Melbourne’s Metro Tunnel project has received the highest sustainability ratings available from both the Green Building Council of Australia and the Infrastructure Sustainability Council, recognising its environmental, social and economic performance across design, construction and operation.
The Metro Tunnel’s five new stations, Arden, Parkville, State Library, Town Hall and Anzac, have each achieved 6 Star Green Star As-Built certification from the Green Building Council of Australia, the organisation’s highest rating.
The project has also received leading As-Built ratings under the Infrastructure Sustainability Council’s IS Rating Scheme, recognising sustainability outcomes delivered during construction.
Key initiatives contributing to the ratings include avoiding more than 230,000 tonnes of carbon emissions, reducing cement-related emissions by 52 per cent, installing solar panels at Arden Station, incorporating regenerative braking technology in lifts and escalators, and reducing energy consumption across construction and operation by 44 per cent.
The project also includes rainwater and stormwater harvesting systems at each station, delivering a 55 per cent reduction in drinking water demand, as well as more than 16,500 square metres of new public space.
Social and community outcomes recognised through the ratings include First Nations-led artwork, public art installations, apprenticeship and trainee opportunities, and support for social enterprises.
The Green Star framework assesses sustainability performance across areas including energy, water, materials, transport, ecology, emissions and innovation, while the IS Rating Scheme evaluates economic, environmental and social outcomes across the full infrastructure lifecycle.
The Metro Tunnel, which opened to passengers in November 2025, is the largest upgrade to Melbourne’s rail network in more than four decades.
