There are many information on the internet related to green building. Below are some links that we used for our projects. Hope they will be useful to you too.

Green Building Rating Tools

Other links

Green Building Councils - A rich source of information about green buildings in each country

Hong Kong Green Building Council

Malaysia Green Building Confederation

Singapore Green Building Council

US Green Building Council

Vietnam Green Building Council

Government Resources - Information related to energy efficiency from different government authorities

Electrical & Mechanical Service Department, Hong Kong

Building & Construction Authority, Singapore