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)
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
C P I Active
License #913123 B, C-13 Ontario, CA Est. 2008
Garcon Construction Inc Active
License #913550 A, C-8 Ontario, CA Est. 2008
Tom Foley Installations Incorporated Active
License #914990 C-6, D12 Ontario, CA Est. 2008
Pro Tech Plumbing Active
License #915091 C-36, C-42 Ontario, CA Est. 2008
Jewel Construction Inc Active
License #915742 B Ontario, CA Est. 2008
The Specialist Plumbing Active
License #915935 C-36 Ontario, CA Est. 2008
Northstar Phac Inc Active
License #916254 C-20, C-36 Ontario, CA Est. 2008
Phil'S Construction Active
License #916449 B Ontario, CA Est. 2008
Good Temperature Active
License #916498 C-38 Ontario, CA Est. 2008
Arijet Corporation Active
License #916562 A, C-7 Ontario, CA Est. 2008
Solorio Construction Active
License #917843 B Ontario, CA Est. 2008
Bonilla Construction Active
License #919777 B Ontario, CA Est. 2008
Stone Age Mason Active
License #919942 C-29 Ontario, CA Est. 2008
Diamond West Builders Active
License #921003 B Ontario, CA Est. 2008
All Star Mason Construction Active
License #921330 C-29 Ontario, CA Est. 2008
Orange West Plastering Active
License #921631 C-35, D39 Ontario, CA Est. 2008
Evies International Inc Active
License #924532 B Ontario, CA Est. 2008
Ibarra Electric Active
License #924579 C-10 Ontario, CA Est. 2008
Signum Lux Corp Active
License #925033 C-45 Ontario, CA Est. 2008
J P Pool Services Active
License #925284 D35 Ontario, CA Est. 2008
Santana'S Iron Work Active
License #926059 C-23 Ontario, CA Est. 2008
Tr Constructions Llc Active
License #926469 B Ontario, CA Est. 2008
Bcbc Construction Active
License #926682 B Ontario, CA Est. 2008
Electrical Services Active
License #926775 C-10 Ontario, CA Est. 2008
A - C Reglazing Active
License #927734 D12 Ontario, CA Est. 2009
Sandoval Active
License #927957 C-39 Ontario, CA Est. 2009
Exacto Builders Active
License #929047 B Ontario, CA Est. 2009
Johnnie Rightmer Active
License #929338 B Ontario, CA Est. 2009
Riccardi Floor Covering Inc Active
License #929568 C-15 Ontario, CA Est. 2009
Castle Contractor Active
License #933993 C-10, D28 +1 more Ontario, CA Est. 2009
John Fitzgerald Devine Active
License #934292 B Ontario, CA Est. 2009
Kemcorp Construction Inc Active
License #934522 A, B Ontario, CA Est. 2009
Top Rank Communications Inc Active
License #934552 C-7 Ontario, CA Est. 2009
Power Grade Inc Active
License #935306 A, C-10 Ontario, CA Est. 2009
Jeffrey Andrew Renne Active
License #935581 C-10 Ontario, CA Est. 2009
S C M Construction Inc Active
License #935736 B Ontario, CA Est. 2009
Samuel Elias Milam Active
License #937003 B, C-10 Ontario, CA Est. 2009
High Quality Group Active
License #938452 B Ontario, CA Est. 2009
R & S Overhead Doors Of Inland Empire Inc Active
License #939694 D21, D28 Ontario, CA Est. 2009
Bright Eye Pool Service Active
License #940135 C-53, D35 Ontario, CA Est. 2009
Custom Professional Electronics Inc Active
License #944235 C-7 Ontario, CA Est. 2010
Marcos Air Conditioning Active
License #950285 C-20 Ontario, CA Est. 2010
Expert Hardwood Flooring Active
License #950445 C-15, C-54 Ontario, CA Est. 2010
Proffitt Excavating Inc Active
License #952224 A Ontario, CA Est. 2010
Complete Pool Services Active
License #952530 C-53, D06 Ontario, CA Est. 2010
The Climate Controllers A Partnership Active
License #953750 C-20 Ontario, CA Est. 2010
Window Technique U.S.A Active
License #954479 D52 Ontario, CA Est. 2010
Water Solutions Active
License #954619 C-36 Ontario, CA Est. 2010

Get Quotes from Ontario Contractors

Compare quotes from licensed, pre-screened contractors in Ontario. Check ratings and reviews before you hire.

Find top-rated pros in your area →

Licensing Resources

How to verify a contractor license
Deposit and payment rules for California contracts
Home improvement contract requirements

↑ Back to top