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)
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
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
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
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
Cfl Engineers Dba 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
Rad Services Inc Active
License #1073055 ASB, C-21 +1 more Ontario, CA Est. 2021

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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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