Shifting demographics, along with changing family structures and household dynamics worldwide, make it increasingly important to reflect on successful practices that provide opportunities for interaction, engagement, and support across more than two generations. This chapter, therefore, explores three key areas of research: (1) elder-friendly communities, (2) child-friendly communities, and (3) healthy communities, to identify how they align and intersect to form foundations for intergenerational approaches. Instead of a limited view that focuses on the amelioration of age-specific problems, research prioritizes shared principles that promote the development of intergenerational community assets. In addition, there is encouraging evidence suggesting the allocation of policy resources-financial, physical, humanis not necessarily a zero-sum game because intergenerational approaches can produce synergistic outcomes. The chapter concludes with recommendations for additional research. Keywords A Neighborhood for All Ages • Age-friendly employment policies • Baby boom • Built environment domains • Buildings • Housing • Outdoor spaces • Built environment domain transportation • Child-friendly city • Building blocks for framework • Definition • Initiative • Co-facilitation methods • Cohousing • Communities for All Ages • Convention on the Rights of Older Persons (CROP) • Cyber Seniors • Elder-friendly communities • Garden Mosaics • Golden Link model • Healthy communities • Home help services • Hope Meadows • Imagining Livability Design Collection • Implementation gap • Intergenerational communities • Aims • Challenges and opportunities • Community benefits • Individual physical benefits • Physical and social barrier reduction • Positive attitudes • Social and built environment • Built environment domains; social domains • Intergenerational community initiatives and policies • International migration • Life-course approach • Lifespan approach • Making Connections • Multigenerational bonds • National Center on Grandfamilies • Naturally occurring retirement communities (NORCs) • Normative gap • ONEgeneration • Pedestrian safety • Proactive neighborhood planning • Rights-based approaches • Salutogenesis • Shared housing • Social domains • Communication and information • Community support and health services • Employment and civic participation • Social inclusion • Social inclusion • The Marvin • Twin Creeks • Youth bulge • Zoning regulations