IPA Analysis-Based Sustainable Carbon-Neutral Space Design in LEED-Certified Facilities - Focusing on Common Areas in Commercial Spaces -

This study aims to propose sustainable space design strategies to achieve carbon neutrality in the common spaces of commercial facilities. As the construction sector significantly contributes to greenhouse gas emissions, it is essential to develop design guidelines that reduce energy use and improve user experience. Based on LEED V5 (ID+C) and Korea’s 2050 carbon-neutral policy, a checklist including space planning, natural lighting, eco-friendly materials, energy efficiency, and resource management was developed and applied to five LEED-certified facilities. Surveys of experts and users were conducted, and the results were analyzed using the Importance–Performance Analysis (IPA) method to evaluate both the importance and satisfaction of each design factor. This method provided a systematic framework to identify key priorities for sustainable design improvement. The findings revealed that spatial composition, material selection, and energy management are essential for carbon-neutral design. Strategies such as natural light inflow, recycling, low-carbon material use, and smart energy monitoring effectively reduce emissions while enhancing comfort and user satisfaction. Ultimately, this study presents practical guidelines and data that can support architects, designers, and policymakers in implementing carbon-neutral strategies in the built environment.