Seongsu-dong in Seoul’s Seongdong District is evolving from a destination for restaurants, cafes, pop-up stores and fashion brands into a potential Seongsu Business District (SBD), alongside Seoul’s Central Business District, Gangnam Business District and Yeouido Business District. Foreign tourists have become an increasingly important source of growth: foreign-card sales at CU outlets in Seongsu rose 115.1% year on year in the first half, according to data provided by BGF Retail, operator of South Korea’s largest convenience store chain by outlet count. The increase exceeded growth of 35.3% in Myeong-dong and 32.5% in Hongdae. In Seongsu 2-ga 3-dong, the core area between Exit 3 of Seongsu Station on Seoul Subway Line 2 and Yeonmujang-gil, total card spending reached 350.3 billion won in the first seven months of this year, nearly matching the 367.7 billion won recorded throughout 2024; foreign tourists accounted for 54.4%. Visitor numbers rose from about 22,000 in 2021 to about 2.228 million last year, while 1.98 million visited through July this year. Rising rents and corporate investment are reshaping the neighborhood, with at least 600,000 square meters of office space expected over the next five to six years, although the pipeline creates oversupply concerns.