Licensed Contractors in Diamond Bar, California

All license data is sourced from the California Contractors State License Board (CSLB). Local dataset stamp: N/A. Verify current status before hiring.

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Building & structure Electrical & low voltage HVAC & mechanical Plumbing & water Painting & finishes Landscaping & outdoor Fire & safety Limited specialties Roofing & exterior Earthwork & concrete Solar & energy Welding & fabrication
Quark La Electrical Suspended
License #1112779 C-10 Diamond Bar, CA Licensed since 2023
Wz Home Design Inc Suspended
License #1113443 B Diamond Bar, CA Licensed since 2023
Zhuoxin Construction Suspended
License #1116182 B, C-10 +1 more Diamond Bar, CA Licensed since 2024
Jinheng Construction Engineering Us A Company Suspended
License #1134197 B Diamond Bar, CA Licensed since 2025
Jae Do Lee Suspended
License #1140383 B Diamond Bar, CA Licensed since 2025

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Licensing Resources

How to verify a contractor license
Deposit and payment rules for California contracts
Home improvement contract requirements

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