Licensed Contractors in Ontario, California

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: April 19, 2026.

Contractors by Trade

Building (455)
Electrical (168)
Limited (120)
Painting (109)
HVAC (65)
Roofing (63)
Plumbing (62)
Earthwork (55)
Landscaping (47)
Welding (30)
Fire (28)
Solar (3)
B3D Electric Active
License #1037130 C-10 Ontario, CA Est. 2018
Resource One Low Voltage Security Inc Active
License #1037327 C-7 Ontario, CA Est. 2018
Arena Construction Cleanup Active
License #1037475 D63 Ontario, CA Est. 2018
Legend Construction Services Inc Active
License #1038753 B, C-8 +1 more Ontario, CA Est. 2018
T & C Maintenance Services Active
License #1039358 B Ontario, CA Est. 2018
West United Builder Active
License #1039373 B Ontario, CA Est. 2018
Db Construction Inc Active
License #1039670 B Ontario, CA Est. 2018
Klear Sand Active
License #1040426 C-53 Ontario, CA Est. 2018
Deer Canyon Electric Inc Active
License #1041297 C-10 Ontario, CA Est. 2018
Elite Air Solutions Active
License #1041482 C-20 Ontario, CA Est. 2018
Ansary Aboubakare Active
License #1042235 B, C-20 +1 more Ontario, CA Est. 2018
R W Nolte Construction Inc Active
License #1042244 B Ontario, CA Est. 2018
Showcase Facility Solutions Inc Active
License #1042872 D34 Ontario, CA Est. 2018
Clara Veronica Alatorre Active
License #1043353 C-33 Ontario, CA Est. 2018
Christopher Arvizu Active
License #1043693 B Ontario, CA Est. 2018
Elite Painters Inc Active
License #1044924 C-33 Ontario, CA Est. 2018
Custom Homes Contractor Dba Custom Homes Construction Active
License #1045173 B, C-20 +1 more Ontario, CA Est. 2018
Hero Coatings Active
License #1045348 C-33, D12 Ontario, CA Est. 2018
Cristian Euceda Active
License #1045755 C-33 Ontario, CA Est. 2018
Rodolfo Blas Active
License #1045920 C-33 Ontario, CA Est. 2018
Garibay Construction Services Active
License #1046041 B, C-29 Ontario, CA Est. 2018
Zhiyong Meng Active
License #1046125 B Ontario, CA Est. 2018
Andrew George Turner Active
License #1046234 C-10 Ontario, CA Est. 2018
Brush N Roll Painting Active
License #1046867 C-33 Ontario, CA Est. 2018
Integrated Flooring Inc Active
License #1047013 C-15, C-54 Ontario, CA Est. 2018
Diamond Air Services Inc Active
License #1047483 B, C-20 +1 more Ontario, CA Est. 2018
A 2 Z Plumbing Active
License #1047486 C-36 Ontario, CA Est. 2018
Davis Mobile Home Services Active
License #1047748 C-47 Ontario, CA Est. 2018
Hb Construction Active
License #1047800 B Ontario, CA Est. 2018
Senor Septic Construction And Pumping Inc Active
License #1048170 C-42 Ontario, CA Est. 2018
Gerardo Alvarado Active
License #1048441 C-6 Ontario, CA Est. 2018
Jdk Demo Active
License #1048561 C-12, C-21 Ontario, CA Est. 2019
Avail Electrical Services Llc Active
License #1048984 C-10 Ontario, CA Est. 2019
Veltel Infrastructure Services Llc Active
License #1049531 B, C-10 +1 more Ontario, CA Est. 2019
Bc7 Construction Inc Active
License #1049615 B, C-36 Ontario, CA Est. 2019
Haven Cleaning And Restoration Inc Active
License #1049640 B Ontario, CA Est. 2019
Form & Function Landscape Active
License #1049832 C-27 Ontario, CA Est. 2019
Maple Tree Service Active
License #1050206 D49 Ontario, CA Est. 2019
Hr Garcia Construction Inc Active
License #1050598 B Ontario, CA Est. 2019
Martinez Steel Llc Active
License #1050623 C-50 Ontario, CA Est. 2019
Innovation Painting Inc Active
License #1051191 C-33 Ontario, CA Est. 2019
A&B Plumbing Solutions Inc Active
License #1051865 C-36 Ontario, CA Est. 2019
M J Pacific Inc Active
License #1051869 A Ontario, CA Est. 2019
Pro Rooter Guys Inc Active
License #1052306 C-36 Ontario, CA Est. 2019
Junior'S Carpet & Floor Covering Active
License #1052668 C-15 Ontario, CA Est. 2019
Aranda'S Sanitation Systems Active
License #1053122 C-42 Ontario, CA Est. 2019
Grace Pro Roofing Inc Active
License #1053426 C-39 Ontario, CA Est. 2019
Virtue Air Conditioning Inc Active
License #1053503 C-20 Ontario, CA Est. 2019
Orellana'S Garage Doors Inc Active
License #1054005 D28 Ontario, CA Est. 2019
Chun Li Active
License #1054025 C-20 Ontario, CA Est. 2019

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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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