Home Page
Link to Seattle Department of Neighborhoods home page

Seattle Historical Sites

New Search

Summary for 4580 COLORADO AVE / Parcel ID 3573200050 / Inv # 0

Historic Name: Bloch Steel Industries Common Name: Bloch Steel Industries
Style: Vernacular Neighborhood: Duwamish
Built By: Year Built: 1930
Plat: Industrial Add, Block: 3, Lot: Portion

This vernacular building dates from 1930. It dates from somewhat later than some examples of vernacular heavy timber buildings in the Industrial District. It is notable for its shape and original workmanship, but has few other outstanding architectural characteristics. On the other hand, it appears to have changed little since it was built. It has long been part of M. Bloch & Company, now best known for Bloch Steel Industries, its major subsidiary. M. Bloch apparently bought the shed in 1938, so the building predates its ownership by Bloch Steel Industries. Bloch Steel Industries specializes in the processing of scrap iron and is a steel distribution center. According to its website, it has been serving the Pacific Northwest and Alaska since 1935. The larger company also deals with other types of recycling and machining.

Additional Sources

Bloch Steel Industries, website at <>, accessed May 31, 2010.

“M Bloch & Co Inc,” MacRae’s Bluebook, (“Industrial Directory since 1893),

<>, accessed May 31, 2010


This building is located on the east side of Colorado Avenue South, north of Alaska Street. It is part of a larger property, occupied by M. Bloch and Company, located along Colorado Avenue South between Denver Avenue South and Alaska Street, with an eastern boundary along Utah Street. The building has a rectangular plan, approximately 36 feet by 85 feet. It is a simple heavy timber shed building, which is topped by a very narrow monitor roof. Outside of the monitor windows, which are closed off, the building has few visible openings. There is a laterally sliding door on the main elevation facing Colorado Avenue South. Original shiplap siding and remains of original corner boards are also distinguishing characteristics of the building.

Detail for 4580 COLORADO AVE / Parcel ID 3573200050 / Inv # 0

Status: Yes - Inventory
Classication: Building District Status:
Cladding(s): Other, Wood Foundation(s): Concrete - Poured
Roof Type(s): Monitor Roof Material(s): Asphalt/Composition-Shingle
Building Type: Commercial/Trade - Warehouse Plan: Rectangular
Structural System: Braced Frame No. of Stories: one
Unit Theme(s): Manufacturing/Industry
Changes to Plan: Slight
Changes to Original Cladding: Slight
Major Bibliographic References
King County Property Record Card (c. 1938-1972), Washington State Archives.
Drawings, Microfiche Files, Department of Planning and Development.

Photo collection for 4580 COLORADO AVE / Parcel ID 3573200050 / Inv # 0

Photo taken Mar 07, 2010
App v2.0.1.0