Hanoi faces significant challenges, including traffic congestion, air pollution, and climate change. In this context, planning and developing pedestrian zones is seen as a viable solution to reduce greenhouse gas emissions and save energy while enhancing urban environmental quality. Nevertheless, even within pedestrian areas, both direct and indirect emission sources exist due to ancillary activities. This paper proposes a series of urban design solutions for pedestrian areas in Hanoi to optimize energy efficiency and reduce greenhouse gas emissions while meeting the functional and aesthetic requirements of a modern urban space.