The new 7 World Trade Center was completed in 2006 as a replacement to the original which was destroyed in the September 11th attacks.
Exterior of the Massive Dynamic building first seen in episode #101 and used through the series.
Shaw poses as an employee of the data mining company in order to keep an eye on Wayne Kruger in episode 3x02 "Nothing to Hide".
Reese listens in on the Drakes' conversation with their lawyer and later Fusco comes inside to stop Nestor Santiago from killing Sabrina Drake in episode 2x08 "Til Death".
Source: NYC Permits List