The NABERS Sustainable Portfolios Index (SPI) showcases 43 leading property portfolios across Australia according to their NABERS ratings and percentage of portfolio rated. This year the Index covers office buildings, shopping centres and carbon neutral portfolios.
The 2021 index includes new features:
- Carbon Neutral portfolios Index page
- Expansion of Net Zero Commitments to include Commitments from World Green Building Council (WorldGBC) and Science Based Targets Initiative (SBTi).
Now in its third edition, the SPI is globally unique in that it provides a public, whole portfolio view of actual performance in terms of emissions, water usage, waste and indoor environment quality. It also tracks progress over time. Read more about this year's Index.
NABERS is proud to share these incredible sustainability results and showcase the achievements of these portfolios.
What’s the definition of a portfolio in this report?
A portfolio consists of two or more buildings with NABERS ratings owned by the same company. These buildings must have the same rating type (for example, Energy or Water) and be the same building type (for example, Offices or Shopping Centres).
How have the verified portfolio ratings been calculated?
To calculate Office Energy or Water results for portfolios, we considered the portfolio’s ownership share of each building, along with the star rating and size (NLA) of individual buildings. These factors were then used in the ‘weighted average’ calculation to ensure that individual buildings have an appropriate contribution to the final Portfolio Rating.
The percentage of an office portfolio rated is calculated using ‘Rated NLA’ for rated offices and ‘Total NLA’ for unrated assets.
To calculate Shopping Centre Energy or Water results for portfolios, we considered the portfolio’s ownership share of each centre, along with the star rating and size (GLAR) of individual centres. These factors were then used in the ‘weighted average’ calculation to ensure that individual centres have an appropriate contribution to the final Portfolio Rating.
The percentage of shopping centre portfolio rated is calculated using ‘Rated GLAR’ for rated assets and ‘Total GLAR’ for unrated assets.
Starting this year, shopping centres sized between 5000 - 15000 m2 are now considered rateable for the SPI, having previously been exempt. This may affect coverage for some portfolios.
What about portfolios with mixed asset types i.e. Offices and Shopping Centres?
In the report we’ve separated out Offices and Shopping Centre ratings – even if those ratings belong to the same portfolio. This is because these two sectors are inherently different and cannot be compared or grouped together.
Energy ratings for office buildings are mandatory for all premises with NLA > 1000m2. This has resulted in a much higher average star rating for office buildings than shopping centres where all ratings undertaken are still voluntary and not always completed on an annual basis.
Does the report include whole building ratings, base building ratings or both?
The report includes both. The majority of ratings in the report are base building ratings. However, Property NSW’s portfolio rating is the only portfolio comprised solely of whole building ratings.
Does the portfolio report include ALL companies with portfolio ratings?
No. In November 2020 we invited all portfolios who have rated with NABERS to participate in the report. 18 individual companies have made their results public in the report.
How often will the report be produced?
The report will be produced every year.
How can my company take part in the next report?
Email firstname.lastname@example.org for more information.
Where can I find more information?
See the Portfolio Rules for full details on the methodology behind each calculation.