Our industry ratings and memberships

Environmental ratings are important industry tools that provide a snapshot of our impact and improvements over time. ISPT use a number of rating systems to measure and track our sustainability performance and hold ourselves accountable to sustainable improvement across our portfolio and operations.

All the ratings systems we use, and industry memberships we hold, are an important part of making sure our achievements aren’t in isolation. Being a part of these industry bodies ensures ISPT and our peers are influencing one another, innovating together and ultimately creating a better future.


The Global Real Estate Sustainability Benchmark (GRESB) assesses the ESG performance of real assets and covers more than 1,000 property companies, real estate investment trusts, funds and developers globally. Working with the industry, GRESB defines the global standard for sustainability performance in real assets and provides standardised and validated ESG data to the capital markets. ISPT has been participating in GRESB since 2011. For us, GRESB provides an independent, third party benchmark of our ESG performance, against global and local standards. We use these results to start a discussion with Investors around their expectations for our ESG programs and performance and set an ESG performance improvement pathway.  Read about our latest GRESB ratings



The National Australian Built Environment Rating System (NABERS) is a simple, reliable and comparable sustainability measurement for hotels, shopping centres, offices and more. A NABERS rating helps us accurately measure, understand and communicate the environmental performance of our buildings, while identifying areas for cost savings and future improvements. There are three types of NABERS ratings:

  1. NABERS Energy: Measures the energy efficiency of a buiding.
  2. NABERS Water: Measures the amount of water used and recycled within a building.
  3. NABERS Indoor Environment: Measures the indoor air quality, lighting quality, temperature and thermal comfort as well as acoustic quality of a building.

ISPT started rating our portfolio in 2012, and we now have some of the most healthy, energy and water efficient buildings in the country. We’ve quantified over $27M in utility savings as a result of energy efficiency improvements using NABERS as a performance benchmark.



Launched by the Green Building Council of Australia in 2003, Green Star is Australia’s only national and voluntary rating system for buildings and communities. Green Star is helping to improve environmental efficiencies in our buildings, while boosting productivity, creating jobs and improving the health and well-being of our communities.ISPT use Green Star to provide third-party design, construction and performance verification. We have over 70 retail and commercial buildings rated in Green Star Performance to benchmark their current environmental performance and allow us to prepare tailored building roadmaps to improve performance and reduce outgoings.We acquired our first 6-Star Green Star office building in 2006. That number will continue to grow as part of our commitment to ESG excellence.



ISPT’s membership with the Green Building Council of Australia (GBCA) represents our commitment to sustainability in the built environment and beyond.As 15+ year members, we recognise and support the vision to create healthy, resilient and positive places. We support the sustainable transformation of Australia’s built environment through this membership and in alignment with our ESG strategy. We know that improving the quality of our built environment will play a crucial role in meeting global climate change targets.



The United Nations Sustainable Development Goals (SDGs) are the global blueprint for ending extreme poverty, fighting inequality and injustice and protecting our planet. They consist of 17 interconnected goals to achieve by 2030.ISPT shares the ambitions of the SDGs and welcomes the opportunity to contribute to the goals. We’ll do this by managing and mitigating our negative impacts, identifying and expanding our positive impacts, and driving long term value for our people, investors, customers and communities.We’ve aligned our ESG Strategy and Framework to the SDG Goals, focussing on 10 priority goals where we know we can make a genuine and considerable impact