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The illustrious firm Howard and Galloway designed the Adam Grant Building; architect/educator John Galen Howard (1864-1931) was the firm's principal designer. In 2005, plans were made to turn the Grant Building into commercial office condominiums; this would be one of the earliest commercial condominiums in San Francisco, CA.

The Adam Grant Building had its main entrance at 100 Sansome Street, and a lateral entrance at 134 Bush Street.

Eight stories were added to the existing six in 1926, as the building changed from retail and manufacturing to office space usage. The original occupants were a dry goods wholesale business and a manufacturing firm. According to the web site of Spear Street Capital, the Grant Building's owner in the late 1990s: "After acquisition, we fully renovated five office floors and executed direct leases with major sub-tenants. Two leases were signed for highly visible retail spaces near the main entrance. The property was sold within two years at a substantial premium to our investment in the asset." (See Adam Grant Building | San Francisco, CA,"Accessed 05/10/2012.)