Commercial Sustainability
Embodied carbon is becoming an increasingly important part of commercial sustainability. As buildings become more energy efficient and the electricity grid continues to change, the emissions associated with materials, products and construction are becoming harder for project teams to ignore. For Green Star projects, embodied carbon can form part of a broader conversation about materials, lifecycle impacts, upfront carbon reduction and responsible building performance.
Embodied carbon fits into Green Star projects by helping project teams understand and reduce the emissions associated with building materials, products and construction. It may connect with lifecycle assessment, upfront carbon calculations, material selection, embodied carbon reporting, NABERS Embodied Carbon and broader Green Star sustainability outcomes.
Embodied carbon refers to the greenhouse gas emissions associated with the materials and processes used to create a building. This can include emissions from extracting raw materials, manufacturing products, transporting materials to site, construction activities, replacement, maintenance and end-of-life processes.
In commercial projects, embodied carbon is often discussed in relation to structure, concrete, steel, aluminium, façade systems, glass, plasterboard, insulation, floor finishes, services equipment and other major material choices. These decisions can carry significant emissions before the building is even occupied.
Operational carbon is linked to how a building uses energy in operation. Embodied carbon is linked to what the building is made from and how it is constructed, maintained and eventually changed or deconstructed.
Green Star is a broader sustainability rating system, so it is not only concerned with energy use once a building is occupied. Green Star projects often need to consider the wider environmental impact of a building, including the materials and construction decisions that shape its carbon footprint.
This is especially important because embodied carbon happens early. A large portion of the emissions associated with materials and construction occur before the building begins operating. If project teams wait until late design or procurement to think about embodied carbon, many of the biggest opportunities may already be difficult to influence.
For Green Star projects, embodied carbon can support a stronger sustainability story by linking design, structure, façade, products, procurement, construction and lifecycle thinking into one coordinated approach.
The terminology around carbon can be confusing. Project teams may hear different phrases such as upfront carbon, embodied carbon, operational carbon, whole-life carbon and lifecycle carbon. These terms are related, but they do not always mean exactly the same thing.
| Term | Simple meaning | Why it matters |
|---|---|---|
| Upfront carbon | Emissions that occur before the building is occupied | These emissions happen early and are difficult to undo later |
| Embodied carbon | Emissions linked to materials, products, construction and lifecycle stages | Helps project teams understand material and construction impact |
| Operational carbon | Emissions from energy use during building operation | Connected to efficiency, electrification, controls and energy supply |
| Whole-life carbon | Carbon considered across the life of the building | Helps balance upfront, operational, replacement and end-of-life impacts |
In Green Star discussions, upfront carbon and embodied carbon are often the most immediate concerns because they are tied to design, material and construction choices made before the building is complete.
Lifecycle assessment, often shortened to LCA, is a method used to understand environmental impacts across the life of a product, material or building. In the context of a commercial building, LCA can help compare design options, material choices and construction approaches based on their environmental impacts.
LCA can be useful in Green Star projects because embodied carbon is not always obvious from appearance or cost alone. Two materials may look similar, but have different manufacturing impacts, transport impacts, replacement cycles or end-of-life outcomes. LCA gives the project team a more structured way to understand those differences.
The exact LCA scope should be aligned with the project brief, rating pathway and intended use of the results. It is not just a report to add at the end. It is most useful when it informs design and procurement decisions early enough to matter.
NABERS Embodied Carbon is a separate rating tool focused on upfront embodied carbon. It provides a way to measure and compare embodied carbon in eligible buildings, with a focus on emissions associated with materials and construction work before occupation. It does not replace Green Star, but it may sit beside Green Star on some commercial projects.
This distinction is important. Green Star is a broader sustainability framework. NABERS Embodied Carbon is more specifically focused on embodied carbon measurement and rating. A project may need Green Star for broader sustainability outcomes, NABERS Embodied Carbon for carbon intensity reporting or both depending on the client brief and project requirements.
Green Star can help frame the wider sustainability pathway. NABERS Embodied Carbon can help provide a focused rating for upfront embodied carbon. They can be complementary, but they are not interchangeable.
Embodied carbon is closely connected to materials and products. On commercial projects, large carbon impacts can be associated with concrete, steel, aluminium, façade systems, glazing, plasterboard, insulation, finishes and building services equipment. The choices made by architects, engineers, quantity surveyors, contractors and suppliers can all influence the final outcome.
Product transparency can also matter. Environmental product declarations, supplier data, responsible product selection and carbon intensity information can help project teams make better informed choices. However, this information needs to be gathered early enough to influence design and procurement, not only after products have already been selected.
For Green Star projects, material decisions should be seen as part of the sustainability strategy rather than only a specification exercise. The carbon impact of a material is one layer of the decision, alongside durability, maintenance, circularity, health, availability, cost and suitability for the project.
Embodied carbon should be considered early because the biggest decisions often happen at concept, schematic design and early documentation stages. Structural systems, façade design, major materials and procurement strategies can be difficult to change once the project is advanced.
These questions help embodied carbon become part of the project decision-making process rather than a late reporting task.
Embodied carbon matters because many carbon decisions are locked in before a building starts operating. Once the structure, façade, major materials and procurement strategy are set, the opportunity to reduce upfront impact can narrow quickly. For Green Star projects, this means embodied carbon needs to be considered early, not after the design is complete.
It also matters because commercial sustainability is no longer only about operational energy. Energy efficiency, electrification and renewable energy remain important, but materials and construction impacts are increasingly part of how buildings are assessed, compared and understood.
For project teams, embodied carbon provides a clearer way to connect design decisions with climate impact, procurement choices and long-term building responsibility.
Certified Energy helps commercial project teams understand how embodied carbon fits within Green Star, LCA, NABERS Embodied Carbon and wider building performance requirements. Depending on the project, this may involve lifecycle assessment, embodied carbon reporting, ESD consultancy, Section J or JV3 coordination, daylight modelling, thermal comfort analysis or other sustainability inputs.
Our role is to help clarify what is required, what information needs to be collected and how embodied carbon work can be coordinated with the wider sustainability pathway.
Early advice can help identify whether your project needs lifecycle assessment, embodied carbon reporting, NABERS Embodied Carbon support or Green Star-related sustainability inputs.
These related pages may help you understand how embodied carbon connects with Green Star, lifecycle assessment and wider commercial sustainability requirements.
Frequently Asked Questions
Embodied carbon can support Green Star projects by helping project teams understand the emissions associated with materials, products and construction before the building is occupied. It may connect with lifecycle assessment, material selection, upfront carbon reduction and broader Green Star sustainability outcomes.
Embodied carbon refers to greenhouse gas emissions associated with building materials, products, transport, construction, replacement, maintenance and end-of-life processes. Upfront embodied carbon usually refers to emissions that occur before the building is occupied.
No. Operational carbon relates to emissions from energy use during building operation. Embodied carbon relates to emissions associated with materials, products, construction and lifecycle stages of the building.
Lifecycle assessment may be relevant for some Green Star projects, especially where material impacts, embodied carbon, lifecycle impacts or upfront carbon reduction are part of the sustainability strategy. The exact requirement depends on the relevant Green Star pathway and project brief.
NABERS Embodied Carbon is a separate rating tool focused on measuring and comparing upfront embodied carbon. It may sit alongside Green Star on some commercial projects, but it does not replace the Green Star pathway.