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Extell Development Closes $500M Purchase for 700K SF Manhattan Office Project

Extell Development acquires a block-long Midtown Manhattan development site at 405-417 Park Ave. for $500 million, securing potential for 700,000 square feet of office space.

By Colin Percy · May 18, 2026

Extell Development has finalized a $500 million acquisition of a prime block-long site located between East 54th and East 55th streets at 405-417 Park Ave. in Manhattan. The project adds to the developer's extensive holdings in the Plaza District and offers a development capacity of up to 700,000 square feet of office space. As part of the transaction, Extell also secured $20 million in air rights from the neighboring Central Synagogue.

The site was acquired from Swedish investor Corem Property Group AB and German asset manager DWS. While formal plans remain undisclosed, the acquisition positions Extell to pursue a significant office or mixed-use development, potentially joining the corridor’s wave of trophy tower projects. The developer is also reportedly negotiating to acquire the adjacent property at 110 E. 55th St. from the Parkoff Organization.

Companies mentioned

broker

Newmark

owner

Parkoff Organization

developer

Extell Development

owner

DWS

owner

Corem Property

other

Fried Frank

other

Central Synagogue

broker

CBRE

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