South Asia stands at a critical juncture in its urbanisation journey, facing challenges that necessitate innovative solutions backed by substantial investments. This paper addresses the issues of rapid population growth and environmental impacts, arguing for a holistic approach combining effective policies, sustainable practices, and international cooperation. Drawing on evidence from Pakistan’s cities, the study examines how urban planning frameworks can be redesigned to balance economic growth with environmental sustainability and social equity. The paper identifies lessons from Pakistani urban experience relevant to the broader South Asian context, with implications for development policy and planning reform across the region.