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)
Concrete Protection Systems West Inc Active
License #988985 D12 Ontario, CA Est. 2013
Abm Electrical Power Services Llc Active
License #989000 C-10 Ontario, CA Est. 2013
Klondike Roof Construction Service Active
License #990645 ASB, C-21 +2 more Ontario, CA Est. 2014
Airtong Heating & Cooling Active
License #991016 C-20 Ontario, CA Est. 2014
Heritage Design Build And Consulting Active
License #991737 B, C-10 Ontario, CA Est. 2014
Paradise Pool Supplies & Repairs Active
License #994024 D35 Ontario, CA Est. 2014
Dgi Structures Inc Active
License #994472 B Ontario, CA Est. 2014
Opti - Comm Technologies Active
License #995078 C-7, C-10 Ontario, CA Est. 2014
Moonlite Construction Active
License #995505 B Ontario, CA Est. 2014
Guerrero Fire Protection Inc Active
License #996238 C-16 Ontario, CA Est. 2014
Tom'S Concrete Inc Active
License #996477 C-8, C-53 Ontario, CA Est. 2014
R C A Construction Clean Up Inc Active
License #996848 B, C-9 +1 more Ontario, CA Est. 2014
Best Deal Shutters & Blinds Active
License #997420 D52 Ontario, CA Est. 2014
Opti-Comm Technologies Inc Active
License #997934 C-7, C-10 Ontario, CA Est. 2014
Axxess Door Corp Active
License #999754 C-17, D28 Ontario, CA Est. 2015
Jn Construction Inc Active
License #1001396 A, B +4 more Ontario, CA Est. 2015
Upright Communications Inc Active
License #1002378 C-10 Ontario, CA Est. 2015
Prime Line Striping Active
License #1002966 C-32 Ontario, CA Est. 2015
Arias Electrical Services Active
License #1005100 C-10 Ontario, CA Est. 2015
J R Painting & Design Active
License #1005335 C-33 Ontario, CA Est. 2015
Inland Design Build Active
License #1005429 A, B Ontario, CA Est. 2015
Orange Independent Plumbing Services Active
License #1005919 C-36 Ontario, CA Est. 2015
Hci Sprinkler Inc Active
License #1005968 C-10, C-16 Ontario, CA Est. 2015
David Gray Active
License #1008212 D52 Ontario, CA Est. 2015
Sunwest Builders Tenant Improvements Inc Active
License #1009363 B Ontario, CA Est. 2015
Nsd Electric Active
License #1009481 C-10 Ontario, CA Est. 2015
Custom Drywall Specialists Inc Active
License #1009518 C-9 Ontario, CA Est. 2015
Allstar Adu & General Builder Active
License #1009628 B, C-54 Ontario, CA Est. 2015
Rose Garden Landscaping Inc Active
License #1009854 C-27 Ontario, CA Est. 2015
Myers Power Products Inc Active
License #1009858 C-10 Ontario, CA Est. 2015
Ford Brothers Framing Inc Active
License #1010193 B Ontario, CA Est. 2016
Incredibuilds Inc Active
License #1010448 B, C-33 Ontario, CA Est. 2016
Classic Kitchens Etc Inc Dba John I Adams Construction Active
License #1011138 B Ontario, CA Est. 2016
Excell Construction Inc Active
License #1011262 B Ontario, CA Est. 2016
Yacko Construction Inc Active
License #1012085 A, B Ontario, CA Est. 2016
Dees Burke Engineering Constructors Llc Active
License #1012305 A Ontario, CA Est. 2016
Los Serrano Construction Active
License #1012653 B Ontario, CA Est. 2016
K N J M Chiller Services Inc Active
License #1014147 C-38 Ontario, CA Est. 2016
Cesars Pool Repairs Active
License #1014923 D35 Ontario, CA Est. 2016
Jw Builders Inc Active
License #1015948 B Ontario, CA Est. 2016
Lssi Llc Active
License #1016641 C-10 Ontario, CA Est. 2016
Ramirez Construction Services Inc Active
License #1017026 B Ontario, CA Est. 2016
Solar Electrical Plus Inc Active
License #1017526 C-7, C-10 Ontario, CA Est. 2016
High Speed Rooter And Plumbing Inc Active
License #1017796 A, C-36 +1 more Ontario, CA Est. 2016
Louis Palafox Construction Active
License #1018409 B, C-10 +1 more Ontario, CA Est. 2016
Affordable Hollow Metal Door Inc Active
License #1018578 D28 Ontario, CA Est. 2016
Garcia'S Backhoe Services Dba Garcia'S Construction Active
License #1018725 B Ontario, CA Est. 2016
Ac Power 1 Inc Active
License #1018955 C-10 Ontario, CA Est. 2016
Mechanical Control Active
License #1019123 C-20 Ontario, CA Est. 2016
Eagle Signs Inc Active
License #1019394 C-45 Ontario, CA Est. 2016

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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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