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Aerial Rendering of proposed alterations and rooftop pavilion at 122 Fifth Avenue - Studios Architecture

122 Fifth Avenue’s Expansion Tops Out in Union Square, Manhattan

YIMBY attended a topping-out ceremony for 122 Fifth Avenue, a 11-story commercial building expansion in Union Square. Designed by STUDIOS Architecture and developed by Bromley Companies, the 300,000-square-foot project involves the erection of a one-story steel-framed addition above the parapet of the landmarked building, as well as the construction of a reinforced concrete annex that will expand the property’s T-shaped footprint along West 17th Street. Microsoft has signed on as the anchor tenant for the office space, and athleisure company Allbirds will occupy the retail space. Omnibuld is the general contractor for the Midtown, Manhattan property.

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Rendering of One Madison Avenue Expansion. Designed by Kohn Pedersen Fox

One Madison Avenue’s Concrete Core Begins Ascent in Flatiron District, Manhattan

Construction is set to begin on the new floors at One Madison Avenue, a 27-story office tower expansion in Manhattan’s Flatiron District. Designed by Kohn Pedersen Fox for SL Green, the project involves the gut renovation of the existing eight-story building and structural addition above its roof level, bringing the structure up to 1.4 million square feet of Class A office space. The National Pension Service of Korea and Hines are also part of the development team and acquired $1.25 billion in construction financing for the property, which occupies a full block bound by East 23rd and 24th Streets and Madison Avenue and Park Avenue South.

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Demolition Ramps Up for PENN15 Supertall at 15 Penn Plaza in Midtown, Manhattan

Demolition work is ramping up for PENN 15, a 56-story, 1,200-foot commercial supertall at 15 Penn Plaza in MidtownManhattan. Designed by Foster + Partners and developed by Vornado Realty Trust, the 2.7 million-square-foot tower will replace the aging Hotel Pennsylvania and stand as the tallest component in the 7.4 million-square-foot Penn District master plan. 401 Hotel Reit is the owner and Northstar Contracting Group is the demolition contractor for the property, which is bound by Seventh Avenue to the west, West 32nd Street to the south, and West 33rd Street to the north.

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231 East 51st Street Nears Completion in Turtle Bay, Manhattan

Exterior work is nearing completion on 231 East 51st Street, a five-story commercial office building in the Midtown East neighborhood of Turtle Bay. The 3,682-square-foot lot was once home to a prewar five-story structure that served as the Consulate of the Republic of Singapore. The property was sold to Texas-based travel firm Frosch in December 2017 for $22.05 million. Clune Construction is the general contractor for the project, which is located between Second and Third Avenues.

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Rendering of 660 Fifth Avenue

Macquarie Group Inks 222,000-Square-Foot Lease at 660 Fifth Avenue in Midtown Manhattan

Macquarie Group, a global financial services company, is the latest to join an expanding roster of new commercial tenants at 660 Fifth Avenue in Midtown Manhattan. As the tower’s anchoring tenant, the firm will occupy 221,764 square feet, spread across six floors, in addition to having a private lobby entrance on both the first and second floors, 30,000 square feet of private outdoor space, and top of building signage.

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