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Environmental Sustainability

Sustainability is in our DNA. For thousands of years, the Gadigal people would come to Bennelong Point to meet, share stories and music. Their land management ensured the preservation of their food sources. The Opera House’s architect, Jørn Utzon, incorporated sustainable design elements such as a seawater-cooling system into the building which opened in 1973. The Environmental Sustainability Plan 2017 – 2019 builds on that legacy. 

As a source of inspiration, the Opera House aims to be a leader in environmental and social sustainability.

Achievement of GBCA 5 Star Green Star rating

The Opera House has been awarded a 5 star Green Star performance rating from the Green Building Council of Australia (GBCA), becoming one of the first World Heritage-listed buildings globally to achieve the certification. A number of successes including the Opera House’s recent Carbon Neutral certification, implementation of a new waste management program, efficiencies in water use and a more than 9% reduction in energy use have enabled the Opera House to achieve the certification.


The Concert Hall lit green. Photo: Tim da Rin.


A high complexity reef pod. Photo: Alex Goad.

Artificial reef installed on Bennelong Point

After first announcing the project in 2017, a series of modular artificial reefs have now been installed alongside the Opera House sea wall. The pioneering project, led by UTS Professor of Marine Ecology David Booth and funded through a NSW Government Environmental Trust Restoration & Rehabilitation grant, aims to explore new ways to increase marine biodiversity and support native species in Sydney Harbour.

The newly installed artificial reef is made up of eight pods containing three hexagonal-shaped units placed underwater around Bennelong Point. Created by Reef Design Lab, the pods are constructed from marine-grade steel and concrete and feature elements of 3D printed design. 

The structures will become encrusted with seaweed and sea life, providing a home for smaller fish species.

This project has been assisted by the New South Wales Government through its Environmental Trust.

Opera House Artificial Reef Project

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Renewable Power Purchase Agreement (PPA) signed

The Opera House has signed an industry-leading Power Purchase Agreement (PPA) with energy retailer Flow Power to invest its annual $2.4 million electricity spend in sourcing power from renewable power projects – a total investment of more than $16 million. Under the industry-leading agreement, more than 85% of the Opera House’s yearly energy consumption of 16 gigawatt hours (equivalent to 2,500 households) will be matched with available  supply from NSW wind and solar projects including Sapphire Wind Farm in Glenn Innes and the Bomen Solar Farm under construction in Wagga Wagga.


A New South Wales Wind Farm.

Greening when Cleaning the House

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