Tool Ratings Categories Key features Comments name available NABERS 0 to 6 Stars in Water Categories are half star Waste rated separately increments Indoor Environment and independently, NABERS measures the delivering a actual performance of separate Energy Rating type Applicable to Data required buildings based on the NABERS rating twelve month worth of for each Tenancy: Tenant occupying Energy consumption building operation data. category covers the a leased or Net lettable area A rating expires after tenanted space privately owned Number of occupants twelve months of its office space within Hours of occupancy release. Therefore, a commercial when negotiating and Submetering is required for office building drafting a green lease, tenancy or base building attention needs to be Base Building: Building owner or ratings. If there is made to ensure that inadequate submetering, a covers central property manager regular NABERS whole building rating should building in relation to assessments are services common areas be performed. specified to monitor and verify the building’s Whole Building owner or energy efficiency Building: property manager performance. covers a combination of the above Green 4 Star, 5 Star Rating type The holistic Green Star ratings are Management and 6 Star assessment given upon design or Star Indoor Environment Quality Green Star Design: evaluates the environmental framework after construction. No Energy potential of the design of commercial addresses all action is required to Transport There are no offices (base buildings), for both new categories to maintain the rating and Water half star green and refurbished projects. deliver a single the rating does not Materials star ratings Green Star rating expire. Therefore, if Land Use & Ecology A rating expires two years after “design” Green Star is referred to Emissions a practical completion; for a building’s in a green lease, Innovation building to maintain a Green Star rating, attention needs to be an rating is required. “as-built” made to ensure the As-built: assesses the delivery of the green credentials of the same design criteria, but at construction building are maintained completion. throughout the lease term at the same level as required for the initial
Tool name Ratings available Categories Key features Comments NABERS 0 to 6 Stars in half star increments Water Waste Indoor Environment Categories are rated separately and independently, delivering a separate NABERS rating for each category NABERS measures the actual performance of buildings based on the twelve month worth of building operation data. A rating expires after twelve months of its release. Therefore, when negotiating and drafting a green lease, attention needs to be made to ensure that regular NABERS assessments are specified to monitor and verify the building’s energy efficiency performance. Energy Rating type Tenancy: covers the tenanted space Applicable to Tenant occupying a leased or privately owned office space within a commercial office building Data required Energy consumption Net lettable area Number of occupants Hours of occupancy Submetering is required for tenancy or base building ratings. If there is inadequate submetering, a whole building rating should be performed. Base Building: covers central building services Building owner or property manager in relation to common areas Whole Building: covers a combination of the above Building owner or property manager Green Star 4 Star, 5 Star and 6 Star Green Star There are no half star green star ratings Management Indoor Environment Quality Energy Transport Water Materials Land Use & Ecology Emissions Innovation Rating type Design: evaluates the environmental potential of the design of commercial offices (base buildings), for both new and refurbished projects. A “design” rating expires two years after a building’s practical completion; for a building to maintain a Green Star rating, an “as-built” rating is required. As-built: assesses the delivery of the same design criteria, but at construction completion. The holistic assessment framework addresses all categories to deliver a single Green Star rating Green Star ratings are given upon design or after construction. No action is required to maintain the rating and the rating does not expire. Therefore, if Green Star is referred to in a green lease, attention needs to be made to ensure the green credentials of the building are maintained throughout the lease term at the same level as required for the initial