Developed by the United States Green Building Council, LEED stands for Leadership in Energy and Environmental Design. It is a performance-based system designed for rating new and existing buildings according to their overall environmental impacts. It evaluates performance from a "whole building" perspective over a building's life cycle, and has rapidly become the national standard for providing a definitive measure for what constitutes a green building.

LEED comprehensively evaluates a buildings impact(s) through a series of carefully weighted assessments in the following areas:

  • Sustainable site selection & development
  • Energy demands & atmospheric emissions
  • Material & resource conservation
  • Interior environmental health

The United States Green Building Council is a coalition of leaders from across the building industry that works to promote buildings that are environmentally responsible, profitable, and healthy places to live and work.

LEED, and its overall approach formed the basis for the comprehensive reductions of negative environmental impacts achieved at Oak Glen.