Licensed Contractors in Ontario, California

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

Contractors by Trade

Building (456)
Electrical (166)
Limited (119)
Painting (108)
HVAC (63)
Roofing (63)
Plumbing (61)
Earthwork (55)
Landscaping (49)
Welding (30)
Fire (28)
Solar (3)
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
R & B Wholesale Distributors Llc Active
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
Uwing Construction Inc 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
Golden One Construction & Coating Active
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
Strong Base Concrete Construction Active
License #1147044 C-8 Ontario, CA Est. 2025
Silver Line Framing Active
License #1147108 C-5 Ontario, CA Est. 2025
Michael Woodfloor Inc Active
License #1147166 C-15 Ontario, CA Est. 2025
Nexera Concrete Active
License #1147247 C-8 Ontario, CA Est. 2025
Superheat Refrigeration Active
License #1147315 C-38 Ontario, CA Est. 2025
Emergency Gate Services Llc Active
License #1147615 D28 Ontario, CA Est. 2025
Mendez Cabinets Active
License #1147647 C-6 Ontario, CA Est. 2025
Mana Concrete Active
License #1147704 C-8 Ontario, CA Est. 2025
Ie Roof Experts Active
License #1147770 C-39 Ontario, CA Est. 2025
J&N Maintenance Services Active
License #1147841 B Ontario, CA Est. 2025
Guenther Woodworks And Stairs Active
License #1148354 C-6 Ontario, CA Est. 2025
Westfire Prefabricated Fireplace Active
License #1148395 D34 Ontario, CA Est. 2025
Solid Drywall Works Inc Active
License #1148610 C-9 Ontario, CA Est. 2026
Hiyawill Construction Inc Active
License #1148677 B Ontario, CA Est. 2026
Cadre Construction Llc Active
License #1148827 B Ontario, CA Est. 2026
Alc Roofing Active
License #1148910 C-39 Ontario, CA Est. 2026
Tapia Roofing Active
License #1149023 C-39 Ontario, CA Est. 2026
Amins Construction Inc Active
License #1149094 B Ontario, CA Est. 2026

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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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