This guide presents the Urban Futures Method to test the likely future performance of urban development and regeneration-related ‘sustainability solutions’ – actions taken today in the name of sustainability – in a series of possible future scenarios in the year 2050. If a proposed solution delivers a positive legacy, regardless of the future against which it is tested, then it can be adopted with confidence. The Method provides insights into the potential impacts of today’s urban planning and design decisions, and challenges the conventional mainstream approach to sustainability by incorporating changing priorities and different ways of thinking into today’s actions, with the intention to ensure relevance in the future. This publication is the planned outcome of a four-year, three point one million pound grant from the UK Engineering and Physical Sciences Research Council on Urban Futures. It has been directed by a steering committee and expert panellists representing industry, government, academia and the third sector. Essential reading for decision-makers in the public and private sectors, community stakeholders, urban designers, planners, developers, architects and engineers involved in urban development and regeneration.