Licensed Contractors in Diamond Bar, California

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: April 05, 2026.

Contractors by Trade

Building (191)
Electrical (51)
HVAC (40)
Plumbing (29)
Painting (25)
Landscaping (13)
Fire (9)
Limited (9)
Roofing (8)
Earthwork (6)
Solar (3)
Welding (2)
Stl Home Build Inc Active
License #1136498 B Diamond Bar, CA Est. 2025
Touchstone Construction Active
License #1137830 B Diamond Bar, CA Est. 2025
Freddie Vega Active
License #1138185 B Diamond Bar, CA Est. 2025
Gary & Son Construction Active
License #1138649 B Diamond Bar, CA Est. 2025
Dongqiang Lu Active
License #1139854 B Diamond Bar, CA Est. 2025
Joe Construction Group Active
License #1140095 B Diamond Bar, CA Est. 2025
Jae Do Lee Active
License #1140383 B Diamond Bar, CA Est. 2025
Jiancai Construction Inc Active
License #1141118 B Diamond Bar, CA Est. 2025
Pathfinder Construction Active
License #1141723 B Diamond Bar, CA Est. 2025
Imperium Roofing Inc Active
License #1141782 C-39 Diamond Bar, CA Est. 2025
Shoreline Construction And Development Active
License #1141851 B Diamond Bar, CA Est. 2025
Hong Construction Active
License #1142230 B Diamond Bar, CA Est. 2025
Park S Roofing Usa Active
License #1142782 C-39 Diamond Bar, CA Est. 2025
Walnut Housing Tech Inc Active
License #1142816 B Diamond Bar, CA Est. 2025
Yiu Ming Yuen Active
License #1142834 B Diamond Bar, CA Est. 2025
Cany Fire Protection Inc Active
License #1142986 C-16, C-36 Diamond Bar, CA Est. 2025
Seven Diamonds Inc Active
License #1143632 B Diamond Bar, CA Est. 2025
Elite Pipe P Active
License #1144688 C-36 Diamond Bar, CA Est. 2025
Enervision Electric Power Llc Active
License #1144854 C-10 Diamond Bar, CA Est. 2025
Donglianglu Active
License #1145119 B Diamond Bar, CA Est. 2025
Centaline Construction Inc Active
License #1145427 B Diamond Bar, CA Est. 2025
Wang Ziyi Construction Active
License #1145455 B Diamond Bar, CA Est. 2025
Ac Heat Diamond Bar Active
License #1145762 C-20 Diamond Bar, CA Est. 2025
Urbanedge Construction Inc Active
License #1145858 B Diamond Bar, CA Est. 2025
Isanvo Construction Inc Active
License #1146026 B Diamond Bar, CA Est. 2025
Wh Electrical Active
License #1147623 C-10 Diamond Bar, CA Est. 2025
New Life Construction Active
License #1148327 B Diamond Bar, CA Est. 2025
Apt Construction Inc Active
License #1149695 B Diamond Bar, CA Est. 2026
Ecp Construction Active
License #1150062 B Diamond Bar, CA Est. 2026
Mengqi Construction Active
License #1150260 B Diamond Bar, CA Est. 2026
Airpropower Active
License #1150732 C-10, C-20 Diamond Bar, CA Est. 2026
Song Construction Active
License #1151604 B Diamond Bar, CA Est. 2026
Viviluxe Construction Inc Active
License #1151920 B Diamond Bar, CA Est. 2026
Plhk Hvac Inc Active
License #1151997 C-20 Diamond Bar, CA Est. 2026
Wei Ouyang Active
License #1152437 B Diamond Bar, CA Est. 2026
Three Star Construction & Painting Co Suspended
License #337314 B, C-33 Diamond Bar, CA Est. 1977
Apple Painting Co Suspended
License #610301 C-33 Diamond Bar, CA Est. 1991
Aba Builders Inc Suspended
License #624574 B Diamond Bar, CA Est. 1991
I S Firepro Suspended
License #740006 C-16 Diamond Bar, CA Est. 1997
Gary'S Ac Services Suspended
License #921063 C-20 Diamond Bar, CA Est. 2008
Markeasy Roofing Inc Suspended
License #1047408 C-39 Diamond Bar, CA Est. 2018
Lanyi Usa Inc Suspended
License #1121762 C-20 Diamond Bar, CA Est. 2024

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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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