The NABERS Sustainable Portfolios Index (SPI) showcases 64 leading property portfolios across Australia according to their NABERS ratings and percentage of portfolio rated. The Index covers office buildings, shopping centres and carbon neutral portfolios.
Now in its fifth 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 here.
Find out more, including how to join next year’s Index, below.
NABERS is proud to share these impressive sustainability results and showcase the achievements of these portfolios.
What is new this year?
We are now sharing the Total Portfolio Area for portfolios to allow for better comparison. This calculation considers the ownership of the building, therefore allowing for an accurate representation of the area.
Why is GreenPower not included in this year’s SPI?
NABERS Energy rating with GreenPower is being phased out from our tools as part of the introduction of the Renewable Energy Indicator (REI) in 2023, which will allow communicating the use of renewable energy in a clearer and more transparent way. GreenPower will be recognised as part of the REI.
As some companies have already started to transition from the use of GreenPower into other forms of renewable energy, such as non-GreenPower LGCs, it’s been decided not to include the Energy rating with GreenPower in this edition of the SPI. This will not affect in any way the portfolio rating result, or its ranking within the Index, given that we are only using the energy rating without GreenPower for the calculations.
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.
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 2022 we invited all portfolios who have rated with NABERS to participate in the report. 27 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.
Terms from the Index
- The Total Portfolio Area - consists of the total Net Lettable Area or NLA (for offices) or the Gross Lettable Area - GLAR (for shopping centres) of a building, multiplied by the percentage ownership of the building. The result is then aggregated at a portfolio level.
- NLA - Net Lettable Area (for Offices)
- GLAR - Gross Lettable Area Retail (For Shopping Centres)