Star rating impacts on rent

Next year apartments and units and town houses in Strata complexes will be required to advertise their NABERS star rating. Essentially the star rating will tell a prospective buyer or tenant how energy efficient their unit is likely to be. This will impact on the rent an owner can expect to receive and the price an owner will get when they sell. Imagine the impact when the market floods with units for sale that have no rating. How will those compete with 3 and 4 star rated buildings. It’s a scary thought.