J. Zuo, L. Daniel, V. Soebarto (eds.), Fifty years later: Revisiting the role of architectural science in design and practice: 50 th International Conference of the Architectural Science Association 2016, pp. 1–10. ©2016, The Architectural Science Association and The University of Adelaide. Net regeŶerative regioŶal developŵeŶt: iŵpleŵeŶtatioŶ iŶ the ŵasterplaŶŶiŶg stage of a 680 hectares case study Dominique Hes, André Stephan and Sareh Moosavi The University of Melbourne, Melbourne, Australia dhes@unimelb.edu.au, sareh.moosavi@unimelb.edu.au, andre.stephan@unimelb.edu.au Abstract: A positive vision for the future of humanity can be the basis for a needed change, a vision of opportunity, abundance and the potential for thriving. Regenerative development can provide a pathway towards this vision. Case studies are beginning to show that when applied, the concepts underpinning regenerative development can accelerate a transition to more equitable, sustainable, post fossil carbon societies. Net Regenerative Regional Development (NRRD) is development that supports the health and vitality of a region through mutually beneficial relationships between all the stakeholders and flows of the system. Though in its infancy in application, NRRD is based on the accumulation of millennia of human knowledge and provides us an opportunity to positively change the often negative future predicted. The potential of NRRD is being investigated using a large project called Seacombe West in Gippsland, Victoria and its masterplanning process. The masterplanning process is being informed by regenerative development theory and the facilitation process by the Living Environments in Natural, Social and Economic Systems (LENSES) framework. This study shows that planning NRRD through the use of LENSES supported the emergence of more holistic and systemic guidelines which informed a masterplan that has greater regenerative potential. Keywords: Regenerative development; Design process; Large scale project; cross-disciplinary. 1. Introduction There has been a call from many areas of research and practice for a different approach to sustainable development in the built environment, because many of the social and ecological indicators that underpin our civilisation are being rapidly eroded; that is we are failing at our current approach to sustainability. Led by thinkers in the built environment such as McDonough and Braungart (2002), du Plessis (2011; 2013), Mang and Reed (2012), Lyle (1994), Plaut et al. 2011 and Cole (2012b) the call has gone out to approaches that facilitate built environment outcomes that move beyond marginal improvements and shift our focus towards creating vitality. Projects that begin to heal the damage done in the past and create vital relationships that lead to resilience, adaptive and thriving outcomes. As argued by Mang and Reed (2012), Cole (2012a), du Plessis (2012), Hes and du Plessis (2015), Robinson and Cole (2014) and Beer (2016), regenerative development is the leading theoretical framework to facilitate contributive development approaches.