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)
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
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
License #939694
D21, D28
Ontario, CA
Est. 2009
Bright Eye Pool Service
Active
License #940135
C-53, D35
Ontario, CA
Est. 2009
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
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
License #955641
C-7, C-10
Ontario, CA
Est. 2010
Pona'S Construction
Active
License #955730
B
Ontario, CA
Est. 2010
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Licensing Resources
How to verify a contractor license
Deposit and payment rules for California contracts
Home improvement contract requirements