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Green Star FAQs

FAQ F-00356
Can projects target Exceptional Performance under the Upfront Carbon Emissions credit without an LCA?

Yes, projects can target Exceptional Performance under the Upfront Carbon Emissions credit by using the GBCA's Upfront Carbon Emissions calculator in lieu of following the methodology of the Life Cycle Impacts credit which requires the completion of a Life Cycle Assessment (LCA) for modules A1 to A5 on the following conditions:

  • The project demonstrates that at least 60% of the proposed building is made up of reused building elements.
  • A narrative is provided that outlines the project's sources of module A4 and A5 emissions and how it aligns with or improves on standard practice.


This approach is allowed on the basis of that large proportions of building reuse is recognised as an effective strategy to reduce upfront carbon.

Rating Tools

This FAQ is related to the following Rating Tools, Categories or Credits:

  • Green Star Buildings v1 / Positive / 21 Upfront Carbon Emissions


These FAQs are:

  • provided as additional technical assistance for Green Star users.
  • optional and free to use on Green Star projects.

When used on Green Star projects, make sure to:
  • state the FAQ number on the Submission Template.
  • click on "Download" to save the FAQ.
  • include the PDF in the submission.

The GBCA reserves the right to add or remove FAQ at our discretion.

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