Urban areas face challenges in providing safe, accessible public spaces for pedestrians. Bangkok, a densely populated city, is addressing this issue through the development of elevated walkways. The Green Mile Walkway, a crucial pedestrian infrastructure, currently faces limitations, such as inadequate facilities, poor maintenance, and a lack of green spaces. This project aims to redesign the Green Mile Walkway using a sustainable urban design approach that meets the needs of all stakeholders. Double Diamond design framework was employed to empathize with stakeholders, define the challenge statement, ideate potential solutions, prototype designs, and test them with feedback. Site analysis, interviews with stakeholders, collaboration with local businesses, and secondary research on sustainable urban design principles and successful skywalk designs informed the project's design process. The challenge statement was formulated to create a pedestrian infrastructure that connects various areas, promotes local sustainable businesses, and fosters pro-environmental practices while providing a comfortable, safe, and inclusive space. The skywalk design prioritized connection, function, green spaces, adequate space, and enjoyment. Connection ensured linkage between commercial and residential areas and public transportation hubs. Function addressed the needs of pedestrians, local businesses, and government agencies, while green spaces enhanced aesthetics and environmental sustainability. Adequate space ensured comfortable walking without overcrowding, and enjoyment was emphasized through amenities and educational signage. The redesigned Green Mile Walkway addressed existing limitations and incorporated sustainable urban design principles, meeting the needs of all stakeholders. This project showcases the potential for revitalizing urban spaces using a human-centred approach, promoting sustainable urban development, and fostering environmentally responsible practices. Future research could explore scalability and adaptability to different urban contexts.