As the EPBD enters a new phase,
EU-funded initiatives help turn policy into practice
For much of the past decade, discussions around Europe’s buildings have focused on targets, standards and legislative frameworks. Today, a different question is increasingly coming to the fore: how can these requirements be implemented in practice?
The revised Energy Performance of Buildings Directive (EPBD) is approaching a key milestone. By 29 May 2026, Member States are required to transpose the Directive into national legislation. Yet transposition is only one step in a much longer process. The broader challenge lies in establishing the governance structures, data systems, financing mechanisms and technical tools needed to translate policy objectives into real-world outcomes.
This shift from legislative design to practical implementation formed the backdrop to the event “Supporting EPBD implementation – practical solutions developed by EU-funded initiatives“, held in Brussels on 13 May 2026. Organised jointly by DG ENER and a range of EU-funded initiatives, the event brought together representatives from European institutions, Member States, research organisations, industry and project consortia to discuss what implementation may require in practice.
Implementation as a systems challenge
The discussions reflected a growing recognition that implementation extends beyond regulation alone. While the EPBD provides a common framework, delivery depends on a wider ecosystem of actors, tools and support structures.
National authorities must establish processes for monitoring progress and managing building performance data. Financial institutions require reliable information to support investment decisions. Market actors need practical tools that can be integrated into existing workflows. At the same time, building owners and citizens increasingly depend on clear and trustworthy information to navigate renovation decisions.
Implementation therefore appears less as a single policy exercise and more as a systems challenge, where governance, finance, digitalisation and technical methodologies need to function together.
Building data are becoming implementation infrastructure
One of the recurring themes throughout the event was the evolving role of building performance data.
Energy Performance Certificates (EPCs), the Smart Readiness Indicator (SRI), national databases and observatories have traditionally been viewed as assessment or reporting tools. Increasingly, however, they are becoming part of the infrastructure that supports implementation itself.
Building performance data are now being used to inform renovation strategies, monitor policy progress, prioritise investments and support public decision-making. As a result, questions of comparability, transparency and interoperability are becoming increasingly important.
When data are collected using different methodologies or stored in disconnected systems, it becomes more difficult to compare results, evaluate progress or coordinate action across regions and Member States. Conversely, when information can be understood and exchanged consistently, it may support more coherent planning and implementation.
A growing implementation ecosystem
The event also illustrated the emergence of a broader European ecosystem dedicated to supporting EPBD implementation.
Alongside national authorities and European institutions, a growing number of EU-funded initiatives are addressing different aspects of the implementation challenge. Some focus on monitoring and policy support. Others work on financing mechanisms, renovation pathways, digitalisation or market uptake. Increasingly, these initiatives are being developed not as isolated projects but as complementary contributions to a shared implementation landscape.
This was particularly visible in discussions involving projects such as OpenBEP4EU, iEPB, SmarterEPC and BREEZE, which each address different aspects of building performance assessment and implementation support. While their approaches differ, they share a common objective: helping translate EPBD requirements into practical and usable solutions.
From standards to practical tools
Within this wider ecosystem, OpenBEP4EU focuses on the technical foundations of building performance assessment.
The project is developing an open-source calculation engine based on the CEN/ISO Energy Performance of Buildings standards. By translating these standards into transparent and testable code, the project seeks to support greater consistency, comparability and reusability across EPC and SRI implementations.
This work is closely connected to broader discussions around interoperability and digitalisation. As building performance information increasingly flows between assessment tools, national databases, renovation planning instruments and policy monitoring frameworks, the ability of systems to communicate and operate using shared methodologies becomes increasingly relevant.
Rather than creating new data, many current implementation efforts focus on making existing information more usable, comparable and accessible across systems and stakeholders.
Looking beyond transposition
The transposition deadline represents an important milestone for the revised EPBD, but it also marks the beginning of a new phase.
As Member States move from legislative adoption towards practical implementation, attention is increasingly turning towards questions of delivery. How can building performance information support decision-making? How can implementation progress be monitored? How can technical frameworks be applied consistently across different contexts? And how can the growing ecosystem of European initiatives contribute to supporting national efforts?
While answers will differ across countries and building stocks, the discussions in Brussels suggested that collaboration, interoperability and shared methodologies are likely to play an increasingly important role in the years ahead.
For OpenBEP4EU, this reflects a broader ambition: helping ensure that building performance data and assessment methods are not only technically robust, but also usable in the practical implementation of Europe’s building transition.