Licensed Plumbing (C-36) contractors in Diamond Bar, CA

The California Contractors State License Board (CSLB) lists 9 Plumbing (C-36) contractors in Diamond Bar, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

9 contractors

1. Advanced Tankless And Plumbing

   Diamond Bar, CA · CSLB #1121827 · as of June 27, 2026
   Active · clear
2. All Day Drains

   Diamond Bar, CA · CSLB #1088634 · as of June 27, 2026
   Active · clear
3. Elite Pipe P

   Diamond Bar, CA · CSLB #1144688 · as of June 27, 2026
   Active · clear
4. Expedite Plumbing

   Diamond Bar, CA · CSLB #939646 · as of June 27, 2026
   Active · clear
5. Galvan Plumbing

   Diamond Bar, CA · CSLB #1065435 · as of June 27, 2026
   Active · clear
6. G C Plumbing

   Diamond Bar, CA · CSLB #681446 · as of June 27, 2026
   Active · clear
7. Jay's Plumbing

   Diamond Bar, CA · CSLB #622850 · as of June 27, 2026
   Active · clear
8. J H Plumbing

   Diamond Bar, CA · CSLB #876263 · as of June 27, 2026
   Active · clear
9. Jones Plumbing

   Diamond Bar, CA · CSLB #917266 · as of June 27, 2026
   Active · clear

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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.