This research investigates recent developments in assessment methods of green buildings
and compares the differences in rating systems among the United Kingdom, USA, and
Germany. There are indications that the rating systems are moving from green buildings
to sustainable buildings. In order to understand the recent research in academic areas,
we survey the recent Ph.D. dissertations and literature related to green building
assessment. Discussion is provided on the major research areas of green buildings,
which cover accountability of life cycle cost, methodology for balancing the three
pillars, and government vision and public policy.