EPC RECAST will provide a sound process and toolbox supporting the development, implementation and validation of a new generation of the Energy Performance Certificate (EPC), one among the relevant instruments at the basis of renovation in existing buildings. It structures energy assessment, decision support on energy retrofit projects, development and articulation of financing instruments (public and private), benchmark of building assets and market value recognition. The goal is to improve such certification with a clear focus on residential buildings, for which retrofit is one of the most challenging and pressing issue nowadays at European level. A list of challenges still undermine the full potential of the EPCs as they are now, such as: the great variety of the assessment results (depending on the assessor, the input data and the calculation tools), the lack of understanding between predicted and actual energy performances, etc. In addition, an owner and occupant-centric vision should be at the basis of the new EPC design, allowing for a European benchmark and public policies analysis in a very heterogeneous context. Improving the EPC means unlocking confidence, decision support and articulation for financing in residential building. 7 European countries are represented by the 11 Partners of the Consortium, led by CSTB. EPC RECAST is a 40-month project started on 1 September 2020, with a total budget of about 2,751 M€. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 893118.