건물 means "any kind of building" 빌딩 means "high-rise office building" ex) 그 건물은 주택으로는 부적당하다 The building is not fit to live in. 건물 공사가 완료 되었다. The construction of a building is completed. 영업부는 저희 빌딩 10층에 있습니다. The Sales Department is on the tenth floor of our building. 이 빌딩에 고속 엘리베이터가 있었으면 좋겠어요. I wish this building had an express elevator.