Embodied Carbon in Focus at the End of 2025

TL;DR

In 2025, embodied carbon shifted from a niche topic to a decision-relevant factor. The focus is clearly moving away from individual projects toward comparable, controllable data at project and portfolio level – particularly in the Scope 3 context. Methodology, data quality and early availability are becoming the decisive factors.

By the end of the year it is clear: embodied emissions are now among the central topics in the construction and real estate sector. The discussion has gained depth and shifted noticeably – away from isolated lighthouse projects toward systematic questions spanning entire project pipelines and portfolios. For investors, developers and building owners, it is no longer about whether, but about how: how can embodied emissions be mapped early, reliably and comparably – where decisions take effect?

3rd Swiss Symposium on Embodied Emissions – from relevance to implementation

The 3rd Swiss Symposium on Embodied Emissions in the Construction Sector impressively demonstrated how broadly the topic is now supported: representatives from the real estate and construction industry, specialist authorities, label organizations, politics and research in one place.

For the first time, the symposium took place in a combined format for building construction and civil engineering. Two disciplines with different data levels, standards and decision logics – and, precisely for that reason, with great potential to learn from one another.

As an event partner, we had the opportunity to hold many conversations and gain direct insights into where the market is heading. It became particularly clear that demand for data-based evaluation and optimization is growing most strongly where methodological clarity meets operational reality.

Scope 3 in the real estate context: methodology as a common language

An important frame of reference is provided by the Scope 3 white paper of the Charta Kreislauforientiertes Bauen. The Charta brings together leading Swiss building owners and investors.

The white paper shows how emissions from the construction and life cycle of buildings are assigned to the relevant Scope 3 categories and how existing standards – in particular SIA 2032 – can be used for this. This creates a practical basis that addresses both the project and portfolio level.

Central to this is the clear categorization of the three calculation approaches:

• Component-based life cycle assessment in accordance with SIA 2032
• Benchmark-based extrapolations for standardized applications
• Spend-based approaches where data depth is limited

At vyzn, we deliberately focus on the component-based methodology, as it enables the most precise statements about embodied emissions. In practice, however, it is often labor-intensive and available late. This is exactly where our software simplifies the process step by step and model-based, so that reliable CO₂ metrics are available early in the project. These can be compared, aggregated and used for variant studies – with no methodological compromises.

From project decisions to portfolio management

A recent analysis by Wüest Partner shows that the most effective levers for reducing embodied emissions lie early in the project – in structure, construction, material choice and usage assumptions.

For investors, this means: embodied emissions must be considered early in construction projects (or rather "ordered") and only become controllable once they are systematically comparable across many projects. Individual life cycle assessments provide important depth but are not sufficient for strategic portfolio decisions. What is needed are consistent data models with which variants can be compared, emission hotspots identified and impacts on the overall portfolio assessed.

Conclusion

By the end of the year it can be said: embodied emissions are technically established, methodologically tangible and operationally relevant. The discussion has moved on – the focus today is on implementation and impact. What matters is early transparency, clear methodology and scalable evaluations.

Anyone who wants to effectively reduce embodied emissions doesn't need further debates on principles, but data that enables decisions. That is precisely where it is decided how calculation becomes real impact.