The 77th Street station was constructed as part of the Fourth Avenue Line. The plan for the line was initially adopted on June 1, 1905, before being approved by the Appellate Division of the Supreme Court of New York on June 18, 1906 after the Rapid Transit Commission was unable to get the necessary consents of property owners along the planned route. The Rapid Transit Commission was succeeded by the New York State Public Service Commission (PSC) on July 1, 1907, and the PSC approved the plan for the line in October and November 1907.