On April 27, 2009, USGBC launched LEED Version 3.0. This constant updat-
ing of requirements for certification allows LEED to take advantage of new
technologies and advancements in building science. In addition, it allows the
USGBC to make adjustments to the certification, such as incorporating
regional differences in sustainability and emphasizing operational performance
rather than design intent.
Various LEED rating systems have been developed for different building
types, sectors and project scopes. Included are LEED for Core and Shell,
LEED for New Construction, LEED for Schools, LEED for Neighborhood
Development, LEED for Retail, LEED for Healthcare, LEED for Homes,
and LEED for Commercial Interiors. The Green Building Certification
Institute (GBCI), established in 2008 by the USGBC as a separate entity,
administers the certification programs related to green building practice such
as LEED. The GBCI ensures that LEED buildings are constructed and oper-
ated as intended and its independence ensures that the results are unbiased.
LEED is credit-based, giving points for certain eco-friendly measures that
are taken during the construction and use of a building. LEED is not rigidly
structured and not every project must meet identical requirements to qualify.
LEED is largely based on the following: energy savings, water efficiency,
CO 2 emissions reduction, improved indoor environmental quality, improved
building materials, use of resources and design innovation.
Credits in the LEED 2009 for New Construction and Major Renovations
address seven topics:
n Sustainable sites (SS)
n Water efficiency (WE)
n Energy and atmosphere (EA)
n Materials and resources (MR)
n Indoor environmental quality (IEQ)
n Innovation in design (ID)
n Regional priority (RP)In addition, there are eight prerequisites that each building must meet prior to
any rating:
n Construction activity pollution prevention
n Water use reduction
n Fundamental commissioning of building energy systemsEnergy and Sustainability 191