The Australian regions outperforming the capitals for energy efficient housing

New Australian homes are far more energy efficient than those built previously, a new report from CoreLogic has shown. The report, Amped Up: How energy efficient are Australian

Homes?’ has taken data from CoreLogic and checked it against metrics generated by the  CSIRO’s RapidRate™ product to reveal that houses built after 2010 achieved a media star rating of 5.9 out of a possible 10. This compares with a median rating of 2.8 stars for homes built prior to 2010.

The most energy efficient region overall was the ACT, with a median star rating of 6.1. Within the ACT, the region of Molonglo had the highest rating. Positioned halfway between Yarralumla and Stromlo Observatory, Molonglo is the newest district in the ACT and is still under development. It is the only region nationally with a star rating of 6 or above for all dwellings.

The ACT dominated the top 30 list of most energy efficient suburbs. In contrast, Sydney and Hobart were notably absent from the top 30 list, although the report noted that there was a high level of variation across both cities. Sydney and Hobart are also the oldest cities in the country, with some housing stock dating back to the early 19th century. The report noted that demand for heating was also strongest in Hobart, which also had the lowest dwelling completion to population ratio. Heritage restrictions were also identified as a factor.

At a micro level, the Sydney suburbs of Blacktown-North and Bringelly-Green Valley recorded the highest ratings for NSW, with a median of 5.2 stars. In Victoria, the Surf Coast-Bellarine peninsula performed well, with the suburbs of Armstrong Creek, Curlewis and Mount Duneed all showing a median rating of 6 stars or higher.

Given Australian housing accounts for 24 percent of electricity use and 10 percent of carbon emissions, CoreLogic’s Head of Banking & Finance Solutions Tom Coad said it was vital that standards set in the National Construction Code were adhered to.

“The significant difference in energy efficiency between relatively modern homes and older homes can largely be attributed to changes in the National Construction Code

which has progressively placed more emphasis on energy efficiency requirements for newly built homes,” Mr Coad said.

“The Coalition’s recent push to pause the National Construction Code for 10 years flies in the face of Australia’s commitments to reduce carbon emissions.”

“Policymakers should be incentivising the construction of energy efficient buildings, not slamming the breaks.”

The report was compiled using the Nationwide House Energy Rating Scheme (NatHERS) star rating system. Research director at CoreLogic, Tim Lawless, said it was important to continue to monitor the energy efficiency of housing construction.

“What gets measured gets done,” he said. “As standards for energy efficient design and construction rise, it’s also becoming more important to measure energy resilience in

our housing stock.

“Minimum energy efficiency standards for new builds will continue to be important in supporting Australia’s greenhouse gas reduction targets, but there is likely to be

increasing focus and incentives on established housing where most of Australia’s housing stock was built prior to recent minimum standards.”