Licensed Contractors in Clearlake Oaks, California
Clearlake Oaks has 21 licensed contractors registered with the California Contractors State License Board across 14 trade classifications. The most common specialties are Electrical Contractor (2), Flooring and Floor Covering Contractor (2), Low Voltage Systems Contractor (2). 9 contractors hold general contractor licenses (Class A or B).
All license data is sourced from the California Contractors State License Board (CSLB). Last data update: February 20, 2026.
Contractors by Classification
General Contractors
Specialty Contractors
C-10: Electrical Contractor
(2)
C-15: Flooring and Floor Covering Contractor
(2)
C-7: Low Voltage Systems Contractor
(2)
C-36: Plumbing Contractor
(2)
C-50: Reinforcing Steel Contractor
(1)
D49: Tree Service
(1)
C-27: Landscaping Contractor
(1)
C-9: Drywall Contractor
(1)
C-17: Glazing Contractor
(1)
D28: Doors, Gates and Activating Devices
(1)
Bernard Krahne
Active
License #366381
C-15
Clearlake Oaks, CA
Est. 1978
Ron Sugimoto Const
Active
License #437665
B
Clearlake Oaks, CA
Est. 1983
Audac
Active
License #445578
C-7
Clearlake Oaks, CA
Est. 1983
Don Cowden Const Inc
Active
License #550387
B, C-9
Clearlake Oaks, CA
Est. 1988
Cornerstone Construction
Active
License #562482
A, B
Clearlake Oaks, CA
Est. 1989
License #660056
C-17
Clearlake Oaks, CA
Est. 1992
Superior Garage Door Service
Active
License #744501
D28
Clearlake Oaks, CA
Est. 1998
License #752509
B
Clearlake Oaks, CA
Est. 1998
Hill Floor Service
Active
License #752520
C-15
Clearlake Oaks, CA
Est. 1998
High Valley Tile & Stone
Active
License #786309
C-54
Clearlake Oaks, CA
Est. 2000
Sumner Construction
Active
License #786894
B
Clearlake Oaks, CA
Est. 2000
License #838680
C-20, C-36
Clearlake Oaks, CA
Est. 2004
Arbeez Plumbing
Active
License #839136
C-36
Clearlake Oaks, CA
Est. 2004
Douglas Snyder
Active
License #872728
B
Clearlake Oaks, CA
Est. 2006
J G Construction
Active
License #885029
B
Clearlake Oaks, CA
Est. 2006
Tim Mulder
Active
License #993236
A
Clearlake Oaks, CA
Est. 2014
Fehrn Electric
Active
License #1031500
C-10
Clearlake Oaks, CA
Est. 2017
Hill Side Steel
Active
License #1087927
C-50
Clearlake Oaks, CA
Est. 2022
Green Tree Service
Active
License #1112024
D49
Clearlake Oaks, CA
Est. 2023
License #1137415
C-27
Clearlake Oaks, CA
Est. 2025
High Country Security
Suspended
License #961001
C-7, C-10
Clearlake Oaks, CA
Est. 2011