Evaluating Sustainable Sites, Location and Transportation, and Energy Performance : LEED criteria in a platinum-certified DGNB building

Abstract

This study evaluates a DGNB Platinum–certified building against selected LEED v4 BD+C criteria, Location & Transportation, Sustainable Sites, and Energy Performance using the Troplo Kids daycare center in Hamburg, Germany, as a case study. A mixed‑methods design combined quantitative measures (transit stop distance, land‑use density, envelope U‑values) from geospatial datasets and technical reports with qualitative analysis of site observations and design documentation. In Location & Transportation, the project scored 10.5 out of 12 points (87.5%), benefiting from proximity to U-Bahn (750m) and bus (250m), high surrounding density, diverse local amenities, and full bicycle facilities. However, it underperformed in parking reduction and green-vehicle infrastructure. In Sustainable Sites, it achieved 3 of 6 points (50%) by providing 76% open space (30% vegetated) and a comprehensive site assessment, yet did not meet the LEED thresholds for heat-island mitigation or greenfield preservation. Energy Performance revealed opaque U-values of 0.16 W/m²K, triple-glazed U-values of 1.14 W/m²K, and a 58.2% reduction in final energy consumption compared to EnEV 2009 benchmarks, indicating potential maximum LEED energy points. The building’s normalized mini‑rating of 75 % corresponds to LEED Platinum certification. The dual certification outcome highlights the complementary strengths of DGNB’s life cycle-oriented, context-sensitive assessment and LEED’s quantitative, performance-driven benchmarks. Findings highlight the importance of integrated design strategies for transit‑oriented development, ecological site stewardship, and high‑performance envelopes, offering guidance for harmonizing international standards with regional practices and informing designers, consultants, and policymakers in pursuing dual or hybrid certification