Unlike the classical office buildings, the fact that the building user belongs to a single company in the Türk Telekom Headquarters Additional Service Building has been one of the important factors shaping the project. With the vertical circulation and service units aside, the center of the tower structure was evacuated, and inner gardens and atriums that change in the middle space and connect with the facade were created. Flexible working spaces, which are mostly organized as open offices, establish a visual relationship with each other. The floors formed by bridges and inner gardens are generally arranged as meeting spaces and common resting areas with mini eating and drinking alternatives. In this sense, the building aims to be one of the important examples of the contemporary office concept and to offer an alternative working environment.