In South Asia, the existence of approximately 250 million individuals in informal settlements indicates a pressing challenge posed by urbanization. While urban growth presents opportunities for economic revitalization and improved living standards, the region confronts formidable barriers to prosperity and enhanced quality of life. Achieving sustainable urban development necessitates forward-thinking public policies that prioritize environmental preservation, social equity, and economic advancement. A comparative analysis of implementation strategies underscores the significance of tailored approaches responsive to the distinct challenges and potentials of cities. By exchanging best practices, lessons learned, and innovative solutions, urban centers can advance sustainable development agendas and foster resilient, thriving communities for generations to come. This research investigates the hurdles faced by urban areas in achieving sustainability amidst rapid population expansion, environmental decline, and socio-economic disparities. Through comparative analysis of policy frameworks and implementation tactics across varied urban landscapes, the study assesses the efficacy of diverse interventions, identifies pivotal factors driving success, and offers insights into optimal practices for promoting urban sustainability.