A ‘20 minute city’ is one in which most people are able to undertake most activities needed for a good life within a 20 minute walk, cycle or public transport trip from where they live. This Policy Paper puts forward that a neighbourhood structure embedded in a 20 minute city, with good local and regional transport choices, is likely to promote many positive outcomes in terms of personal and societal wellbeing, enhance liveability (which is already a strong international brand for our cities), as well as being cost effective to service and supportive of increased economic productivity. Flowon effects will include lower traffic congestion levels, improved health outcomes, lower accident costs, reduced emissions (greenhouse gases and air pollutants) and greater social inclusion.