Licensed Plumbing (C-36) contractors in Ontario, CA

The California Contractors State License Board (CSLB) lists 31 Plumbing (C-36) contractors in Ontario, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

31 contractors

1. A 2 Z Plumbing

   Ontario, CA · CSLB #1047486 · as of June 27, 2026
   Active · clear
2. Alpha Omega Plumbing

   Ontario, CA · CSLB #977823 · as of June 27, 2026
   Active · clear
3. Baumann Waterworks

   Ontario, CA · CSLB #1020247 · as of June 27, 2026
   Active · clear
4. C 2 C Plumbing INC

   Ontario, CA · CSLB #1058502 · as of June 27, 2026
   Active · clear
5. Dylan's Plumbing Group INC

   Ontario, CA · CSLB #1136831 · as of June 27, 2026
   Active · clear
6. E A Plumbing INC

   Ontario, CA · CSLB #603170 · as of June 27, 2026
   Active · clear
7. Elias Plumbing

   Ontario, CA · CSLB #1105933 · as of June 27, 2026
   Active · clear
8. Flow Dynamics INC

   Ontario, CA · CSLB #858166 · as of June 27, 2026
   Active · clear
9. G & G Plumbing

   Ontario, CA · CSLB #508994 · as of June 27, 2026
   Active · clear
10. Grace Rooter And Plumbing

    Ontario, CA · CSLB #817808 · as of June 27, 2026
    Active · clear
11. G & S Reasonable Plumbing / All Tech

    Ontario, CA · CSLB #764181 · as of June 27, 2026
    Active · clear
12. In And Out Plumbing

    Ontario, CA · CSLB #1030564 · as of June 27, 2026
    Active · clear
13. J M E Plumbing INC

    Ontario, CA · CSLB #1083921 · as of June 27, 2026
    Active · clear
14. Nelissen Plumbing

    Ontario, CA · CSLB #1142166 · as of June 27, 2026
    Active · clear
15. Orange Independent Plumbing Services

    Ontario, CA · CSLB #1005919 · as of June 27, 2026
    Active · clear
16. Jose Luis Palacios

    Ontario, CA · CSLB #986197 · as of June 27, 2026
    Active · clear
17. Pisces Plumbing

    Ontario, CA · CSLB #1133446 · as of June 27, 2026
    Active · clear
18. PNR Plumbing & Rooter

    Ontario, CA · CSLB #1150117 · as of June 27, 2026
    Active · clear
19. Pro Rooter Guys INC

    Ontario, CA · CSLB #1052306 · as of June 27, 2026
    Active · clear
20. Pro Tech Plumbing

    Ontario, CA · CSLB #915091 · as of June 27, 2026
    Active · clear
21. P V & C Plumbing And Piping INC

    Ontario, CA · CSLB #529259 · as of June 27, 2026
    Active · clear
22. Reed's Plumbing

    Ontario, CA · CSLB #788531 · as of June 27, 2026
    Active · clear
23. Royalty Plumbing INC

    Ontario, CA · CSLB #1109464 · as of June 27, 2026
    Active · clear
24. Ruvico INC

    Ontario, CA · CSLB #1021363 · as of June 27, 2026
    Active · clear
25. Safford Plumbing

    Ontario, CA · CSLB #968088 · as of June 27, 2026
    Active · clear
26. The Specialist Plumbing

    Ontario, CA · CSLB #915935 · as of June 27, 2026
    Active · clear
27. STS Plumbing & Rooter INC

    Ontario, CA · CSLB #1140510 · as of June 27, 2026
    Active · clear
28. Vargos Plumbing & Sewer INC

    Ontario, CA · CSLB #1138500 · as of June 27, 2026
    Active · clear
29. Water Solutions

    Ontario, CA · CSLB #954619 · as of June 27, 2026
    Active · clear
30. West Coast Plumbing

    Ontario, CA · CSLB #853144 · as of June 27, 2026
    Active · clear
31. American Jetting Services INC

    Ontario, CA · CSLB #845651 · as of June 27, 2026
    Suspended · workers' comp

See all Plumbing (C-36) contractors in California →

Data sourced from the California Contractors State License Board (CSLB), current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.