This 20-story condominium apartment building, however, has used the air-rights from the low-rise apartment building with fire escapes, immediately to its east, to cantilever part of its bulk over that building, a rare phenomenon in the city.

The building has a doorman, a concierge, a health club, a children’s playroom, a library, a screening room, wine cellar, and storage, and is pet-friendly.

Construction on the new building began in 2004. It is cantilevered at its seventh floor on its east side. The building, which has 84 units, has a setback above its 13th floor. The developer of this building is Jelee LLC.

Costas Kondylis was the architect.

The building is across the street from a newsstand and Saint Monica s Catholic Church, and it is on the former site of Phillips auction house. It is adjacent to a slightly taller, but setback, apartment tower on the southeast corner, at First Avenue.

This location is not convenient to subways, but there is good bus service on 79th Street and York Avenues, and there is an downtown entrance to the FDR Drive, at the east end of 79th Street.

Carl Schurz Park and a couple of the city’s top schools for girls are a few blocks away to the east and north.