The training aims to build knowledge of the challenges, barriers and experiences associated with retrofitting multi-unit developments (MUDs) in Ireland. It focuses on initiating the retrofit decision process, understanding the process for a long-term retrofit planning, and the steps to take in order to accelerate MUD retrofitting. It is structured into four modules: Project Findings, Retrofitting Needs and Future Proofing, Finance Informed Decision Making, and Engagement and Mobilisation. Participants will have access to video recordings and presentation. The training was implemented as part of the EU-funded technical support project “Multi-country support to advance building decarbonisation”. The project was funded by the European Union vi