The Master Apartments, officially known as the Master Building, is a 27-story Art Deco skyscraper at 310 Riverside Drive, on the Upper West Side of Manhattan, New York City. It sits on the northeast corner of Riverside Drive and West 103rd Street. Designed by Harvey Wiley Corbett of the firm Helmle, Corbett & Harrison, in conjunction with Sugarman & Berger, the Master Apartments was completed in 1929 as the tallest building on Riverside Drive. It was the first skyscraper in New York City to feature corner windows and the first to employ brick in varying colors for its entire exterior.