Licensed Plumbing (C-36) contractors in California

The California Contractors State License Board (CSLB) lists 12,055 California contractors classified C-36 (Plumbing (C-36)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of October 8, 2026.

Showing 5,101–5,160 of 12,055 contractors

1. In Sink

   Hidden Valley Lake, CA · CSLB #1079662 · as of October 8, 2026
   Active · clear
2. Insta-flow Plumbing CO

   Long Beach, CA · CSLB #1050503 · as of October 8, 2026
   Active · clear
3. Installation Pro Plumbing LLC

   Rancho Cucamonga, CA · CSLB #1091801 · as of October 8, 2026
   Active · clear
4. Installation & Repair Plumbing

   National City, CA · CSLB #1089290 · as of October 8, 2026
   Active · clear
5. Instant Plumbing

   Garden Grove, CA · CSLB #1063671 · as of October 8, 2026
   Active · clear
6. Instant Plumbing Solutions

   Tustin, CA · CSLB #1066842 · as of October 8, 2026
   Active · clear
7. Integrity First Plumbing INC

   San Francisco, CA · CSLB #1006178 · as of October 8, 2026
   Active · clear
8. Integrity Plumbing

   La Verne, CA · CSLB #790414 · as of October 8, 2026
   Active · clear
9. Integrity Plumbing

   Fairfield, CA · CSLB #889475 · as of October 8, 2026
   Active · clear
10. Integrity Plumbing

    Moreno Valley, CA · CSLB #419068 · as of October 8, 2026
    Active · clear
11. Integrity Plumbing And Drain

    Galt, CA · CSLB #1157675 · as of October 8, 2026
    Active · clear
12. Integrity Plumbing Company

    Covina, CA · CSLB #717098 · as of October 8, 2026
    Active · clear
13. Integrity Plumbing INC

    Rancho Santa Margarita, CA · CSLB #1098635 · as of October 8, 2026
    Active · clear
14. Integrity Plumbing Inspection

    Camarillo, CA · CSLB #1084653 · as of October 8, 2026
    Active · clear
15. Integrity Plumbing & Rooter Service

    Cypress, CA · CSLB #894178 · as of October 8, 2026
    Active · clear
16. Integrity Plumbing Service & Repair

    Windsor, CA · CSLB #1129600 · as of October 8, 2026
    Active · clear
17. Integrity Plus Plumbing

    Oakland, CA · CSLB #1094396 · as of October 8, 2026
    Active · clear
18. Integrity Plus Plumbing Ie INC

    Wildomar, CA · CSLB #1066198 · as of October 8, 2026
    Active · clear
19. Integrity Quality Plumbing INC

    Rialto, CA · CSLB #1160427 · as of October 8, 2026
    Active · clear
20. Integrity Repipe

    Sun Valley, CA · CSLB #946288 · as of October 8, 2026
    Active · clear
21. Integrity Repipe INC

    San Clemente, CA · CSLB #993925 · as of October 8, 2026
    Active · clear
22. Intelligent Plumbing Systems

    Oviedo, CA · CSLB #1060415 · as of October 8, 2026
    Active · clear
23. Intercity Plumbing

    Yucca Valley, CA · CSLB #1138173 · as of October 8, 2026
    Active · clear
24. Interlock Plumbing

    Antioch, CA · CSLB #1149890 · as of October 8, 2026
    Active · clear
25. Interstate Plumbing

    Cathedral City, CA · CSLB #1098691 · as of October 8, 2026
    Active · clear
26. In Touch Plumbing

    Palmdale, CA · CSLB #850775 · as of October 8, 2026
    Active · clear
27. Invert Plumbing

    Palmdale, CA · CSLB #1094780 · as of October 8, 2026
    Active · clear
28. Invision Plumbing INC

    Montebello, CA · CSLB #1099402 · as of October 8, 2026
    Active · clear
29. I Plumber

    Healdsburg, CA · CSLB #798832 · as of October 8, 2026
    Active · clear
30. I Plumb INC

    San Carlos, CA · CSLB #1079172 · as of October 8, 2026
    Active · clear
31. Iq Plumbing

    Indio, CA · CSLB #1088716 · as of October 8, 2026
    Active · clear
32. I Q Plumbing & Rooter INC

    Modesto, CA · CSLB #1143572 · as of October 8, 2026
    Active · clear
33. Irc Backflow

    Banning, CA · CSLB #1101805 · as of October 8, 2026
    Active · clear
34. Irc Plumbing INC

    La Habra, CA · CSLB #974180 · as of October 8, 2026
    Active · clear
35. Irish Spring Plumbing INC

    Burbank, CA · CSLB #636941 · as of October 8, 2026
    Active · clear
36. Ironclad Plumbing And Drain

    Santa Ana, CA · CSLB #1159038 · as of October 8, 2026
    Active · clear
37. Ironflow Plumbing

    Murrieta, CA · CSLB #1161381 · as of October 8, 2026
    Active · clear
38. Iron Grip Plumbing & Repipe

    Sacramento, CA · CSLB #1160181 · as of October 8, 2026
    Active · clear
39. Iron Horse Plumbing

    Gilbert, CA · CSLB #993890 · as of October 8, 2026
    Active · clear
40. Iron Mountain Plumbing

    Anaheim, CA · CSLB #1102865 · as of October 8, 2026
    Active · clear
41. Iron Oak Plumbing INC

    Rocklin, CA · CSLB #957251 · as of October 8, 2026
    Active · clear
42. Iron Plumbing

    Sylmar, CA · CSLB #998803 · as of October 8, 2026
    Active · clear
43. Iron Plumbing

    Vista, CA · CSLB #1010429 · as of October 8, 2026
    Active · clear
44. Iron Plumbing GT INC

    Los Angeles, CA · CSLB #1158283 · as of October 8, 2026
    Active · clear
45. Iron Strong Plumbing

    Marysville, CA · CSLB #1111347 · as of October 8, 2026
    Active · clear
46. Iron Valley Plumbing INC

    Lodi, CA · CSLB #1037620 · as of October 8, 2026
    Active · clear
47. I Rooter Plumbing

    Cathedral City, CA · CSLB #1055784 · as of October 8, 2026
    Active · clear
48. I Rooter & Plumbing

    San Francisco, CA · CSLB #1052114 · as of October 8, 2026
    Active · clear
49. I R R I Care Plumbing And Backflow Testing INC

    La Puente, CA · CSLB #998492 · as of October 8, 2026
    Active · clear
50. Chris Isaacs Plumbing INC

    Temecula, CA · CSLB #952326 · as of October 8, 2026
    Active · clear
51. Isaac & Sons Plumbing INC

    Glendora, CA · CSLB #1000605 · as of October 8, 2026
    Active · clear
52. Isackson Plumbing

    Rossmoor, CA · CSLB #1114153 · as of October 8, 2026
    Active · clear
53. Isaiah's Plumbing

    Upper Lake, CA · CSLB #979539 · as of October 8, 2026
    Active · clear
54. I S E Plumbing

    Reno, CA · CSLB #1154882 · as of October 8, 2026
    Active · clear
55. Island Plumbing INC

    Costa Mesa, CA · CSLB #1158007 · as of October 8, 2026
    Active · clear
56. Iso Plumbing INC

    San Lorenzo, CA · CSLB #1041451 · as of October 8, 2026
    Active · clear
57. Israa Plumbing

    Antioch, CA · CSLB #1083938 · as of October 8, 2026
    Active · clear
58. It'splumber INC

    Los Angeles, CA · CSLB #1111846 · as of October 8, 2026
    Active · clear
59. Ivan Ivanov

    Dublin, CA · CSLB #1157076 · as of October 8, 2026
    Active · clear
60. Ivan's Plumbing & Drain

    Grass Valley, CA · CSLB #1156629 · as of October 8, 2026
    Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of October 8, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.