Licensed Contractors in Ontario, California

All license data is sourced from the California Contractors State License Board (CSLB). Last data update: February 20, 2026.

Contractors by Classification

General Contractors

B: General Building Contractor (341) A: General Engineering Contractor (63) B-2: Residential Remodeling Contractor (4)

Specialty Contractors

Show all 63 specialty classifications

R J P General Contracting Active
License #659596 B Ontario, CA Est. 1992
Spicer Construction Active
License #662772 B Ontario, CA Est. 1993
Atlantic Refrigeration & Appliances Active
License #662919 C-20, C-38 Ontario, CA Est. 1993
Valley Carpets Active
License #663198 C-15 Ontario, CA Est. 1993
Island Construction & Maintenance Active
License #667042 B, C-10 +2 more Ontario, CA Est. 1993
Rodriguez Brothers Engineering Inc Active
License #670969 A, C-42 Ontario, CA Est. 1993
Marco A Yanez Active
License #673547 C-10 Ontario, CA Est. 1993
Joseph Construction Active
License #674654 B Ontario, CA Est. 1993
C M Construction General Contractors Inc Active
License #677379 B Ontario, CA Est. 1993
Sierra Construction Active
License #681123 B Ontario, CA Est. 1993
J L G Construction Active
License #683195 B Ontario, CA Est. 1993
Espinoza Roofing Active
License #686396 C-39 Ontario, CA Est. 1994
Eric Castaneda Active
License #687603 B Ontario, CA Est. 1994
Chava'S Marble & Tile Active
License #692159 B, C-54 Ontario, CA Est. 1994
Dong Suk Suh Dba Seasons Painting & Construction Co Active
License #692214 A, B +1 more Ontario, CA Est. 1994
Bill Marino Active
License #696015 C-39 Ontario, CA Est. 1994
Perfect Construction Co Active
License #696650 B Ontario, CA Est. 1994
Ho Soo Yoo Active
License #703553 B, C-10 +2 more Ontario, CA Est. 1995
Castillon Flooring Contractor Active
License #704444 C-15 Ontario, CA Est. 1995
Cornerstone Carpentry Active
License #707735 C-6 Ontario, CA Est. 1995
Martinez Steel Corporation Active
License #708227 C-50 Ontario, CA Est. 1995
All Trade Decking Active
License #708790 D12, D41 Ontario, CA Est. 1995
Holmes Pool Service Active
License #709386 D35 Ontario, CA Est. 1995
Amilcar M Castillo Active
License #711675 B Ontario, CA Est. 1995
Warren Collins And Associates Inc Dba Collins Company Active
License #715532 D03, D64 Ontario, CA Est. 1995
Anna Earley Dba Epoxy Construction Services Active
License #721740 D12 Ontario, CA Est. 1996
California Door Doc Active
License #723866 D28 Ontario, CA Est. 1996
Wavcomm Active
License #724434 B, C-10 Ontario, CA Est. 1996
Edward Ruiz Active
License #726100 C-15 Ontario, CA Est. 1996
Clark General Contracting Inc Active
License #726205 B, C-23 Ontario, CA Est. 1996
All - Right Roofing Llc Active
License #726974 C-39 Ontario, CA Est. 1996
Richard Joe Saenz Active
License #727122 B Ontario, CA Est. 1996
Ics Intelesys Inc Active
License #729063 C-7 Ontario, CA Est. 1996
Belanger Electrical Services Active
License #729646 C-10 Ontario, CA Est. 1996
Rodney Glenn Wolcott Active
License #730955 C-10 Ontario, CA Est. 1997
Michael Anthony Painting Active
License #731128 C-33 Ontario, CA Est. 1997
David Leung Active
License #731215 B, C-15 Ontario, CA Est. 1997
Best Value Solar Energy Systems Active
License #733942 C-46 Ontario, CA Est. 1997
B Fries Construction Inc Active
License #735157 B Ontario, CA Est. 1997
Signature Signs Active
License #737465 C-45 Ontario, CA Est. 1997
Simington Painting Company Active
License #739139 C-33 Ontario, CA Est. 1997
Diversifab Inc Active
License #740419 D64 Ontario, CA Est. 1997
Regal Industries Inc Active
License #740801 C-33, D12 Ontario, CA Est. 1997
J S Painting Co Active
License #741595 C-33 Ontario, CA Est. 1997
Material Flow Systems Inc Active
License #741699 D21 Ontario, CA Est. 1997
Thor Mc Andrew Construction Active
License #742776 B Ontario, CA Est. 1997
Lytle Landscape Construction Active
License #743494 C-27 Ontario, CA Est. 1997
Alliance Communication Services Inc Active
License #746796 B, C-7 Ontario, CA Est. 1998
Tom Arriola Flooring Active
License #747719 C-15 Ontario, CA Est. 1998
Rico Painting Active
License #750696 C-33 Ontario, CA Est. 1998

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