93 The Lotte World Tower stands 555.7 metres tall and has 123 floors above ground , with an additional six below . Its exterior design draws influence from Korean ceramics , porcelain , and calligraphy . Its tapered design points from its location in the Songpa-gu district towards the old centre of the city in Myeongdong . Inside , the building is divided into a number of commercial and public functions , including retail spaces , offices , a 7-star luxury hotel , and an officetel : a common feature of South Korean real estate which offers studioapartments for people who work in the building . The tower ’ s top 10 stories are earmarked for extensive public use and entertainment facilities , including an observation deck and rooftop café . Construction on the Lotte World Tower began in 2011 and was completed in 2017 . constructionglobal . com