The repurposing of historic Tammany Hall at 100 East 17th Street, Union Square, into an iconic home to high-end tech tenants. CNY developed and implemented an elaborate plan to raze the building while maintaining the landmark façade. This bracing scheme from the exterior allowed the outer walls to be decoupled from the building behind the façade so the building could be demolished, leaving only the façade standing until new the new structure was built and reanchored to the façade. As a result an additional 20,000 SF of building area was created through this redesign.

Federally landmarked, the 3-1/2 story, neo-Georgian building constructed in 1929 was inspired by Federal Hall on Wall Street where George Washington was inaugurated and incorporated oversize red bricks modeled after those used by Thomas Jefferson at Monticello.