International audienceThis chapter presents the main conclusions of two comparative research programmes exploring urban energy transformations, specifically energy for buildings and economic activities. Their starting point is rooted in a body of work dedicated to energy transition, a notion extensively employed in academic circles and, since the 1992 Rio Summit, increasingly associated with cities: “Cities, as entities within which an ever-larger share of energy is used, are seen as simultaneously constituting a key target of such an energy transition, as well as a key ‘instrument’ in delivering it” (Rutherford & Coutard 2014, p.2). The emphasis placed on the growing role of cities in the transformation of energy systems historically domin...