The LEED® certification program (Leadership in Energy and Environmental Design) was developed in 1998 by the U.S. Green Building Council (USGBC), in the United States.
The LEED® system is composed of a set of prerequisites and credits spread over 8 categories. It’s an international certification system based on the assessment and approval of a series of factors related to Green Building and alternative energies.
Each building is classified by its use and aspires to one of the 4 certification levels, depending on the amount of points the project accrues or on the level of compliance achieved.