This course explores the concept of energy efficiency and sustainability in building design, covering topics such as forms of energy, strategies for energy efficiency, and the role of renewable energy and water management. The module emphasizes the importance of certified fixtures and rainwater harvesting for water efficiency. It also discusses waste management, including types of waste, treatment methods, and strategies for different building purposes. The focus then shifts to the environmental footprint of buildings, specifically addressing construction and demolition (C&D) waste. The module on C&D waste management explores sustainable practices, including composition, measurement, processing techniques, and regulations. It advocates for a circular economy approach to enhance resource efficiency and minimize environmental impact, concluding with case studies showcasing sustainable C&D waste management within the construction industry.