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One Madison Avenue's Renovation, Expansion Ramps Up in NYC

Tue January 19, 2021 - Northeast Edition
Yimby


Rendering of One Madison Avenue's expansion and renovation, designed by Kohn Pedersen Fox.
Rendering of One Madison Avenue's expansion and renovation, designed by Kohn Pedersen Fox.

Construction activity is under way at One Madison Avenue in the Flatiron District of Manhattan, N.Y., where the 13-story full-block structure is being renovated and expanded with a new 18-story addition.

Designed by Kohn Pedersen Fox and developed by SL Green, both headquartered in the city, the project will stand 27 stories and yield 1.4 million sq. ft. of Class A office space.

Helping to develop and finance One Madison Avenue's future are the National Pension Service of Korea and Hines, the real estate investment firm, contributing a grand total of $1.25 billion in construction financing.

The property is bound by East 23rd Street to the south, Madison Avenue and Madison Square Park to the west, East 24th Street to the north and Park Avenue South to the east.

Recent photographs show a large amount of scaffolding extending around the western and southern elevations. Most of the 13-story podium, which sits directly next to the 111-year-old Metropolitan Life Tower, is already covered. Two tall renderings adorn the thin sheathing at the southwestern corner of the property by the intersection of East 23rd Street and Madison Avenue.

The vertical expansion is poised to provide 530,000 sq. ft. of column-free space surrounded by a sleek glass envelope and dark-colored mullions that span every three stories. Each floor can yield a maximum of 35,000 sq. ft.

Office amenities for tenants include landscaped outdoor terraces on the 10th and 11th floors that measure more than an acre in size, a 15,000-sq.-ft. artisanal food market, a 9,000-sq.-ft. tenant lounge, a three-level fitness center and bike storage.

A 13,000-sq.-ft. high-tech event space designed to accommodate up to 800 people also is part of the design program.

One structural detail of interest is a series of large diagonal steel trusses distinctly marking the contrast and separation between the old podium and the new addition of One Madison Avenue.

The podium will have its interiors gutted, and the fenestration's aluminum spandrels and windows will be removed to make way for a high-performance structurally glazed curtain wall. The limestone façade is to be restored in the transformation process, and a portion of the outside wall facing Madison Square Park will be taken out and replaced with a multi-story glass enclosure and a black metal and glass rectangular canopy.

SL Green also recently donated $250,000 to the Madison Square Park Conservancy to help the non-profit organization, which is licensed by the New York City Department of Parks and Recreation, manage and maintain Madison Square Park. The money will partly aid the construction of a new dog run and help mitigate the park's upkeep costs.

The new expansion of One Madison Avenue is expected to achieve WELL and LEED-Gold certification and be completed in 2024.




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