NABERS Embodied Carbon Rating Offers New Pathway for Modular Construction

With embodied carbon now emerging as a critical focus in Australia’s building emissions landscape, NABERS has introduced its Embodied Carbon rating tool—offering new opportunities for prefab and modular construction projects to lead on verified sustainability performance.

Targeting Embodied Carbon from the Outset

The NABERS Embodied Carbon rating tool enables eligible new buildings and partial rebuilds to measure, verify, and compare their upfront embodied carbon emissions—those created during material production, transport and construction activities before the building is operational.

This focus is timely. As operational emissions fall through grid decarbonisation, embodied carbon is on track to become the largest contributor to building sector emissions. According to NABERS, upfront embodied carbon alone can represent up to 80% of a building’s lifetime embodied emissions.

Why Modular Builders Should Take Notice

Prefab and modular construction methods are well-positioned to benefit from the tool’s methodology. Modular construction already aims to minimise waste and optimise material use through off-site fabrication. The NABERS tool strengthens this advantage by rewarding projects that reuse materials, incorporate verified low-carbon products, and streamline construction processes.

Emissions from factory-based construction and transport to site can be directly measured under the tool. Elements reused in their original form are rated with zero emissions, further supporting circular construction models common in modular building.

Additionally, modular developers can estimate their NABERS rating using the online calculator early in the design phase—offering the potential to refine material choices before fabrication begins.

Key Features of the NABERS Embodied Carbon Tool

• Comprehensive Coverage: Assesses emissions from the substructure, superstructure, envelope and building services.
• Material Reuse Incentivised: Demolition emissions are excluded, and reused components attract zero emissions ratings.
• Product-Specific Data Encouraged: Builders are urged to use Environmental Product Declarations (EPDs) and certified carbon data for accuracy.
• Alignment with Industry Standards: The tool adheres to both national and international carbon accounting frameworks.

Growing Importance for Construction Sector

Modular housing, commercial buildings, and industrial facilities are all eligible for certification. As more developers seek measurable sustainability credentials, embodied carbon ratings are likely to become a standard requirement.

The NABERS tool has been endorsed by the Green Building Council of Australia and will integrate with Climate Active and the Green Star Buildings framework—offering further pathways for modular projects to demonstrate verified sustainability.

For modular builders, early engagement with this rating system offers a way to deliver not only speed and cost benefits—but also credible, certified carbon performance.

Find the NABERS Embodied Carbon calculator HERE