Embodied Carbon: The Half of a Building's Carbon Footprint the Industry Is Still Ignoring

The global buildings and construction sector now accounts for 37% of global CO2 emissions. Most of the conversation around decarbonising buildings focuses on what happens once the lights are on energy bills, cooling loads, operational efficiency. But there is another half of the story that the industry has been slow to address, and it starts before a single occupant walks through the door.

Embodied carbon is the carbon emitted during the extraction, manufacture, transportation, assembly, maintenance, and end-of-life disposal of building materials. Unlike operational carbon, which accrues year by year and can be reduced through better systems and management, embodied carbon is largely locked in at the point of construction. Once concrete is poured and steel is fixed, those emissions have already entered the atmosphere.

Why This Is the Conversation the Industry Keeps Postponing

Buildings have long been evaluated on what they cost to run. Energy ratings, utility benchmarks, and HVAC efficiency have dominated the sustainability conversation because they translate directly into monthly operating expenses. Embodied carbon, by contrast, does not appear on an energy bill. It does not show up as a cost until regulators, financiers, or procurement frameworks require it to be reported.

That is changing, and faster than many developers in Southeast Asia and beyond have anticipated.

According to the World Green Building Council, upfront carbon emissions from construction will be responsible for half of the entire carbon footprint of new construction between now and 2050. As buildings become more energy-efficient and grids decarbonise, the balance is shifting. Operational carbon will decrease as a share of whole-life emissions. Embodied carbon, if left unaddressed, will become the dominant contributor.

A 2025 meta-analysis published in the Journal of Building Engineering found that current best-practice construction techniques can already achieve a 45.7% reduction in upfront embodied carbon compared to business-as-usual. The technologies and materials to act exist now. What is missing is the industry-wide recognition that this is a financial and regulatory issue, not just an environmental one.

What Is Actually Driving Embodied Carbon in Buildings

The largest contributors are structural and envelope materials: concrete, steel, aluminium, and glass. In tropical climates across Southeast Asia, where construction is booming and concrete-heavy construction is the default, the embodied carbon footprint of a typical commercial building can be substantial before any energy is consumed.

Concrete is the most-used construction material in the world and one of the most carbon-intensive to produce. Cement production alone accounts for approximately 8% of global CO2 emissions. Steel, while highly recyclable, carries significant embodied carbon in its primary production phase. Aluminium, widely used in curtain wall systems and cladding, is among the most energy-intensive materials per kilogram.

The construction phase itself, including site clearance, logistics, and machinery, adds to the total. And at end of life, materials that cannot be recirculated into new construction extend the embodied carbon chain further.

Understanding a building's embodied carbon requires a Life Cycle Assessment, or LCA. An LCA tracks carbon across four phases: material production (A1–A3), construction (A4–A5), building use and maintenance (B1–B5), and end of life (C1–C4). A fifth category, D, accounts for the potential for materials to be recovered and reused. The earlier an LCA is carried out in the design process, the more influence the design team has over the outcome.

The Regulatory Direction: It Is No Longer a Question of If

What was once a voluntary measure among sustainability-focused developers is now entering regulatory and procurement frameworks across multiple markets.

In the European Union, the revised Construction Products Regulation entered into force in January 2025 and began requiring manufacturers to declare the Global Warming Potential of major construction materials from January 2026, with full environmental performance enforcement following from 2027. The

EU taxonomy for sustainable finance explicitly incorporates whole-life carbon as a criterion for classifying buildings as sustainable investments.

Singapore launched its first national benchmark for embodied carbon in concrete in March 2026 described at launch as a critical step forward for Southeast Asia's built environment. The benchmark provides a standardised measurement framework that gives industry transparency to make informed decisions about low-carbon materials. It is the first such framework in the region, but it will not be the last.

In the United Kingdom, mandatory whole-life carbon assessments are already required for major planning applications in several jurisdictions. BREEAM, one of the world's most widely used green building certification systems, incorporates embodied carbon assessment as a core pathway to higher ratings.

For developers in Thailand, Vietnam, Indonesia, and across the region, these frameworks represent both a direction of travel and a timeline. Projects being designed today for delivery in the late 2020s will be operating in a market where embodied carbon reporting is expected and in some financing contexts, required.

The Link to Financing

Green bonds and sustainability-linked loans are increasingly tied to whole-life carbon performance, not just operational energy metrics. The IFC's EDGE certification, widely used across Southeast Asia, addresses material efficiency as a pathway to certification including reductions in embodied energy of building materials. As green finance frameworks mature, the gap between buildings with documented carbon performance and those without will translate directly into cost of capital.

Institutional investors and building sector investment trusts operating under ESG mandates are beginning to ask for embodied carbon data as part of asset due diligence. Buildings that cannot provide this data, or that score poorly when assessed, face growing headwinds in acquisition, refinancing, and exit.

The message for developers is straightforward: embodied carbon is moving from a voluntary reporting metric to a financial variable.

What Can Be Done at Project Level

The good news is that embodied carbon can be significantly reduced through design decisions that do not require exotic technologies or cost premiums if they are made early enough.

Material selection is the primary lever. Low-carbon concrete mixes using supplementary cementitious materials such as fly ash or ground granulated blast-furnace slag can reduce the carbon intensity of structural concrete by 30 to 50% without compromising structural performance. Responsibly sourced mass timber, including cross-laminated timber, stores carbon for the life of the building and can substitute for carbon-intensive steel and concrete in appropriate structural applications. Recycled steel, where supply chains allow, carries a fraction of the embodied carbon of primary-produced steel.

Structural efficiency matters. Oversizing structural elements a common outcome of conservative engineering assumptions increases material use and embodied carbon without adding value. Optimised structural design, supported by digital tools, reduces the volume of material required to achieve the same performance.

Procurement transparency is becoming possible. Environmental Product Declarations are now available for an increasing range of construction products, enabling design teams to compare the embodied carbon of competing products on a like-for-like basis. Specifying materials with verified EPDs is the first step toward a documented low-carbon procurement approach.

Circular economy thinking extends the carbon accounting. Buildings designed for disassembly with structural systems that can be recovered and reused, and fit-out materials that can be removed without damage carry a lower whole-life carbon footprint. This is design thinking, not a product specification, and it requires the brief to include end-of-life consideration from the outset.

Certification frameworks provide structure. LEED v4.1 includes a Materials and Resources credit category that rewards whole-life carbon thinking, EPD sourcing, and low-carbon material selection. BREEAM's Materials category goes further in requiring LCA-based assessment for higher ratings. These frameworks do not solve the embodied carbon problem on their own, but they create the accountability structure that keeps it on the design agenda.

The Window to Act Is at the Start

The most important thing to understand about embodied carbon is that the design team's influence over it diminishes rapidly as a project progresses. Concept and schematic design stages are where structural systems are chosen, where material strategies are set, and where the building's carbon trajectory is determined. By the time detailed design is underway, most of the significant decisions have already been made.

This is why embodied carbon cannot be treated as a sustainability add-on to be addressed during documentation. It is a design brief issue. Developers who want to reduce their portfolio's embodied carbon need to embed that requirement into the brief before the architect begins work on form.

The buildings and construction sector now accounts for nearly 50% of global material extraction and 37% of global emissions. That share is not going to shrink unless the industry addresses both what buildings consume and what they are made of.

The buildings being designed and built today will still be standing in 2060 and beyond. The carbon emitted to construct them cannot be taken back. For developers, designers, and asset managers across Southeast Asia and the world, that is not an abstract observation. It is a design constraint, and one that is more manageable at the start of a project than at any point that follows.

SOURCES

• World Green Building Council. Bringing Embodied Carbon Upfront. 2019. (Available via WorldGBC website)

• GlobalABC, International Energy Agency (IEA), and United Nations Environment Programme (UNEP). Global Status Report for Buildings and Construction 2024–2025. (Available via GlobalABC website)

• Wang, et al. Global Embodied Carbon in Buildings: Meta-analysis and Science-based Decarbonization Through Technological Solutions. Sustainable Futures, December 2025. (Available via ScienceDirect)

• Carbonwire. Singapore Launches First National Benchmark for Embodied Carbon in Concrete. March 2026. (Available via Carbonwire website)

• International Energy Agency (IEA) and ASEAN Centre for Energy. Roadmap for Energy-Efficient Buildings and Construction in ASEAN. (Available via IEA publication page)