IFT Plaza is the building where IFT is located and where Ingram and Finch developed the Machine. Finch later worked there as an ordinary employee for 17 years until he quit the job in 2011. (“Ghosts”)
The building has at least 36 floors. Most appear to be offices for different departments. Finch had a small desk in a cubicle; Ingram's office was located on a high floor.
Nathan Ingram's bust can be found in the lobby.
In the series
The entire building is dedicated to IFT and the Machine refers to it as IFT Plaza or IFT Courtyard. (“Ghosts”)
Real life location
The "101" logo and a "101 Park Avenue" floor plan are visible as Finch exits the building in “Ghosts”.