All new homes in Victoria are required to meet a minimum 6 star energy rating. This greater range of energy efficiency and water saving features improve occupant comfort and reduce energy bills. This also includes extensions and renovations, and houses being relocated.

Building inspections don't go far enough.

How does a building inspector know if insulation has even been installed in your new home? 

Does the building site supervisor check energy rating report requirements have been met?  There are many many new homes out there where the answer to these questions is NO.