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Licensed plumbers in Ontario, CA
36 plumbing contractors with a CSLB C-36 license list a business address in Ontario (San Bernardino 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 | Website | License # | Expires |
|---|---|---|---|---|
| A 2 Z Plumbing | (909) 758-6237 | — | 1047486 | 12/31/2026 |
| All Pro Cooling Heating Plumbing & Electrical | (909) 375-1244 | — | 1103983 | 04/30/2027 |
| Alpha Omega Plumbing | (626) 720-3009 | — | 977823 | 11/30/2027 |
| American Jetting Services Inc. | (909) 947-2107 | — | 845651 | 08/31/2028 |
| Baumann Waterworks | (909) 319-1015 | — | 1020247 | 12/31/2026 |
| C 2 C Plumbing Inc. | (818) 298-8863 | — | 1058502 | 09/30/2027 |
| Dylan's Plumbing Group Inc. | (657) 286-8739 | Visit site | 1136831 | 04/30/2027 |
| E A Plumbing Inc. | (818) 423-9927 | — | 603170 | 09/30/2028 |
| Elias Plumbing | (840) 977-8909 | — | 1105933 | 06/30/2027 |
| Flow Dynamics Inc. | (909) 930-5522 | — | 858166 | 05/31/2028 |
| G & G Plumbing | (909) 319-3367 | — | 508994 | 09/30/2027 |
| G & S Reasonable Plumbing / All Tech | (909) 917-9707 | — | 764181 | 11/30/2026 |
| Grace Rooter And Plumbing | (626) 827-2720 | Visit site | 817808 | 03/31/2027 |
| High Speed Rooter And Plumbing Inc. | (213) 949-4202 | — | 1017796 | 08/31/2028 |
| In And Out Plumbing | (909) 938-0332 | — | 1030564 | 08/31/2027 |
| J M E Plumbing Inc. | (909) 743-3587 | — | 1083921 | 11/30/2027 |
| Jake Sandoval DBA Clearwater Plumbing & Construction | (909) 244-2610 | — | 980596 | 01/31/2027 |
| Jose Luis Palacios | (323) 816-6965 | — | 986197 | 08/31/2027 |
| LVL Up Plumbing Inc. | (626) 386-9105 | — | 1146179 | 07/31/2028 |
| Nelissen Plumbing | (909) 965-1343 | — | 1142166 | 08/31/2027 |
| Orange Independent Plumbing Services | (714) 904-6988 | — | 1005919 | 04/30/2027 |
| P V & C Plumbing And Piping Inc. | (909) 595-9434 | — | 529259 | 05/31/2028 |
| Pisces Plumbing | (909) 552-3915 | Visit site | 1133446 | 02/28/2027 |
| Pro Rooter Guys Inc. | (951) 901-3957 | — | 1052306 | 04/30/2027 |
| Pro Tech Plumbing | (909) 988-7272 | — | 915091 | 04/30/2028 |
| R A Plumbing Inc. | (323) 206-7337 | — | 1164094 | 11/30/2028 |
| Reed's Plumbing | (310) 780-3093 | — | 788531 | 09/30/2028 |
| Royalty Plumbing Inc. | (909) 559-0968 | — | 1109464 | 08/31/2027 |
| STS Plumbing & Rooter Inc. | (909) 667-9119 | — | 1140510 | 07/31/2027 |
| Safford Plumbing | (909) 758-1516 | — | 968088 | 07/31/2028 |
| Showtime Family Plumbing & Rooter Inc. | (909) 840-6223 | — | 1151703 | 03/31/2028 |
| The Specialist Plumbing | (909) 969-6044 | — | 915935 | 05/31/2028 |
| Vargos Plumbing & Sewer Inc. | (909) 226-5877 | — | 1138500 | 06/30/2027 |
| Water Solutions | (909) 730-8459 | — | 954619 | 11/30/2028 |
| West Coast Pipeline Specialist | (817) 228-9059 | — | 1129511 | 11/30/2028 |
| West Coast Plumbing | (909) 437-7870 | — | 853144 | 01/31/2027 |