From the 1970s, Yeouido grew as a political, financial, and cultural center, also becoming a key business district in Seoul. Since 2010, amidst skyscrapers like IFC Mall and Park One, Shinhan Securities Tower has maintained a unique presence with a distinguished architectural presence. The site overlooks Yeouido Park and fronts Yeouidaero Thoroughfare, and is within a 5-minute walk from Yeouido Station, providing excellent infrastructure for office facilities. To emphasize the building’s symbolic significance and its advantages as a landmark that has maintained unique value and historicity amidst a changing environment, the design seeks to create a new sense of place by leveraging the tension arising from the stark contrast between the preserved original structure and the vertical extension.

The building is divided into four parts: the lower levels called the moat, the lobby the podium, the original circular building the castle, and the vertical addition the watchtower. These embody spaces symbolic of both preservation and extension. The moat features a multi-level promenade and an underground-connected linear landscape vitalizing the commercial street at the lower level. The podium design enhances the lobby and amenities to ensure openness, increasing accessibility and visibility, and improving user experience through green walkways and a redesigned entry sequence. The castle design maximizes exclusive floor area — which determines the value of typical office floors — without adding cores, while considering views to Yeouido Park. The watchtower vertical extension utilizes a curtain wall to maximize views and an eccentric core design to optimize spatial efficiency, fostering new value creation.