ABSTRACT
The built environment has a significant role to play in the sustainability agenda. The
Organization for Economic Co-operation and Development (OECD), in its analysis
of energy consumption of OECD countries (2005), found that buildings and infra-
structure represented from 40 to 50% of gross capital formation for each of the
countries, and between 25 and 40% of final energy consumption. A survey by
Gensler (2008) repor ted that 73% of prope rty developers believe that spiralling
energy costs will make energy consumption a significant factor in building selection
and drive the development of more energy-efficient buildings.