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)
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
H Septic Active
License #1149300 C-42 Ontario, CA Est. 2026
Fire Solution Masters Corp Active
License #1149321 C-16 Ontario, CA Est. 2026
Castle Construction And Development Inc Active
License #1149616 B Ontario, CA Est. 2026
Pnr Plumbing & Rooter Active
License #1150117 C-36 Ontario, CA Est. 2026
Koguma Sweet Home Active
License #1150188 B Ontario, CA Est. 2026
Trinidad Electrical Contractors Active
License #1150363 C-10 Ontario, CA Est. 2026
Pam Pan Xu Active
License #1150481 B Ontario, CA Est. 2026
Effina Active
License #1150901 C-20 Ontario, CA Est. 2026
A2Z Builders Group Inc Active
License #1150914 B Ontario, CA Est. 2026
Mve Electric Inc Active
License #1151112 C-10 Ontario, CA Est. 2026
Right Call Services Inc Active
License #1151470 B Ontario, CA Est. 2026
All Tech Commercial Pool Service & Repair Active
License #1152862 D35 Ontario, CA Est. 2026
Di Shao Construction Active
License #1153127 B Ontario, CA Est. 2026
Premium Carpet Installation Suspended
License #573637 C-15 Ontario, CA Est. 1989
Robcorp Construction Inc Suspended
License #649014 C-12 Ontario, CA Est. 1992
Atlantic Refrigeration & Appliances Suspended
License #662919 C-20, C-38 Ontario, CA Est. 1993
Cardin Construction Suspended
License #730241 B Ontario, CA Est. 1996
Simington Painting Company Suspended
License #739139 C-33 Ontario, CA Est. 1997
Southern Light Electric Suspended
License #756715 C-10 Ontario, CA Est. 1998
Kyle Gilmore Plumbing Hvac R Suspended
License #883106 C-20, C-36 +1 more Ontario, CA Est. 2006
Sutas Hangthaisong Suspended
License #887657 B Ontario, CA Est. 2006
Ambak Construction Suspended
License #923086 B Ontario, CA Est. 2008
Goedhart Landscaping Suspended
License #934150 C-27 Ontario, CA Est. 2009
M C R Masonry Co Suspended
License #954433 C-8, C-29 Ontario, CA Est. 2010
Quality Construction & Repair Services Suspended
License #962423 B Ontario, CA Est. 2011
Szeka Painting & Wallcovering Suspended
License #1004115 C-33 Ontario, CA Est. 2015
Cesars Pool Repairs Suspended
License #1014923 D35 Ontario, CA Est. 2016
Duke Realty Limited Partnership Suspended
License #1019607 B Ontario, CA Est. 2016
Solis Alarm Systems Suspended
License #1054405 C-10 Ontario, CA Est. 2019
C 2 C Plumbing Inc Suspended
License #1058502 C-36 Ontario, CA Est. 2019
Luna'S Garage Doors Inc Suspended
License #1064893 D28 Ontario, CA Est. 2020
De Luna Framing Suspended
License #1071148 C-5 Ontario, CA Est. 2020
Next Generation Floor Covering Suspended
License #1089919 C-15, D06 +1 more Ontario, CA Est. 2022
Sky Color Painting Inc Suspended
License #1090696 C-33 Ontario, CA Est. 2022
Strong Group Specialty Coatings Suspended
License #1097888 C-33 Ontario, CA Est. 2022
Decaa Landscaping Suspended
License #1098408 C-27 Ontario, CA Est. 2022
Ultimate Electric Llc Suspended
License #1104900 C-10 Ontario, CA Est. 2023
Sun Microgrid Solar Inc Suspended
License #1105671 C-10 Ontario, CA Est. 2023
Meta Group Builder Suspended
License #1108241 B Ontario, CA Est. 2023
Royalty Plumbing Inc Suspended
License #1109464 C-36 Ontario, CA Est. 2023
Buena Vista Contractors Suspended
License #1112707 B Ontario, CA Est. 2023
#1 California Flooring Inc Suspended
License #1115597 C-15 Ontario, CA Est. 2024
C E B M Inc Suspended
License #1124853 D06, D63 Ontario, CA Est. 2024
Er5 Construction Inc Suspended
License #1125259 B Ontario, CA Est. 2024

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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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