Licensed Contractors in Ontario, California

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: May 24, 2026.

Contractors by Trade

Building (457)
Electrical (173)
Limited (120)
Painting (111)
HVAC (67)
Plumbing (62)
Roofing (61)
Earthwork (55)
Landscaping (48)
Welding (31)
Fire (28)
Solar (3)
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
Rios Landscaping Active
License #1055486 C-27 Ontario, CA Est. 2019
Lee'S General Construction Corp Active
License #1056618 B Ontario, CA Est. 2019
Riptide Industries Active
License #1056742 A Ontario, CA Est. 2019
Aa Hvac Inc Active
License #1057513 C-20 Ontario, CA Est. 2019
Flow Rite Backflow Prevention & Repair Active
License #1057522 D64 Ontario, CA Est. 2019
Cali Window Coverings Llc Active
License #1057592 D52 Ontario, CA Est. 2019
C 2 C Plumbing Inc Active
License #1058502 C-36 Ontario, CA Est. 2019
Ontario Electric Inc Active
License #1058734 C-10 Ontario, CA Est. 2019
Mora-Data & Telecom Services Active
License #1058928 C-7, C-10 Ontario, CA Est. 2019
Low Volt Inc Active
License #1059192 C-7 Ontario, CA Est. 2019
First Choice Windows Inc Active
License #1059753 C-17 Ontario, CA Est. 2019
Alexander Installation & Technology Services Llc Active
License #1060170 C-7 Ontario, CA Est. 2019
Ja Construction Inc Active
License #1060402 B Ontario, CA Est. 2019
No Limit Tile & Stone Llc Active
License #1060542 C-54 Ontario, CA Est. 2019
Teleteks Inc Active
License #1060559 C-7 Ontario, CA Est. 2019
Matthew Ramirez Active
License #1060845 C-54 Ontario, CA Est. 2019
P & P Pavers Inc Active
License #1061124 C-29 Ontario, CA Est. 2019
J & B Patios Covers Active
License #1061238 D03 Ontario, CA Est. 2019
Vargas Painting Active
License #1061252 C-33 Ontario, CA Est. 2019
Alex Electrical Services Inc Active
License #1061425 C-10 Ontario, CA Est. 2019
Lr Masonry Inc Active
License #1061476 C-29 Ontario, CA Est. 2019
New Life Painting Active
License #1061980 C-33 Ontario, CA Est. 2020
Dmg Fire Protection Active
License #1062041 C-10, C-16 Ontario, CA Est. 2020
H & M Fence Active
License #1062196 C-13 Ontario, CA Est. 2020
Just Temperature Inc Active
License #1062818 C-20 Ontario, CA Est. 2020
Crown Communications Engineering Inc Active
License #1062965 A Ontario, CA Est. 2020
Z1 Construction Active
License #1064551 B Ontario, CA Est. 2020
Advanced Technology Inc Active
License #1064615 C-10 Ontario, CA Est. 2020
Acosta Pipeline Inc Active
License #1064810 A, C-36 Ontario, CA Est. 2020
Pacific Applications Corp Active
License #1065077 C-35 Ontario, CA Est. 2020
Ceiling Master Llc Active
License #1065081 C-5, C-9 +1 more Ontario, CA Est. 2020
Shengyu Liu Construction Active
License #1065175 B Ontario, CA Est. 2020
Old School Masonry Inc Active
License #1065241 C-8, C-29 Ontario, CA Est. 2020
Journeyman Iron Works Corporation Active
License #1065387 C-51 Ontario, CA Est. 2020
Premier Drywall Active
License #1066319 C-9 Ontario, CA Est. 2020
Trust Electric Active
License #1066593 C-10 Ontario, CA Est. 2020
Wiekamp Construction Inc Active
License #1066913 B Ontario, CA Est. 2020
Simple Restoration Inc Active
License #1066954 B, C-36 Ontario, CA Est. 2020
Roman Electric And Lighting Corp Active
License #1067012 C-10 Ontario, CA Est. 2020
Vision Construction Us Inc Active
License #1067022 B Ontario, CA Est. 2020
Balto Development Inc Active
License #1067561 B Ontario, CA Est. 2020
Aag Pump Services Active
License #1067678 D21 Ontario, CA Est. 2020
Javier Tavares Ornelas Active
License #1067792 B, C-15 Ontario, CA Est. 2020
Los Angeles Fencing Co Active
License #1068198 C-13 Ontario, CA Est. 2020
Triton Global Services Inc Dba Triton Low Voltage Services Active
License #1069175 C-7 Ontario, CA Est. 2020
C B Home Construction Inc Active
License #1069527 B Ontario, CA Est. 2020
Hy Global Llc Active
License #1072321 B Ontario, CA Est. 2020

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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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