The northern section of the building contains a three-story wing. The Master Building has a shallow setback above the second story on its eastern elevation, as well as above the three-story wing on its northern elevation. Above the 14th story, the building sets back further into an irregularly massed "transitional" section with several setbacks, which rises to the 21st story. The octagonal tower rises above the transitional building. The single pinnacle contrasts with the multiple twin-towered buildings on Central Park West (namely the Century, the Majestic, the San Remo, and the El Dorado), which were all built following a change to the zoning regulations in 1929.
