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)
Hillwood Construction Services Of California L P Active
License #865674 B Ontario, CA Est. 2005
Young C Lee Active
License #867519 B, C-17 Ontario, CA Est. 2005
Cox Commerical & Industrial Inc Active
License #868078 B Ontario, CA Est. 2005
Technical Pool Repair Active
License #868779 D35 Ontario, CA Est. 2005
Marquez Iron Inc Active
License #868855 C-23 Ontario, CA Est. 2005
Gomez And Gomez Inc Active
License #870559 C-10 Ontario, CA Est. 2006
Innovative Glazing Solutions Active
License #871285 C-17 Ontario, CA Est. 2006
Martin Robles Garcia Active
License #872581 C-27 Ontario, CA Est. 2006
Golden Star Construction Services Active
License #872650 B Ontario, CA Est. 2006
Robert Hoyle Active
License #873164 C-17 Ontario, CA Est. 2006
Del Mar Floor Covering Inc Active
License #873992 C-15, C-54 Ontario, CA Est. 2006
Safe Usa Inc Active
License #874085 C-32 Ontario, CA Est. 2006
Geo'S Carpet & Flooring Active
License #875511 C-15 Ontario, CA Est. 2006
Martin Cervantes Active
License #875647 C-39 Ontario, CA Est. 2006
Golden Leaf Construction Inc Active
License #876099 B, C-53 Ontario, CA Est. 2006
Sandoval Construction Active
License #876715 B Ontario, CA Est. 2006
The Masonry Company Active
License #879574 C-29 Ontario, CA Est. 2006
Douma Concrete Active
License #879852 C-8 Ontario, CA Est. 2006
Mc Ghee Construction Inc Active
License #884036 A, B +1 more Ontario, CA Est. 2006
Bridge Trading Corporation Dba Bridge Shutter & More Active
License #884637 C-15, D28 +1 more Ontario, CA Est. 2006
Smith Brothers Glass Inc Active
License #885356 C-17 Ontario, CA Est. 2006
Plug & Play Home Tech Active
License #886283 C-7 Ontario, CA Est. 2006
Pro Source Painting Active
License #888195 C-33 Ontario, CA Est. 2006
Hernandez Wrought Iron Inc Active
License #888282 C-23 Ontario, CA Est. 2006
Senor Septic Construction & Pumping Active
License #888517 C-42 Ontario, CA Est. 2006
Xact Window Tinting Active
License #889275 D52 Ontario, CA Est. 2007
Just In Time Communications Inc Active
License #890177 C-7 Ontario, CA Est. 2007
Dove Construction Active
License #890352 B, C-33 Ontario, CA Est. 2007
Hasson'S Landscaping Active
License #891023 C-27 Ontario, CA Est. 2007
Just Everything Heating & Air Inc Active
License #892799 C-20 Ontario, CA Est. 2007
Solar Pro Electrical Solution Inc Active
License #893116 C-10 Ontario, CA Est. 2007
Kismet Construction Company Inc Active
License #893342 B Ontario, CA Est. 2007
Progressive Fueling Construction Inc Active
License #894043 A, HAZ Ontario, CA Est. 2007
Digital Technologies Inc Active
License #894551 B, C-7 +1 more Ontario, CA Est. 2007
Metro Rf Services Inc Active
License #895236 B, C-7 +1 more Ontario, CA Est. 2007
Erwin Advanced Air Systems Active
License #897796 C-20 Ontario, CA Est. 2007
Brian Yawching Kao Active
License #897876 B, C-10 +2 more Ontario, CA Est. 2007
Pro Insulation Inc Active
License #898228 C-2 Ontario, CA Est. 2007
Ortiz Demolition Incorporated Active
License #902123 C-12, C-21 Ontario, CA Est. 2007
Fuentes Construction Co Active
License #902863 B Ontario, CA Est. 2007
Daylight Solar Energy Corp Active
License #903293 B, C-10 +1 more Ontario, CA Est. 2007
Hci Systems Inc Active
License #905493 C-7, C-10 +1 more Ontario, CA Est. 2007
Zsolt Simon Wood Woorks Active
License #906047 C-6 Ontario, CA Est. 2007
Lyden Electric Active
License #909209 C-10 Ontario, CA Est. 2008
D A Painting Active
License #909401 C-33 Ontario, CA Est. 2008
Powerhouse Grading Inc Active
License #909465 A Ontario, CA Est. 2008
Norton General Contractors Active
License #909595 B, C-10 +1 more Ontario, CA Est. 2008
Victor Romero Active
License #911371 B Ontario, CA Est. 2008
Design Windows & Doors Inc Active
License #912367 B, C-17 Ontario, CA Est. 2008
F C Formsetter & Concrete Active
License #912473 C-8 Ontario, CA Est. 2008

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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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