Australian homes are becoming increasingly energy efficient, with the average newly-constructed home having an energy rating of 6.2 stars, an improvement since the introduction of star ratings in 2001, when the average home was estimated at 1.8.
Data is chiefly sourced from the Nationwide House Energy Rating Scheme (NatHERS), a measurement and compliance system for energy efficiency administered by the Australian Government.
CSIRO Grids and Energy Efficiency Research Director Dr Stephen White said the data shows steady progress in residential sustainability efforts.
"In order to meet national challenges of sustainable energy and resilient cities, it's vital that we track progress. As an independent research agency driving innovation in energy, particularly residential energy rating, CSIRO is well placed to do this," Dr White said.
"Tracking these changes is an important step to ensure emissions goals are met, while seeing where more attention is needed across the industry."
Key findings drawn from the data (based on apartments and houses) includes:
195,000 new homes were built in Australia in the past year
There is steady progress in building of high-performance homes, especially in Tasmania and the ACT
Overall, Australian homes are increasing in size, with an average floor area of 132 m2 (this includes houses and apartments)
Average dwellings were most likely to have a metal roof, brick veneer walls, and a concrete floor