Seoul has three main office districts, each pulling a different crowd. The Central Business District around Gwanghwamun and Jung-gu is the oldest commercial hub. Hyundai, LG, Microsoft, Citigroup and Morgan Stanley all have addresses here. Vacancy sat at 4.1% in Q3 2025. Seoul Finance Center and Project 107 are among the most traded buildings, with Societe Generale among recent movers. Gangnam Business District in Gangnam-gu and Seocho-gu is the tightest market in the city, with vacancy at just 1.5% in Q3 2025. Samsung Town in Seocho is a major anchor. Amazon, Naver, Datadog and Viva Republica all signed leases here recently. Tech, pharma, media and luxury brands tend to cluster in this area. Finding available Grade A office space to rent in Gangnam is genuinely hard right now. Yeouido Business District on Yeouido island is Seoul's financial centre. LG Electronics, Hanjin Shipping, Mirae Asset, IBM, Deloitte, Allianz and Ernst & Young are based here. YBD recorded the strongest rental growth among Seoul's three main districts in 2025, pushed along by refurbished prime buildings like TP Tower and One Centinel. Toss Bank's move into Opus 459 was one of the headline deals of the year. Beyond these three, Magok in the west is picking up aviation and construction tenants, and Mapo and Yongsan are growing with tech and media companies.