This document summarizes a presentation on rethinking sustainability towards a regenerative economy. It is supported by the EU Framework Programme Horizon 2020 and COST Action CA16114. The presentation discusses moving beyond sustainability to restoration and regeneration by enabling social and ecological systems to remain healthy and evolve. It provides definitions of sustainability, restoration, and regeneration. It also summarizes the work of Working Group 1, including their visions, themes, and triggers for moving towards a regenerative future built environment.