This report explores the barriers and opportunities to the development and expansion of intergenerational shared sites, focusing on the experience of sites in the United States. It builds on an earlier report 'All In Together', which identified the positive benefits that intergenerational shared sites could have for older people, young people and children. Interviews with staff and board members at intergenerational shared sites, national policy and program experts identified four key phases in the development and operation of shared sites. These are: Creating the vision, which included nurturing champions and building partnerships; Making it work, from finding resources to designing the space to navigating regulations; Building intergenerational relationships; and Maintaining momentum. The report discusses each of these phases and strategies to address them, drawing on practice from the shared sites. It is hoped that by developing a better understanding of these pivotal phases, organisations and communities will be able to make further progress and further develop intergenerational shared sites.