The NABERS Sustainable Portfolios Index (SPI) 2026 has launched, highlighting the continued expansion of the commercial property sector and reflecting its commitment to environmental transparency and full-scale sustainability reporting.
The 2026 Index tracks the energy, water, waste, and indoor environment performance of 67 portfolios across 31 companies, representing an expansion in market coverage.
In the office sector alone, the index now rates 402 assets spanning 8.2 million square metres, capturing roughly 26 per cent of the national office market.
The 2026 results demonstrate strong momentum across all sectors, with broader participation and deeper coverage of Australia’s commercial property market.
This year’s results saw several back-to-back winners and tight finishes at the top of the leaderboards.
In the coveted Office Energy Index, three portfolios shared the top spot with a 5.6-star rating: Charter Hall (Office Trust No. 3), Walker Corporation (Parramatta Square), and Quality Green Group.
Charter Hall also recorded the highest portfolio coverage in the index, assessing more than 1.5 million square metres of space.
Competition was equally fierce across other environmental metrics.
Four portfolios clinched a perfect 6 stars for Indoor Environment Quality, including Brookfield Property Partners and Walker Corporation’s Parramatta Square and Collins Square assets.
Meanwhile, Lendlease’s Barangaroo International Towers led the Office Water Index with 5.4 stars, and Cbus Property tied with Rest Direct Property Holding Trust to lead the Waste Index at 5.1 stars.
A major trend highlighted in the 2026 data is the shift toward full participation, with nine major property companies now reporting across all four environmental categories.
The SPI has also expanded its footprint into hospitality, with the Hotels Index doubling its reach to track 9,600 rooms, boosted by the debut of the Pro-Invest Group alongside CapitaLand and the Schwartz Family Co.
“These results point to a sector increasingly committed to continual improvement and reinforcing a core NABERS principle: measurement drives better management,” said Magali Wardle, NABERS Acting Director.
“A high NABERS rating is not only evidence of sustainability. It is a pathway to finance, a signal to investors, a point of engagement with tenants, and increasingly, a requirement for market participation.”