A Lean Building is a term used to describe a building that has been designed and constructed with the goal of minimizing its environmental impact. This is done by utilizing green building materials, energy-efficient systems, and sustainable practices. Lean Buildings are designed to reduce the amount of energy used, reduce water consumption, and create a healthier environment for occupants. They are also designed to be cost-effective and easy to maintain. Lean Buildings often use renewable energy sources such as solar and wind power, as well as energy-efficient appliances and lighting. Additionally, they are often constructed with recycled materials and are designed to minimize the amount of waste produced. Lean Buildings are becoming increasingly popular as people become more aware of the importance of sustainability and reducing their environmental impact.