The policy on energy plays an important role in Korea’s sustainable construction. The purpose of this study is to provide a broad overview of the policies related to building energy efficiency in Korea. Through this work, this paper suggests visions for extending sustainable building in Korea. This study investigates major policy measures related to the improvement of energy efficiency of buildings. Also, this thesis proposes policy measures to reinvigorate building energy efficiency and detailed programs for sustainable building. In conclusion, the findings from this study are discussed in measures to improve energy conservation in buildings for the future.