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)
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
Penghao Yuan Construction Active
License #1054088 B Ontario, CA Est. 2019
E Solar Company Active
License #1054112 C-10, C-46 Ontario, CA Est. 2019
Sitelogiq Inc Active
License #1054171 A, B +1 more Ontario, CA Est. 2019
M A C Metal Systems Services Active
License #1055216 D24 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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