Urban development incorporating accessibility, inclusiveness, and sustainability has an important role to play in building equitable and resilient cities. This research explores how design of public open spaces can serve to advance social inclusion and environmental sustainability simultaneously within the context of fast-growing Indian towns. Based on a comprehensive literature review and practice analysis, the paper highlights the interconnectedness of universal design principles, inclusive planning, and green infrastructure. It focuses on how environments open to all benefit not only the disabled but also all other users, such as elderly people, children, and socially disadvantaged groups. A conceptual model has been proposed to demonstrate how inclusive design leads to participatory, flexible, eco-sensitive public spaces, when placed within ecological planning paradigms. The model connects inclusive design strategies with community wellbeing, social connectedness, and ecological resilience. This systematic approach promotes the design of urban spaces that are functionally efficient and socially equitable. The conclusions seek to inform planners, urban designers, and policymakers towards inclusive green infrastructure designs that support urban dwellers dignity, accessibility, and sustainability in the long term.