·One Madison
Flatiron · Condominium

One Madison

618 ft · 51 floors · completed 2013 · CetraRuddy
The pencil tower on Madison Square Park that outlived its first developer.

One Madison is a luxury residential condominium tower located on 23rd Street between Broadway and Park Avenue South, at the southern end of Madison Avenue, across from Madison Square Park in the Flatiron District of Manhattan, New York City. The building's official address and main lobby entrance is at 23 East 22nd Street, rather than at 1 Madison Avenue; there is no public entrance on 23rd Street.

100 recorded sales, the highest $43.01M in 2014, the latest $3.9M in October 2025.

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