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Trajectory for Low Energy Buildings

The former Council of Australian Governments Energy Council (COAG Energy Council) developed and endorsed the Trajectory for Low Energy Buildings (Trajectory) and the Addendum to the Trajectory for Low Energy Buildings—Existing Buildings (Trajectory Addendum). This is a national plan that aims to achieve zero energy and carbon-ready commercial and residential buildings in Australia. It's a key initiative to address Australia’s 40% energy productivity improvement target by 2030 under the National Energy Productivity Plan. 

  • In February 2019, the Trajectory for new buildings was agreed.
  • In November 2019, the Trajectory Addendum for existing buildings was agreed.

The Trajectory and the Trajectory Addendum were developed in close consultation with stakeholders to outline policies that deliver cost effective energy efficiency improvements to homes and businesses. The aim of the policies are to lower energy bills, contribute to energy security and affordability, and reduce carbon emissions. It will also improve people’s comfort and health, save energy, reduce wastage for the wider economy, and assist in lowering peak demand.

Consultation for the Trajectory work for both Residential and Commercial buildings began in December 2017 with the inaugural stakeholder reference group (SRG) workshop. The SRG has continued to provide valuable input to the process and has grown to over 600 members representing energy consumers, the energy-efficiency sector, the building and property sector, the appliance and technology sector, the energy supply sector, gas suppliers, environmental organisations, energy consultants, universities, the Australian Government and state and territory governments.

Trajectory for Low Energy Existing Commercial Buildings

The Australian Government commissioned Ernst & Young (EY) with contributions from Strategy Policy Research and ClimateWorks Australia to consider a range of policy options and held extensive stakeholder engagement in 2019. 

The report sets out practical options that informed the COAG Energy Council’s plan for achieving its zero energy and carbon objectives.

Final Report - Achieving Low Energy Existing Commercial Buildings in Australia - EY

Trajectory for Low Energy Existing Homes

COAG Energy Council officials, with extensive input from the SRG, developed a report that identified a suite of potential policies to improve the energy efficiency of existing homes. These opportunities included improved energy efficiency at various stages of an existing home’s life, such as when it is being bought, sold, leased or renovated.

The report sets out practical options that informed the Trajectory Addendum for achieving zero energy (and carbon) ready existing homes.

Report for Achieving Low Energy Existing Homes

Residential Buildings – Energy Ratings and Tools

To progress the Trajectory commitment to deliver a home energy rating framework for existing homes, which leverages the Nationwide House Energy Rating Scheme (NatHERS), a Scoping Report has been developed.

This report found the option to extend NatHERS to existing homes, while continuing to test and learn from the Victorian Residential Efficiency Scorecard, is the most efficient and effective use of resources. A transition to an open market will follow, where other energy rating tools for existing homes can seek NatHERS accreditation. This approach ensures an early delivery of ratings and tools to support market-driven initiatives that encourage improved energy efficiency in existing homes, while also not locking in a single approach.

Scoping Report: Extension of NatHERS to existing homes

More information

Council of Australian Governments Energy Council COAG Energy Council

Trajectory for Low Energy Buildings COAG Energy Council

Addendum to the Trajectory for Low Energy Buildings—Existing Buildings