Codes Red: Questions and Comments From the Audience with some Responses

Key Takeaways

• Green Star now accepts PEFC and Responsible Wood timber certifications.
• PVC credit shifted from avoidance to higher‑quality, low‑impact PVC.
• Calls for NCC Section K to address renovation embodied carbon.
• Industry urges open‑source material data like UK’s BREEAM.
• Holistic carbon accounting includes refrigerants and equipment energy use.

Pulse Analysis

The GBCA’s latest disclosures show Green Star moving beyond energy‑use metrics to a more nuanced material assessment. By expanding timber eligibility to PEFC and Responsible Wood and revising the PVC credit to reward higher‑performance products, the rating system aligns with global sustainability trends and reduces the risk of illegal or low‑impact material use. This shift is reinforced by the Responsible Products Framework, which grades materials on lifecycle impacts, offering developers clearer pathways to earn points while meeting stricter environmental expectations.

A recurring theme in the Q&A was the omission of embodied carbon from the current regulatory landscape. Stakeholders urged the National Construction Code to create a dedicated Section K for renovations, arguing that retrofits of heritage and existing buildings represent a significant carbon‑saving opportunity. Without accounting for embodied emissions from structural upgrades, refrigerants, and even on‑site equipment, projects may inadvertently breach compliance while missing reduction targets. Integrating holistic carbon accounting into the code could enable more accurate trade‑offs between operational efficiency and material choices.

For the industry, these developments signal a push toward greater transparency and data accessibility. Comparisons to the UK’s open‑source BREEAM model underscore the demand for publicly available material certifications and lifecycle data. As Australian developers adopt the updated Green Star criteria, they will need to invest in verification processes and supply‑chain audits to substantiate claims. Aligning domestic standards with international best practices not only mitigates reputational risk but also positions Australia’s building sector to meet future climate‑policy mandates and investor expectations.