # | Expires |
|---|---|---|---|
| Ace Plumbing Co. | (909) 973-0227 | 785570 | 10/31/2028 |
| Advanced Tankless And Plumbing | (909) 977-1365 | 1121827 | 06/30/2028 |
| All Day Drains | (909) 413-3776 | 1088634 | 03/31/2028 |
| Elite Pipe P Website | (626) 392-3916 | 1144688 | 10/31/2027 |
| Expedite Plumbing | (626) 217-3744 | 939646 | 10/31/2027 |
| G C Plumbing | (714) 342-1884 | 681446 | 12/31/2027 |
| Galvan Plumbing | (714) 417-4949 | 1065435 | 04/30/2028 |
| J H Plumbing | (310) 738-8514 | 876263 | 04/30/2028 |
| Jay's Plumbing | (626) 912-0083 | 622850 | 07/31/2027 |
| Jones Plumbing | (909) 292-7732 | 917266 | 06/30/2028 |
| Todd Clark DBA Rooter Shooter | (626) 708-0833 | 800418 | 10/31/2027 |
| Vanguard Plumbing | (714) 622-9511 | 1161936 | 09/30/2028 |