Embodied Carbon: The Number Your Bangkok Project Is Not Yet Measuring

Most green building conversations in Bangkok start and end with operational carbon: energy use, cooling loads, HVAC efficiency, and monthly electricity bills. These are important. But they account for only part of a building's total carbon footprint, and for new construction, they may not even be the most significant part.

Embodied carbon is the number most Bangkok project teams are not yet measuring. That is about to change.

What Embodied Carbon Is

Embodied carbon refers to the greenhouse gas emissions associated with materials and construction processes throughout a building's lifecycle. The built environment generates 42% of annual global greenhouse gas emissions, with 27% coming from building operations and 15% from building materials and construction processes. GRESB

Carbon emissions released before a built asset is used, referred to as upfront carbon, will be responsible for half of the entire carbon footprint of new construction between now and 2050, threatening to consume a large part of the remaining global carbon budget. World Green Building Council

Unlike operational carbon, which can be reduced over time through efficiency upgrades, renewables, or behaviour change, embodied carbon is locked in at the point of construction. Once concrete is poured and steel is fabricated, those emissions have already entered the atmosphere. No amount of operational improvement can offset them.

Why It Is Not Being Measured

Operational carbon has dominated building sustainability strategies because it is the visible cost. Energy bills arrive every month. Cooling systems fail. Electricity tariffs rise. Embodied carbon, by contrast, is invisible in the cost model. It does not appear on a utility statement and it has not, until recently, appeared in any mandatory reporting framework.

GRESB's 2025 Real Estate Benchmark found that 50% of participants now track embodied carbon emissions of their developments, compared with only 23% in 2023. That is significant progress globally, but it also means that half of even the most sustainability-conscious institutional investors are still not measuring it. In Thailand, where whole-life carbon reporting is not yet mandated, the number tracking embodied carbon is considerably lower. NAIOP

Why Thailand Project Teams Need to Start Now

Two developments are making embodied carbon a near-term priority for Bangkok project teams, not a future consideration.

First, Thailand's Climate Change Act, approved by Cabinet in December 2025, establishes the legal framework for mandatory greenhouse gas reporting across thousands of organisations. While the Act's initial focus is on Scope 1 and Scope 2 emissions, the direction of travel globally, and within the Act's own secondary legislation, is toward whole-life carbon accounting. Project teams that build embodied carbon measurement into their processes now will be ahead of the reporting obligations as they mature.

Second, the Thailand Taxonomy is creating a direct financial incentive. Under the Thailand Taxonomy, a whole life carbon assessment must be completed and reported in line with current guidelines. Even where green certification such as LEED, TREES, or EDGE is used as the compliance route, it does not remove the mandatory obligation to conduct and report a whole life carbon assessment. For developers seeking access to green loans and sustainability-linked financing, this is not a voluntary exercise. GBCE

Where the Emissions Come From

Concrete, steel, and insulation are among the largest contributors to embodied carbon emissions due to their energy-intensive production processes. The majority of these emissions occur before a building's construction phase, meaning choices made at the design stage determine a project's long-term carbon footprint before a single worker arrives on site. RMI

For Bangkok projects, this points to three areas where design decisions have the greatest impact: structural systems, facade materials, and fit-out specifications. Concrete and steel are unavoidable in high-rise construction, but the carbon intensity of those materials varies significantly depending on mix design, supplier origin, and the proportion of recycled content.

What Project Teams Can Do

STEP 1: Conduct a whole life carbon assessment during early design. The most cost-effective point to reduce embodied carbon is before structural and material decisions are made. A whole life carbon assessment at concept stage gives the project team the data to make informed choices rather than retrospective ones.

STEP 2: Request Environmental Product Declarations from suppliers. More than 9,000 Environmental Product Declarations were published in 2025 according to the International EPD system. This data is increasingly available and gives project teams a verified basis for comparing the carbon intensity of competing materials. Tunley Environmental

STEP 3: Align with certification frameworks that include embodied carbon. For Thailand Taxonomy alignment, accepted certifications include TREES, LEED, and EDGE, but each must meet a minimum level of achievement. For TREES and LEED, Gold certification is required as a minimum alongside a 30% improvement above ASHRAE 90.1 standards. For EDGE, Advanced or Net Zero certification is required with no carbon offsets. GBCE

STEP 4: Engage the supply chain early. Embodied carbon reduction is not a design-only exercise. Structural engineers, quantity surveyors, and procurement teams need to be part of the conversation from the earliest stages for the data to be useful and the decisions to be actionable.

The Competitive Shift

According to JLL Thailand, 96% of Thailand-based occupiers expect fully green-certified office portfolios by 2030, compared with only 17% today. Green building certification is expected to become non-negotiable for two-thirds of occupiers by 2030. JLL

Occupier expectations are already shifting toward certified, low-carbon assets. As whole-life carbon reporting becomes embedded in green finance frameworks and the Climate Change Act's secondary legislation takes shape, the gap between buildings that measure and manage embodied carbon and those that do not will become a measurable difference in asset value and financing access.

The number most Bangkok projects are not yet measuring is the one that will increasingly determine how they are valued.

SOURCES

GRESB, "What Is Embodied Carbon in the Building Sector and Why Does It Matter?", January 2026. https://www.gresb.com/what-is-embodied-carbon-in-the-real-estate-sector-and-why-does-it-matter/

World Green Building Council, "Embodied Carbon." https://worldgbc.org/climate-action/embodied-carbon/

Rocky Mountain Institute (RMI), "Embodied Carbon 101: Building Materials." https://rmi.org/embodied-carbon-101/

Tunley Environmental, "Embodied Carbon in Construction Materials." https://www.tunley-environmental.com/en/insights/embodied-carbon-in-construction-materials

Green Design Consulting, "Thailand Taxonomy and the Future of Green Buildings," February 2026. https://www.greendesignconsulting.com/single-post/thailand-taxonomy-and-the-future-of-green-buildings

JLL Thailand, "A Closer Look at Bangkok CRE's Flight to Green." https://www.jll.com/en-sea/insights/a-closer-look-at-bangkok-cres-flight-to-green

International EPD System, 2025.