abstract
Between 1960s and 1970s Engineers, planners, geographers scholars started to metaphorically compare cities and territories with live organism, coining the word Urban Metabolism (UM). Since then, the metaphor was increasingly used to understand and explain the interrelation between human society and the different territorial systems (Gandy, 2014[i]). It could be argued that UM is not a unified field but rather ranges of different approaches (Gandy, 2014). Therefore, UM has been used as a lens towards a building an urban/regional analysis of flow that has resulted in the development of circular buildings, cities and region models. At the base of this models, there is Circular Economy (CE) approach towards a sustainable built environment, as “a restorative economy, and one which aims to maintain the utility of products, components and materials and retain their value” (EMF,2015).