Sustainable urban development is a critical global concern, which becomes even more challenging in hilly regions due to their unique geographic and environmental characteristics. This chapter delves into the concepts, historical evolution, and key challenges associated with sustainable urban development, with the focus on hilly regions. It explores the challenges and opportunities these landscapes present and provides guidance on achieving sustainability goals in such regions. Geographically, these regions pose unique constraints, such as steep slopes and limited space, necessitating novel approaches. Environmental considerations are of utmost importance when preserving biodiversity and mitigating the risks of soil erosion and landslides. Socially, marginalized communities often have limited access to essential services and economic opportunities, necessitating special consideration to achieve equity. To address these challenges head-on, we explore strategies tailored for sustainable urban development in hilly terrain. Territorial planning and land use policies, along with the implementation of sustainable transportation systems, green infrastructure, and community engagement, play a crucial role in the conversation of these landscapes into thriving, resilient, and environmentally conscious urban areas. In conclusion, as urbanization continues to reshape the world, the importance of sustainable urban development cannot be overstated. In hilly regions, where the complexities of geography and environment converge, crafting sustainable urban environments require innovative approaches. By understanding the principles, historical evolution, and specific challenges associated with sustainable urban development in hilly regions, we aim to chart a path toward urban landscapes that are not only ecologically sound but also socially inclusive and economically vibrant. These efforts contribute to the well-being of local inhabitants and the broader global sustainability goals.