LEED prerequisites are the baseline requirements that must be in place for a building to be considered for LEED certification with the U.S. Green Building Council. Once a building's prerequisites have been complied with, a building may earn "core credits" which build towards incrementally higher levels of LEED certification. The levels "Certified", "Silver", "Gold" and "Platinum" are awarded, respectively, by earning 40%, 50%, 60% and 80% of the core credits available under LEED at the time of certification. Additional "innovation" credits for exceeding performance in the five areas evaluated by LEED.

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