Cost and Benefit Analysis of LEED Building Projects As environmental problems become more and more serious in recent years, especially the intense negative impact that buildings in modern cities bring to cities, The concept of Green Building is considered increasingly important by local and federal governments. According to the US Green Building Council (USGBC), a green building is a building that uses design and construction practices that significantly reduce or eliminate the negative impact of buildings on the environment and building occupants. In addition to increasingly advanced building structure and technology, the main goal of green building is to protect the health of occupants, save energy and reduce environmental pollution. There are many green building certifications to judge whether the building meets green building standards and what level of environmental performance this building is at, to help government regulators, building professionals and consumers better see how this building can be improved and what is its impact on humans and the environment. Such green building programs include Leadership in Energy and Environmental Design (LEED), the Environmental Protection Agency's Energy Star program, National Association of Home Builders (NAHB Green), etc. Among them, LEED is one of the most popular certification programs that give the building credits for its environmental performance. In this essay I will discuss the costs and benefits of different types of LEED certified building projects. “LEED, or Leadership in Energy & Environmental Design, is transforming the way we think about how our buildings and communities are designed, built. , maintained and......halfway through paper......and LEED certification, the building costs can actually be offset by the benefits, thanks to the large energy savings and positive externalities. The concept of Green Building cannot be limited to individual cases. For the well-being of the whole society, the concept of Green Building should be extended to the concept of Green City, just as the mayor of Chicago claims, the “green city” is the future of modern cities, to achieve the goal of green". ”, we need to start with green buildings. To encourage more and more residents to support green buildings, purchase green buildings and apply environmentally friendly habits in their daily lives, existing green construction projects have the responsibility to express their "green" to more people, and also the Green construction like LEED must do more in carrying forward the idea of ​​Green Building.