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The Honolulu Advertiser referred to the sprawling Ewa plantation office, with its broad double-pitched hipped roof, as “a model of what might be called Hawaiian architecture.” Sitting on the hot Ewa plain, the board-and-batten building's configuration centered on a front patio surrounded by offices which are all single stacked to facilitate the flow of the cooling trade winds. “Designed for coolness and efficiency,” it utilized both casement and double-hung sash windows with shutters. A wing was added in 1939.