The global shift towards sustainability and energy efficiency has significantly influenced the building sector, which plays a critical role in energy consumption, greenhouse gas emissions, and the depletion of natural resources. This is a key driver behind the European Union’s push for decarbonizing the building stock, through the introduction of concepts like Nearly Zero Energy Buildings (nZEBs) and Zero Energy Buildings (ZEBs), presented in the current version of the Energy Performance of Buildings Directive (EPBD). This thesis introduces a versatile and adaptable tool designed to optimize building energy performance and reduce carbon emissions. It integrates easy end-user access and results visualisation, compliance with current European Union regulations, while offering a practical and platform-interoperable application channeled towards a Building Information Model (BIM) environment.