AKA: The GAP, Seattle

Structure Type: built works - commercial buildings - commercial buildings

Designers: Mendel, Louis L., Architect (firm); Louis Leonard Mendel Sr. (architect)

Dates: constructed 1914-1915

4 stories, total floor area: 79,957 sq. ft.

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1530 5th Avenue NE
Downtown, Seattle, WA 98101-1604

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The O'Shea Building also had the address 501 Pine Street.


Seattle architect Louis L. Mendel (1867-1940) designed the O'Shea Building in 1914, with its completion occurring in 1915. Its original ground-floor tenant was the White Public Market. (Thank you to Rob Ketcherside for providing information on the O'Shea Building in an email to the author, 01/19/2016.)

Building History

Mendel designed a four-story reinforced concrete block for his client.

In 2016, the O'Shea Building Company of Seattle owned the building.

Building Notes

In 2016, the O'Shea Building occupied a 13,560-square-foot (.31-acre) lot, and contained 79,957 gross square feet, 65,417 net. In the gross square footage calculation, second floor office space contained 31,153 square feet, first-floor retail had 35,694 square feet, and the basement retail space measured another 13,110 square feet. (In terms of net square footage, the three floors had 26,082, 26,225 and 13,110 respectively.)

Gensler had its offices in the O'Shea Building c. 2016. The Gap clothing store occupied the first-floor retail space at this time.


Major alterations occurred in 1995 and in 2000.