Results Summary

The cumulative difference across the 6 categories assessed for Green Star compliance (global warming potential, ozone layer depletion, acidification, eutrophication, photochemical oxidant creation potential and abiotic resource depletion) shows a cumulative 189% reduction compared to the benchmark, achieving 6 points in the Life Cycle Assessment – LCA credit. A further 1 point is achieved for reporting on a further 5 impact indicators. Thus a full total of 7 points is achieved.

Impact Category Unit                   % Saved Against Benchmark
Global Warming Potential kg CO2e / m2

42 %

Abiotic Resource Depletion kg Sbe / m2

43 %

Eutrophication kg PO4e / m2

20 %

Ozone Layer Depletion mg CFC11 e/m2

43 %

Acidification Potential kg SO2- e/m2


Photochemical Oxidant Creation Potential kg C2H4 e/m2

22 %

Project features

It is observed through the LCA modeling that the following areas have the greatest impact to the overall environmental footprint of the building:

Operational Energy

The mechanical service systems for building heating and cooling include Passive Chilled Beam and ‘heat recovery’ technology. These systems are backed up by high-efficiency plant and equipment, including pumps and chillers which are specifically selected and configured to minimise energy wastage. Daylight and motion control sensors were used to make sure lighting energy was used only when required.

Life Span of Building

The project was assessed according to the Green Star Materials Life Cycle credit and has a proposed design life of 60 years. Although it is reasonable to assume there will be minimal re-development potential due to the high density and high demolition cost, a 60 year life-span has been chosen in accordance with the Green Star “innovation challenges” credit methodology.


Specification of materials with better performance included use of recycled timber, recycled steel and reductions of use of PVC.


This assessment was conducted by Richard.