1 What does built environment practice look like in the ecological worldview Speakers: Hes, D 1 ; du Plessis, C 2 1 The Faculty of Architecture, Building and Planning; The University of Melbourne, Melbourne, Australia 2 Department of Construction Economics, University of Pretoria, Pretoria, South Africa Abstract: We are starting to see the increased impact of humanity on the environment, to the point that it is inhibiting our ability to thrive in the future. This paper builds on others pointing to the critical reason for this being the worldview currently framing how the western world sees progress and success and therefore what sustainable development means. In critiquing this approach to sustainable development the authors present an alternative: the ecological worldview. The paper will introduce what this worldview is and will analyze interviews with fifty two practitioners in the built environment who, it will be argued, are starting to practice within this worldview. Thought this process the paper will illustrate ten potential values that could underpin and guide practice in the built environment and therefore propose the framework for a potential assessment tool. Keywords, Ecological Worldview, Regeneration, Revisioning Sustainability Introduction After decades of working on sustainability (and in the built environment working on sustainable, green, high performance buildings), findings from a number of recent international studies, such as the 2014 IPCC assessment report on climate change, indicate that the situation is getting worse, not better; prompting the World Watch Institute, in their 2013 State of the World report, to ask whether sustainability is still possible [1]. A key premise of this paper is that the reason we are not succeeding in reducing our impact is the framework within which we currently practice, make decisions and do our research; and that for meaningful change to occur in practice, we need to change this framework. Our current framework structuring sustainability practice is couched in the language of quantitative, performance-based indicators reporting on performance in isolated categories, compliance with which is largely driven by individual interest: reputational, financial, or simply avoiding prosecution. Much has been written about the flaws in this framework and its foundation in the so-called mechanistic worldview, as well as the need to shift towards a more relational worldview that will help us develop frameworks suitable for working with living systems[2],[3]. This paper will not engage with this debate, but accept the need for a shift to an ecological worldview.