This report provides a comprehensive overview of sustainable energy in building environmental design. It begins by defining sustainable architecture and its goals, emphasizing the minimization of environmental impact through efficient resource use and ecological design. The report explores the integration of sustainable energy sources, including solar and wind power, and discusses strategies for improving the efficiency of heating, cooling, and ventilation systems. It details the advantages of sustainable energy, such as reduced emissions, lower maintenance costs, and improved public health, while also addressing the disadvantages, including the non-reliability of renewable resources, potential insufficient energy generation, and high initial installation costs. The report references key literature to support its findings, offering valuable insights into the practical applications and implications of sustainable energy in the built environment.