Metabolism and Urban Design: Insights from the Champs–Elysées, Paris

The urban metabolism concept is crucial for understanding city–environment interactions. Yet, its use in urban design is limited, and the examination of diverse design hypotheses with the potential to influence metabolic activities is seldom undertaken. This research addresses this gap and aims to analyze how the concept of metabolism (1) Can be leveraged by professionals for making urban design hypotheses, and (2) allows for the assessment of each of these hypotheses to reduce adverse environmental impacts and inform urban design decisions. Focusing on Paris’ Champs–Elysées redesign, in collaboration with PCA-STREAM, an urban design and architecture firm, this research employs fieldwork observations, tenant/store owner interviews, and specific metabolic models for water, energy, and materials. The results demonstrate that while redesigning the avenue’s public space potentially impacts the whole Champs–Elysées metabolism, this impact remains relatively limited. Intervening on objects with higher metabolic activities and using more efficient technologies might be more fruitful in terms of adverse environmental impact reduction, at least in this context.