Appeal to the Spread of Green Building on Existing Building Sector by G-SEED Certification Status and Standards Proposal

In the building sector, various policies and standards, including building energy reduction design standards, green building certification, and zero energy building certification have been implemented for reducing energy use and greenhouse gas emissions. However, the existing standards and policies have been prepared for new buildings, and the review of existing buildings is insufficient. Therefore, in this study, we reviewed the current policies and standards in relation to existing buildings and analyzed the acquisition status of green building certification. In addition, through the analysis of acquisition status for each certification criterion, the limitations of the current certification standards and scope of improvement were suggested. Consequently, measures to improve the evaluation criteria were derived, such as applying the actual energy-saving rate to existing buildings and expanding the scope of certification for green building materials. Through this study, the acquisition and application of green building certification for existing buildings are expected to proceed.