The Sumner Iron Works was incorporated in 1892 by brothers Thomas B. Sumner and Frederick W. Sumner. They relocated their farm machinery and steam tractor business from Hutchinson, Minnesota, to Everett, Washington. The first Sumner Iron Works foundry was located on the east bank of the Snohomish River at the foot of Everett Avenue.
The Sumner Iron Works produced a wide variety of equipment including sawmill, marine, shingle, cannery, and mining machinery. The majority of the plant's work was dedicated to the lumber industry.
A fire devastated the Sumner Iron Works on April 4, 1913. Undaunted by the fire, and with several large sawmill orders to fill, the Sumners rented the old Phoenix Iron Works plant in Tacoma. They quickly chose a new location at 41st and 3rd Streets in Lowell to rebuild, and broke ground in August. By Christmas of 1913, the Sumner Iron Works was ready to move into its new facility. The plant was in full production by early 1914. Local photographer John A. Juleen documented the building of the new plant.