Analysis of Score Acquisition Characteristics in the Ecological Environment Category of Green Building Certification for Residential Buildings - Focused on Certification Data from 2017 to 2024 -

Purpose: This study evaluates the practical effectiveness and discriminative integrity of the ‘Ecological Environment’ category within the G-SEED (Green Standard for Energy and Environmental Design) framework. Given the increasing importance of carbon neutrality and climate crisis response, it aims to provide robust empirical evidence for future standard revisions by diagnosing the current difficulty levels and differentiation capabilities of specific certification items. Method: The research conducted a comprehensive analysis of preliminary certification data from 3,018 residential buildings, categorized into General and Multi-family housing, approved between 2017 and 2024. Statistical analysis primarily focused on normalized achievement rates, grade distributions, and non-achievement frequencies for each assessment item to identify structural imbalances. Result: The findings reveal that average achievement rates were significantly low, recorded at 14.1% for General Housing and 24.0% for Multi-family Housing. Notably, the high-point item ‘Ecological Area Ratio’ demonstrated a severe loss of discriminative power, with 99.4% of General Housing cases clustered in the lowest achievement levels, leading to score reversals across certification grades. Furthermore, extreme non-achievement rates, such as 92.4% for ‘Linked Green Networks’ in Multi-family Housing, highlight the critical obsolescence of certain criteria in contemporary practical design.