Licensed Contractors in Ontario, California
All license data is sourced from the California Contractors State License Board (CSLB). Last data update: February 20, 2026.
Contractors by Classification
General Contractors
B: General Building Contractor
(341)
A: General Engineering Contractor
(63)
B-2: Residential Remodeling Contractor
(4)
Specialty Contractors
C-10: Electrical Contractor
(128)
C-33: Painting and Decorating Contractor
(54)
C-36: Plumbing Contractor
(49)
C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor
(46)
C-7: Low Voltage Systems Contractor
(37)
C-27: Landscaping Contractor
(34)
C-8: Concrete Contractor
(29)
C-15: Flooring and Floor Covering Contractor
(29)
C-39: Roofing Contractor
(26)
D28: Doors, Gates and Activating Devices
(22)
Jcsv Builders Inc
Active
License #1134819
B
Ontario, CA
Est. 2025
Pacific Edge Concrete
Active
License #1135512
C-8
Ontario, CA
Est. 2025
Apex Concrete
Active
License #1135754
C-8
Ontario, CA
Est. 2025
Evan Ibaldo Castillo
Active
License #1135800
C-54
Ontario, CA
Est. 2025
Nick Air Conditioning Inc
Active
License #1135910
C-20
Ontario, CA
Est. 2025
License #1135952
C-16
Ontario, CA
Est. 2025
Brilliant Building Group
Active
License #1136246
B
Ontario, CA
Est. 2025
Rise Above Landscape Inc
Active
License #1136557
C-27
Ontario, CA
Est. 2025
Rc Tree Care
Active
License #1136616
C-49
Ontario, CA
Est. 2025
Dylan'S Plumbing Group Inc
Active
License #1136831
C-36
Ontario, CA
Est. 2025
Cm Custom Paint And Stain
Active
License #1137094
C-33
Ontario, CA
Est. 2025
Wiskind Construction Inc
Active
License #1137238
B
Ontario, CA
Est. 2025
License #1137486
C-51
Ontario, CA
Est. 2025
Varez Construction Inc
Active
License #1138147
B
Ontario, CA
Est. 2025
Fangwen Han
Active
License #1138190
B
Ontario, CA
Est. 2025
Vargos Plumbing & Sewer Inc
Active
License #1138500
C-36
Ontario, CA
Est. 2025
Vgc
Active
License #1138625
B
Ontario, CA
Est. 2025
Ken Lee
Active
License #1138718
B
Ontario, CA
Est. 2025
Master Chill Heating And Air
Active
License #1138989
C-20
Ontario, CA
Est. 2025
Elite Precision Air Systems
Active
License #1139417
C-20
Ontario, CA
Est. 2025
Get It Done Epoxy Llc
Active
License #1140290
D06
Ontario, CA
Est. 2025
Sts Plumbing & Rooter Inc
Active
License #1140510
C-36
Ontario, CA
Est. 2025
License #1140617
D34
Ontario, CA
Est. 2025
Fixd Construction Co
Active
License #1140628
B
Ontario, CA
Est. 2025
New Look Mandos Painting Inc
Active
License #1140750
C-33
Ontario, CA
Est. 2025
Triage Ca Llc
Active
License #1141008
C-7
Ontario, CA
Est. 2025
Salas Electric Co
Active
License #1141393
C-10
Ontario, CA
Est. 2025
Even Mas Plastering
Active
License #1141715
C-35
Ontario, CA
Est. 2025
Thacker'S Engineering
Active
License #1141853
A
Ontario, CA
Est. 2025
Nelissen Plumbing
Active
License #1142166
C-36
Ontario, CA
Est. 2025
Ddpt Inc
Active
License #1142270
B, C-54
Ontario, CA
Est. 2025
Zienix Property Services
Active
License #1142312
B
Ontario, CA
Est. 2025
Ddl Construction Inc
Active
License #1142403
B
Ontario, CA
Est. 2025
Rema Builders
Active
License #1142912
B, C-10 +1 more
Ontario, CA
Est. 2025
Alfa Power Electric
Active
License #1142958
C-10
Ontario, CA
Est. 2025
Ran Li
Active
License #1143733
B
Ontario, CA
Est. 2025
Crown Construction Group Inc
Active
License #1143986
B
Ontario, CA
Est. 2025
Simple Builds
Active
License #1144241
B
Ontario, CA
Est. 2025
Jc Custom Sheet Metal Llc
Active
License #1144832
C-43
Ontario, CA
Est. 2025
Hdz Construct Inc
Active
License #1144932
B
Ontario, CA
Est. 2025
Ashka Design & Construction
Active
License #1145356
B
Ontario, CA
Est. 2025
License #1145410
B, C-33
Ontario, CA
Est. 2025
Mw Energy Llc
Active
License #1146182
C-10
Ontario, CA
Est. 2025
Practicore Solutions Inc
Active
License #1146273
A
Ontario, CA
Est. 2025
Fastech Critical Power
Active
License #1146293
C-10
Ontario, CA
Est. 2025
The Paving Pros
Active
License #1146478
C-12
Ontario, CA
Est. 2025
Interebar
Active
License #1146594
C-50
Ontario, CA
Est. 2025
Construx West Inc
Active
License #1146772
B
Ontario, CA
Est. 2025
Vanedi Home Improvement Inc
Active
License #1147022
B
Ontario, CA
Est. 2025
License #1147044
C-8
Ontario, CA
Est. 2025