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ReEnsemble – Decision support for optimal building system combinations across Whole-Life Carbon, Circularity, Cost, and Technical Performance

Objective

Buildings lock in carbon emissions, costs, and material waste for decades. Yet choices on envelopes, structures, and systems are often made in silos, missing practical low-carbon and circular options. ReEnsemble aims to break these silos by delivering a decision-support framework and optimisation engine for complete Building System Assemblies (BSAs), i.e. coordinated packages of construction products and technical building systems for new builds, renovation, and adaptive reuse.

Using interoperable data, ReEnsemble develops a Framework assessing Whole-Life Carbon (WLC), circularity, Life-Cycle Cost (LCC), and technical performance in one consistent workflow. The methodology is tailored to systematically support five core use cases: optimising material and system combinations for new builds, evaluating retrofit strategies for renovations, guiding complex retain-versus-rebuild decisions for adaptive reuse, setting reference profiles for WLC benchmarking, and verifying targets for procurement
and on-site conformity. Instead of black box answers, the engine rapidly translates these multi-metric evaluations into practical, automated decision dossiers, validating results and performance across four climatic contexts.

Crucially, ReEnsemble targets sector-level impact beyond isolated technical innovation. By delivering benchmark bands and standardisation packages, the project strengthens links to policy and real market pathways. The project is positioned to shape the implementation of the Energy Performance of Buildings Directive (EPBD) WLC requirements, the Level(s) framework, and CEN/TC 350 standards. By embedding these decisive factors into public procurement processes, ReEnsemble will accelerate the market uptake of circular solutions. The project targets at least 20% lower upfront carbon while keeping LCC within +/-10% of baselines, ensuring a viable transition to climate-neutral buildings.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

HORIZON-RIA - HORIZON Research and Innovation Actions

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Call for proposal

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(opens in new window) HORIZON-CL5-2026-02

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Coordinator

UNIVERSITY COLLEGE LONDON
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 497 359,54
Address
GOWER STREET
WC1E 6BT London
United Kingdom

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Region
London Inner London — West Camden and City of London
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

No data

Participants (13)

Partners (1)