Licensed Contractors in Seattle, California
Seattle has 28 licensed contractors registered with the California Contractors State License Board across 15 trade classifications. The most common specialties are Electrical Contractor (3), Flooring and Floor Covering Contractor (2), Machinery and Pumps (2). 18 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
(3)
C-15: Flooring and Floor Covering Contractor
(2)
D21: Machinery and Pumps
(2)
C-36: Plumbing Contractor
(2)
D34: Prefabricated Equipment
(2)
D42: Sign Installation
(1)
C-39: Roofing Contractor
(1)
C-6: Cabinet, Millwork and Finish Carpentry Contractor
(1)
D24: Metal Products
(1)
D28: Doors, Gates and Activating Devices
(1)
Manson Construction Co
Active
License #220319
A
Seattle, CA
Est. 1963
Cochran Electric Co Inc
Active
License #265298
C-10
Seattle, CA
Est. 1970
Scarsella Bros Inc
Active
License #779354
A
Seattle, CA
Est. 2000
Refino Inc
Active
License #787509
B
Seattle, CA
Est. 2000
Bnbuilders Inc
Active
License #799131
A, B
Seattle, CA
Est. 2001
Roofcorp Of America Inc
Active
License #803718
C-39
Seattle, CA
Est. 2002
Manson / Connolly Jv
Active
License #814282
A
Seattle, CA
Est. 2002
Alfi Construction Inc
Active
License #819837
B
Seattle, CA
Est. 2003
O B Williams Company
Active
License #834772
C-6
Seattle, CA
Est. 2004
Costco Wholesale Corporation
Active
License #858087
B, C-10 +2 more
Seattle, CA
Est. 2005
Grindline Skateparks Inc
Active
License #910106
A
Seattle, CA
Est. 2008
License #910313
D21, D24 +2 more
Seattle, CA
Est. 2008
License #933558
C-10
Seattle, CA
Est. 2009
Dowbuilt Inc
Active
License #948772
B
Seattle, CA
Est. 2010
I S C Contractors Inc
Active
License #951891
B
Seattle, CA
Est. 2010
Concrete Restoration Inc
Active
License #954553
D06
Seattle, CA
Est. 2010
Krekow Jennings Inc
Active
License #954834
B
Seattle, CA
Est. 2010
Ocean Park Mechanical Inc
Active
License #986064
C-20, C-36
Seattle, CA
Est. 2013
Mckinstry Essention Llc
Active
License #992771
B
Seattle, CA
Est. 2014
Blue Water Graphic Signs
Active
License #1014803
D42
Seattle, CA
Est. 2016
License #1026712
C-15
Seattle, CA
Est. 2017
North American Terrazzo Inc
Active
License #1034792
C-15
Seattle, CA
Est. 2018
Triad Lagoon Valley Llc
Active
License #1076911
A, B
Seattle, CA
Est. 2021
Acg Builds Inc
Active
License #1112543
B
Seattle, CA
Est. 2023
Transco Northwest Inc
Active
License #1132984
D21
Seattle, CA
Est. 2025
Momentum Inc
Suspended
License #881004
B
Seattle, CA
Est. 2006
Lumenomics Inc
Suspended
License #981581
D52
Seattle, CA
Est. 2013
Pacific Pile & Marine Lp
Suspended
License #1049216
A
Seattle, CA
Est. 2019