CHRONICLE will deliver a holistic, life-cycle performance assessment framework and tool-suite for different building variants, supporting sustainable design, construction and/or efficient renovation and investment decision making. It will be methodologically integrate ongoing initiatives, like EPCs, Level(s), SRI, under the umbrella of the Digital Building Logbook concept. Performance will be assessed by means of well-defined KPIs, based on both static (by design) as well as dynamic information (sensor measurements) appropriately tailored to different types of use and building lifecycle phases (new or existing buildings under refurbishment). Continuous monitoring and analysis of the actual building performance over its lifetime, will be based on a powerful digital twin framework. The proposed data availability and accessibility within CHRONICLE will extend the limits of the EU energy related policies while the aggregated EPC advanced information will facilitate efficient energy planning