and the United-States National Bank. The structure was topped by a circular tower on the Battery side and a rectangular tower on the Broadway side. Kendall designed additional stories to the Washington Building in 1885, but sources disagree as to how this was undertaken. According to Fran Leadon, a two-story addition was built shortly after the Washington Building's completion, and another two-story expansion was added in 1886–1887. However, Christopher Gray of The New York Times mentions a single 4-story addition that was completed by 1887. Either way, following the expansion, the top story consisted of a mansard roof containing protruding dormers on its south face. After the expansions, the building was tall. Gray and a contemporary Real Estate Record article characterized the Washington Building as being 14 stories, but Moses King's 1893 Handbook of New York City and an 1896 Times article described the building as being 13 stories. The Washington Building Company hired Harry E. Donnell in 1908 to perform unspecified "internal improvements" on the structure. IMM renovation The International Mercantile Marine Company (IMM) was looking for a new headquarters by the early 20th century. The company had been founded by the financier J. P. Morgan in 1902 through the merger of numerous smaller companies. Because of its large size and abundant competition in the steamship industry, its operations ran with a "thin margin of safety". IMM's finances were negatively affected after the 1912 sinking of the , operated by its subsidiary White Star Line, but the company made significant profits from freight traffic during and after World War I. Its first office in New York City, located at the adjacent Bowling Green Offices Building, was first mentioned in its 1918 annual report. IMM bought the Washington Building in 1919 for $3 million. Due to a dearth of available office space in the neighborhood, IMM decided against constructing an entirely new structure. Instead, that November, IMM announced plans to renovate the existing structure. Walter B. Chambers designed the Washington Building's renovation. The dormers and oriels were removed; the roof was rebuilt; the facade was clad in a mixture of granite, marble, and limestone; and maritime-themed details were placed on the facade of 1 Broadway. In addition, the ground floor was redesigned to accommodate IMM's booking office. The renovation was performed in phases to minimize disruption to existing tenants, who were moved between offices as work proceeded. The process occurred