Under Nationwide House Energy Rating Scheme (NatHERS), all new houses and major renovations can use the Star rating approach. NatHERS energy rating is a way to demonstrate compliance with the energy efficiency requirements of the NCC.
Under NCC 2019, a 6 Star energy rating is a minimum to achieve compliance with the code.
From May 2023, 7-Star rating will be the minimum requirement for dwellings in Victoria.