Founded in 2009, the San Francisco-headquartered company has blossomed to employ approximately 800 people worldwide.
Square also has offices in Atlanta, Kitchener-Waterloo, and Tokyo.
The new lower Manhattan location will accommodate at least 350 new employees, and Square boasted it is "actively" looking to hire engineers, designers, support representatives, and other business professionals.
Bolstering its portfolio for whatever the future holds, Square has been actively dabbling with new payments solutions as well as making a number of small purchases of its own here and there.
In February, Square Cash was introduced as a spinoff from the famous white dongle, serving as a new method that is simply as easy as CC'ing someone on an email.
Later that month, Square bought BookFresh, a private software company that makes apps for scheduling and managing appointments with the intent of growing businesses.
The additional line of service hinted Square is interested in providing a more well-rounded platform for small businesses and merchants far beyond just facilitating the digital exchange of money.
Along those lines, Square quietly started testing a new app called "Pickup," a service that actually refers to picking up lunch, slightly distinguishing it from the plethora of delivery services popping up via smartphones.