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NABERS Sustainable Portfolios Report
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 February 2019 we invited all portfolios who have rated with NABERS to participate in the report. We received requests from 14 individual companies to obtain a portfolio rating. 13 individual companies have made their results public in the report.
Why does the NABERS Sustainable Portfolios Report use ratings from two different dates?
The report is based on certified ratings current at the end of calendar 2018 (CY18) or the end of financial year (FY19). All portfolio ratings are valid for 12 months.
How often will the report be produced?
The report will be produced every 6 months. The next one will be released in April 2020 for ratings current at 31st December 2019.
How can my company take part in the next report?
Email Nichola.Nicholson [at] environment.nsw.gov.au (subject: Portfolio%20Rating) (Nichola Nicholson) for more information.
Where can I find more information?
See the Portfolio Ruling for full details on the methodology behind each calculation.