Urban Efficiency II: Seven Innovative City Programmes for Existing Building Energy Efficiency builds on research in the successful predecessor “Urban Efficiency” Report and captures seven new detailed city case studies from C40 member cities. It is primarily targeted at city-level policy makers and decision makers across the world. The report increases the resource and evidence base available to support cities understanding of the characteristics and impact of innovative city programmes emerging across C40 cities, that advance operational energy efficiency and retrofitting in existing, privately owned buildings.