BREEAM and Embodied Carbon
How embodied carbon is assessed in BREEAM through life cycle assessment and Mat 01, what data your LCA needs, and how to cut whole-life carbon without losing credits.
BREEAM and embodied carbon
BREEAM addresses embodied carbon through life cycle assessment in the Materials category — principally the Mat 01 life cycle impacts credits — rather than as a single standalone carbon target. The assessment compares the whole-life environmental impacts of your building's structure and fabric, which is why the modelling has to start while the structural option is still open.
What the assessment needs from you
- A defined structural and fabric option set to compare, not a single frozen design.
- Quantities for the assessed elements — substructure, superstructure, envelope, internal finishes as applicable.
- Product and material data consistent with recognised environmental product declarations where available.
- The LCA carried out with a tool and scope acceptable under your registered scheme version.
Where embodied carbon is actually reduced
- Build less. Reuse of existing structure beats every material substitution — which is why refurbishment routinely outperforms new build on embodied carbon.
- Structural option choice. Frame and slab decisions dominate the result; they are settled early.
- Material specification. Cement replacement, steel sourcing and fabric build-ups matter, but at a smaller scale than structure.
- Durability and adaptability. Longer service life and adaptable layouts reduce whole-life impact and pick up related credits.
How this connects to net zero
Embodied carbon is one half of the whole-life carbon picture; operational energy is the other, handled in the Energy category. If a net zero commitment is driving your project, read BREEAM and net zero buildings and our life cycle assessment service, which covers LCA for both BREEAM and LEED submissions.
Need an LCA for BREEAM Mat 01?
Send the structural options and the RIBA stage you are at and we will scope the life cycle assessment to your registered scheme version.
Book a BREEAM assessment or request a fixed-fee quote — we reply the same working day with the scheme, timeline and fee for your project.
Frequently Asked Questions
How does BREEAM assess embodied carbon?
Through life cycle assessment in the Materials category, principally the Mat 01 life cycle impacts credits, which compare the whole-life environmental impacts of the building's structure and fabric.
When should the LCA be carried out?
While structural options are still open. An LCA produced after the frame is fixed can only report the outcome, not improve it.
Can the same LCA data be used for BREEAM and LEED?
Often much of the underlying inventory can be reused, but the scope, tool requirements and reporting differ between the schemes, so the assessment has to be prepared against each scheme's rules.
Related BREEAM pages
- BREEAM guidance hub — every scheme, category and rating explained
- BREEAM assessment cost — what drives your fee
- BREEAM pre-assessment — score forecast before design freeze
- How to achieve BREEAM Excellent
- BREEAM glossary — schemes, categories and credit references
Talk to a BREEAM assessor
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