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)
Nielsen Electric Active
License #950973 C-10 Diamond Bar, CA Est. 2010
Consma Inc Active
License #951561 B Diamond Bar, CA Est. 2010
Colony On Green Active
License #951899 C-27 Diamond Bar, CA Est. 2010
Cmpg Project Management Active
License #953355 B Diamond Bar, CA Est. 2010
Hammond Drywall Construction Active
License #956694 C-2, C-9 Diamond Bar, CA Est. 2011
Ning Construction Active
License #958376 B Diamond Bar, CA Est. 2011
V C Construction & Development Active
License #959583 B Diamond Bar, CA Est. 2011
Yin Ping Liu Active
License #960083 C-10 Diamond Bar, CA Est. 2011
John Park Active
License #961400 D35 Diamond Bar, CA Est. 2011
Primo Hand Construction & Services Active
License #962220 B Diamond Bar, CA Est. 2011
Gonzalez Electric Active
License #962683 C-10 Diamond Bar, CA Est. 2011
Richard Glen Roberts Jr Active
License #963131 D35 Diamond Bar, CA Est. 2011
Hoffice Beautiful Inc Active
License #965248 B, C-15 Diamond Bar, CA Est. 2011
A And L Systems Solutions Active
License #966840 C-7 Diamond Bar, CA Est. 2011
Four Seasons Air Conditioning And Heating Active
License #966880 C-20 Diamond Bar, CA Est. 2011
Haojiang Zheng Active
License #966894 B Diamond Bar, CA Est. 2011
Kitchen And Flooring Center Inc Active
License #968078 B, C-54 Diamond Bar, CA Est. 2011
M & E Management Group Inc Active
License #969068 B Diamond Bar, CA Est. 2012
Aveo Inc Active
License #969881 A, B +3 more Diamond Bar, CA Est. 2012
Qi Tian Active
License #971912 B Diamond Bar, CA Est. 2012
Jrq Finish Carpentry Active
License #972407 C-6 Diamond Bar, CA Est. 2012
D C M Remodel Specialties Dba Douglas Charles Malo Construction Active
License #972557 B Diamond Bar, CA Est. 2012
Ming'S Construction And Hotel Renovation Active
License #973795 B Diamond Bar, CA Est. 2012
Monarch Deck Coatings Active
License #974168 D06 Diamond Bar, CA Est. 2012
Rodriguez & Sons General Construction Inc Active
License #976744 B Diamond Bar, CA Est. 2012
Derek Sim Active
License #977202 B Diamond Bar, CA Est. 2012
The Hot Mopper Active
License #978099 C-39 Diamond Bar, CA Est. 2012
Roger Henry Active
License #980170 B Diamond Bar, CA Est. 2013
Mtz Development Active
License #981566 A, B +1 more Diamond Bar, CA Est. 2013
Electech Active
License #982409 C-10 Diamond Bar, CA Est. 2013
Liang Zhou Active
License #982880 B Diamond Bar, CA Est. 2013
Dannys Installation Of Appliances Active
License #984698 D34 Diamond Bar, CA Est. 2013
3 T Media Inc Active
License #987903 C-7 Diamond Bar, CA Est. 2013
Cm Innovate Inc Active
License #992367 C-54 Diamond Bar, CA Est. 2014
Sean Krubinski Active
License #992919 B, C-33 Diamond Bar, CA Est. 2014
Echo Development Inc Active
License #993395 A Diamond Bar, CA Est. 2014
G L Construction Group Inc Active
License #994049 B Diamond Bar, CA Est. 2014
To The Max Construction Active
License #998426 B Diamond Bar, CA Est. 2014
Climate Specialists Active
License #1003654 C-20 Diamond Bar, CA Est. 2015
Vision Tree Experts Inc Active
License #1004697 D49 Diamond Bar, CA Est. 2015
Raul Manuel Magana Active
License #1005647 B, C-20 Diamond Bar, CA Est. 2015
Dynamic Solar Active
License #1006299 C-10, C-46 Diamond Bar, CA Est. 2015
Property Investment And Development Group Active
License #1006865 B Diamond Bar, CA Est. 2015
Monarch Information Systems Llc Active
License #1007648 C-10 Diamond Bar, CA Est. 2015
G A N Signs & Graphic Inc Active
License #1008442 C-45 Diamond Bar, CA Est. 2015
Sundial Concrete Constructors Active
License #1009010 C-8 Diamond Bar, CA Est. 2015
Fueltec Inc Active
License #1011678 A, HAZ Diamond Bar, CA Est. 2016
Alpha Construction Services Inc Active
License #1015331 B Diamond Bar, CA Est. 2016
Ion Security Systems Active
License #1015479 C-7, C-10 Diamond Bar, CA Est. 2016
Top Point Construction Inc Active
License #1016784 B Diamond Bar, CA Est. 2016

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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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