The submission system of building environment plan is designed to clarify environment-friendly approaches to buildings and highly evaluate excellent approaches. The system was introduced in June 2002 with the aim of creating a market where environment-friendly and high-quality buildings are highly evaluated.
It is required for those buildings that will be newly built or extended and whose total floor area exceeds 5,000 square meters to submit their building environment plans. Moreover, those buildings that will be newly built or extended and whose total floor area exceeds 2,000 square meters may submit their building environment plans on a voluntary basis. Details of plans and the results of evaluation of environment-friendly approaches are opened to the public on the official website of the Tokyo Metropolitan Government (TMG).
The submission system of building environment plan has four evaluation points, i.e., "streamlining of energy use," "appropriate utilization of resources," "protection of natural environment" and "mitigation of heat island phenomenon" (details are shown in the table below). Moreover, it was made mandatory in January 2010 to consider the introduction of equipment to use renewable energies. From now on, renewable energies such as sunlight, solar heat and others are expected to come into wider use in large-scale newly-built buildings, only a few of which have introduced renewable energy to date.