Central Warsaw is truly crammed, and many downtown developers are turning horizontal space into vertical space by building tall skyscrapers. But in no other setting in the world is a building’s height to width ratio as insanely preposterous as that of Warsaw’s Keret House. Welcome to the skinniest house in the world. Designed by Polish architect Jakub Szczęsny, the Keret House in Warsaw is wedged inside a four-foot crevice, nicknamed a “cushion of air,” between two buildings. The Keret House stretches over 30 feet tall but is simultaneously only 28 inches wide at its narrowest point—thinner than a stovetop—and just four feet wide at its widest. With just 46 square feet of floor space and a world record for narrowness under its name, the Keret House manages to fit a bedroom, a bathroom, a kitchen, and a two-beverage refrigerator in the span of three floors. Built in 2012, Szczęsny’s narrow masterpiece is legally classified as an “art installation” because it doesn’t meet Polish housing codes, but, in practice, it serves as a residence nonetheless. As of today, the Keret House is open to all visitors to Warsaw, so long as it’s not undergoing maintenance.


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