Urban designers and planners are increasingly being asked to create and maintain communities that are more socially, economically and environmentally sustainable. In the UK, numerous reports and policy documents have been published, outlining the relationship between sustainability and urban design. To achieve these high expectations, some decision makers have been exploring how buildings and open spaces develop from an idea to finished project and beyond. Knowing who is making decisions, what decision‐making tools are used and whether or not sustainability is considered can help those involved in the urban design process to understand the complexities and trade‐offs about incorporating sustainability into urban design projects. This paper begins by discussing our current understanding about the urban design process. Research conducted as part of the VivaCity2020 project is presented next, highlighting case studies from three major UK cities and what has been learned from understanding urban design processes in practice. The sets of processes are then compared, illustrating that decision makers, the tools and sustainability are not often consistently considered. To this end, a revised urban design process is shown together with a suite of tools, all of which decision makers can utilize and follow to create more sustainable urban design projects.