NET4Age-Friendly aims to create an interdisciplinary global network fostering awareness and implementing smart, healthy environments. It addresses gaps in age-friendly concepts, emphasizing user-centric design, health pathways, digital solutions, and policy development. Through local ecosystems in European COST countries, involving citizens, authorities, businesses, and research, the project seeks to bridge fragmentation. Thematic Working Groups focus on design, health pathways, digital solutions, and policies. The network serves as a connector, hosting sessions and promoting knowledge sharing among researchers, emphasizing inclusiveness and engagement of early-career investigators and entrepreneurs.