This report specifically addresses the mainstreaming of urban nature-based solutions for economic regeneration. We understand economic regeneration to be about the improvement and reinvigoration of urban areas. Nature-based solutions have the potential to encourage economic regeneration through improving economic vitality and providing attractive places to live and work. To mainstream nature-based solutions and to fully utilise their potential to economic regeneration, this report draws on extensive empirical research in European cities and summarises four promising pathways.