Bookshelves add extra utility to the undulating staircase in Tokyo's 921-square-foot Coil house. The space was designed by architect Akihisa Hirata for Sakura and Ryo Sugiura, a young couple with two children.  Photo 11 of 35 in 35 Swoon-Worthy Staircases That Are a Step Above the Rest from A Tokyo Home With a Shape-Shifting Staircase Presents a Smart Solution to Small-Space Living

35 Swoon-Worthy Staircases That Are a Step Above the Rest

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In most multistory homes, stairs connect floors. But in the 921-square-foot Coil house, located in a quiet residential neighborhood in Tokyo, they are the floors. Defined by 44 steps of varying depths and widths, Coil is a dynamic swirl of continuously ascending spaces, designed by local architect Akihisa Hirata for Sakura and Ryo Sugiura, a young couple with two children.