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

The California Contractors State License Board (CSLB) lists 32 Plumbing (C-36) contractors in Ontario, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of October 6, 2026.

32 contractors

1. A 2 Z Plumbing

   Ontario, CA · CSLB #1047486 · as of October 6, 2026
   Active · clear
2. Alpha Omega Plumbing

   Ontario, CA · CSLB #977823 · as of October 6, 2026
   Active · open complaint
3. American Jetting Services INC

   Ontario, CA · CSLB #845651 · as of October 6, 2026
   Active · clear
4. Baumann Waterworks

   Ontario, CA · CSLB #1020247 · as of October 6, 2026
   Active · clear
5. Dylan's Plumbing Group INC

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

   Ontario, CA · CSLB #603170 · as of October 6, 2026
   Active · clear
7. Elias Plumbing

   Ontario, CA · CSLB #1105933 · as of October 6, 2026
   Active · clear
8. Flow Dynamics INC

   Ontario, CA · CSLB #858166 · as of October 6, 2026
   Active · clear
9. G & G Plumbing

   Ontario, CA · CSLB #508994 · as of October 6, 2026
   Active · clear
10. Grace Rooter And Plumbing

    Ontario, CA · CSLB #817808 · as of October 6, 2026
    Active · clear
11. G & S Reasonable Plumbing / All Tech

    Ontario, CA · CSLB #764181 · as of October 6, 2026
    Active · clear
12. In And Out Plumbing

    Ontario, CA · CSLB #1030564 · as of October 6, 2026
    Active · clear
13. J M E Plumbing INC

    Ontario, CA · CSLB #1083921 · as of October 6, 2026
    Active · clear
14. LVL Up Plumbing INC

    Ontario, CA · CSLB #1146179 · as of October 6, 2026
    Active · clear
15. Nelissen Plumbing

    Ontario, CA · CSLB #1142166 · as of October 6, 2026
    Active · clear
16. Orange Independent Plumbing Services

    Ontario, CA · CSLB #1005919 · as of October 6, 2026
    Active · clear
17. Jose Luis Palacios

    Ontario, CA · CSLB #986197 · as of October 6, 2026
    Active · clear
18. Pisces Plumbing

    Ontario, CA · CSLB #1133446 · as of October 6, 2026
    Active · clear
19. PNR Plumbing & Rooter

    Ontario, CA · CSLB #1150117 · as of October 6, 2026
    Active · clear
20. Pro Rooter Guys INC

    Ontario, CA · CSLB #1052306 · as of October 6, 2026
    Active · clear
21. Pro Tech Plumbing

    Ontario, CA · CSLB #915091 · as of October 6, 2026
    Active · clear
22. P V & C Plumbing And Piping INC

    Ontario, CA · CSLB #529259 · as of October 6, 2026
    Active · clear
23. Reed's Plumbing

    Ontario, CA · CSLB #788531 · as of October 6, 2026
    Active · clear
24. Royalty Plumbing INC

    Ontario, CA · CSLB #1109464 · as of October 6, 2026
    Active · clear
25. Ruvico INC

    Ontario, CA · CSLB #1021363 · as of October 6, 2026
    Active · clear
26. Safford Plumbing

    Ontario, CA · CSLB #968088 · as of October 6, 2026
    Active · clear
27. Showtime Family Plumbing & Rooter INC

    Ontario, CA · CSLB #1151703 · as of October 6, 2026
    Active · clear
28. The Specialist Plumbing

    Ontario, CA · CSLB #915935 · as of October 6, 2026
    Active · clear
29. STS Plumbing & Rooter INC

    Ontario, CA · CSLB #1140510 · as of October 6, 2026
    Active · clear
30. Vargos Plumbing & Sewer INC

    Ontario, CA · CSLB #1138500 · as of October 6, 2026
    Active · clear
31. Water Solutions

    Ontario, CA · CSLB #954619 · as of October 6, 2026
    Active · clear
32. West Coast Plumbing

    Ontario, CA · CSLB #853144 · as of October 6, 2026
    Active · clear

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

Data sourced from the California Contractors State License Board (CSLB), current as of October 6, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.