Welcome to X-tendo and its ten features for better energy performance certificates!

X-tendo and its toolbox aim to provide public authorities and implementing agencies with improved compliance, reliability, usability and convergence of next-generation energy performance assessment and certification.


energy performance
certificate indicator

handling energy
certificate data

Building Logbook

Innovative Handling EPC Data

Innovative Handling EPC Data

Building Logbook

Logbooks are dynamic repositories storing relevant building data beyond the EPC which enable better and more effective use of the data. They are a promising tool to overcoming current data gaps and data barriers among market participants. Logbooks have been developed in several jurisdictions but with diverse objectives and with varying links to the existing EPC framework. The availability of consistent and reliable data can contribute to the creation of innovative services and business models, reduced transaction costs and administrative burdens for the building owner, more effective policymaking, as well as supporting the construction value chain.

X-tendo identifies how EPC registers and systems at different stages of development can support the development of logbooks. It also explores how logbooks can support other innovative features, such as one-stop-shops and tailored recommendations. For the test projects, X-tendo trials three different logbook approaches with the objective to link the EPC data to other datasets and solutions:

  • logbook as a data aggregator (Greece) through a webservice which is the backend to the logbook data exchange between the EPC registry, tax department and renovation financing programme
  • logbook integrated in the existing one-stop-shop portal (Portugal) to provide new functionalities and services to building owners and market participants
  • a dashboard (Estonia) bringing together the EPC data, real energy consumption data and an online application that support building owners to find information on potential renovation measures and energy savings.

News & Events

The Consortium

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Latest tweets on #Xtendoproject

RT @H2020ePANACEA: 📢In case you missed yesterday's webinar – or would like to watch it again, you'll find it online 👉https://t.co/gmwvMxsW9

RT @H2020ePANACEA: 📢In case you missed yesterday's webinar – or would like to watch it again, you'll find it online 👉https://t.co/gmwvMxsW9

RT @H2020ePANACEA: 📢In case you missed yesterday's webinar – or would like to watch it again, you'll find it online 👉https://t.co/gmwvMxsW9

See All



Buildings Performance Institute Europe (BPIE)

Rue de la Science 23, B-1040 Brussels

T. +32 (0) 2 789 30 00

E. Roberta.DAngiolella@bpie.eu

W. bpie.eu

Project Coordinator

Technische Universität Wien (TU Wien)

Gusshausstraße 25-29/370-3, A-1040 Vienna

T. +43 (0) 1 58801 370351

E. Lukas.Kranzl@tuwien.ac.at

W. eeg.tuwien.ac.at

General Inquiries


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