Friday, March 13, 2026

Blackstone Clean Energy Company Nabs Midtown Space for Second NYC Digs – Commercial Observer

Blackstone portfolio company Transmission Developers, which develops clean energy transmission projects, has secured space for a second New York City office, Commercial Observer has learned.
The company, which has offices in New York City, Albany and Vermont, took the entire 14,500-square-foot 20th floor at Cohen Brothers Realty‘s 623 Fifth Avenue, between East 49th and East 50th streets, according to the landlord’s in-house broker, Marc Horowitz.
Transmission signed a five-year lease Dec. 20 for space in the 36-story building, per Horowitz. The asking rent was $87 per square foot. 
The Blackstone company will move into the space in the second quarter. The office was formerly occupied by Doral Bank, which folded its U.S. presence in 2015 but remained in the building to wind down its national operations, Horowitz said.
Transmission is focused on developing two projects: the…

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