UNLEASH Hack Sri Lanka addresses the urgent need for sustainable urban development as rapid urbanization and environmental degradation challenge the country’s growth. With increasing pressure on infrastructure, rising emissions, and unequal access to basic services, Sri Lanka must rethink how its cities are built and managed. This Hack brings together young changemakers to co-create solutions aligned with SDG 9, 11, and 13, promoting green innovation, inclusive urban planning, and climate-resilient infrastructure. By focusing on local contexts and community-driven ideas, participants will explore how cities can become engines of sustainability, ensuring a greener, safer, and more inclusive future for all Sri Lankans.