Australia’s built environment reached new heights of sustainability in 2025, with over 4,700 projects certified under the Green Building Council of Australia’s (GBCA) Green Star program.
Leading the pack were 10 standout buildings achieving top 6-Star Green Star Performance v1.2 ratings, showcasing innovations in energy efficiency, water management, and carbon reduction.
These projects, drawn from the GBCA’s official directory, highlight a shift toward operational excellence amid rising mandates for greener investments.
Westpac Place at 275 Kent Street, Sydney, owned by Mirvac, earned certification in June 2025 with an impressive score of 91. This office tower excels in all-electric systems and high-performance facades, minimising emissions while prioritising occupant health.
Similarly, International Tower 1, 2, and 3 at 200 Barangaroo Avenue in Barangaroo, developed by Lendlease, secured a 6-Star rating in October 2025 with an average score of 86, featuring advanced HVAC optimisation and biodiversity integration.
Village Centre in Batemans Bay at 1 Perry Street, owned by Active Super, followed closely with a June 2025 certification scoring 85. Its community-focused design emphasises adaptive reuse and resilient infrastructure tailored for regional needs.
Brisbane’s 275 George Street, under Charter Hall, achieved 6 Stars in June 2025 with 84 points, standing out for its net-zero-ready framework and circular economy principles in material selection. Darling Quarter at 1/25 Harbour Street, Sydney, by Lendlease, matched this rating in October 2025 at 83, incorporating waterfront cooling and renewable microgrids.
Bankwest Place on William Street, Perth, and 1 Shelley Street in Sydney (both Charter Hall assets) tied at 82 points after June 2025 certifications. Bankwest leverages passive solar design suited to Western Australia’s climate, while Shelley Street prioritises indoor environmental quality with smart ventilation.
Sydney’s 200 George Street by Mirvac scored 82 in September 2025, balancing commercial viability with embodied carbon reductions through low-impact concrete. Charter Hall’s 333 George Street followed at 81 points in June, noted for its tenant-flexible green leasing models. Rounding out the list, Santos Place at 32 Turbot Street, Brisbane, hit 80 in June 2025, pioneering industrial-scale electrification in a commercial setting.
GBCA Chief Impact Officer Jorge Chapa emphasised the momentum, stating that sustainability is now embedded in the built environment’s DNA.
These certifications under Performance v1.2 evaluate real-world operations, not just design, pushing beyond traditional tools like Design & As Built.
For instance, projects like Melbourne Business Park’s 90 Melbourne Drive achieved 5 Stars under Buildings v1.0, signalling logistics sector uptake, though the top 10 dominated with perfect 6-Star operational benchmarks. Owners like Charter Hall and Lendlease appear repeatedly, underscoring institutional leadership — Charter Hall alone claimed five spots.
This cohort advances Australia’s net-zero goals, with features like rainwater harvesting (up to 92 per cent potable water savings seen in comparables) and solar offsets reducing grid reliance. As mandates evolve, 2025’s leaders provide blueprints for scalable green retrofits and new builds.
Chapa noted growing certification volumes, from aquatic centres to adaptive reuse communities, proving sustainability’s viability across scales.
With tools like Green Star Buildings v1.0 gaining traction for industrials and precincts, we can expect 2026 to build on this foundation.
Developers targeting world-leading 6 Stars, as in past icons like Pixel Building, have affirmed the program’s role in global benchmarks.
