Within the REVERTER project (co-funded by the LIFE programme), communication and dissemination partner WIT Berry has developed four Digital One-Stop Shops (DOSS) for the pilot regions of Brezovo (Bulgaria), Coimbra (Portugal), Athens (Greece), and Riga (Latvia). These online platforms are designed to make the process of home renovation easier and more accessible, especially for vulnerable households. The White Paper presents the key findings from this work, based on survey data, hotspot analyses and assessments of vulnerable consumers’ needs in the four pilot areas. It provides a comprehensive overview of the barriers to energy renovation and showcases the role of DOSS platforms in overcoming them. The White Paper highlights the main results and takeaways for each Digital One-Stop Shop, detailing how each platform addressed local needs and challenges. It also provides practical recommendations for those planning to develop or maintain DOSS platforms — offering guidance on technical design, user engagement, and communication strategies to effectively reach and support vulnerable consumers. These insights offer valuable direction for policymakers, local authorities, and practitioners committed to scaling up deep energy renovations and fostering inclusive, user-centered digital solutions for energy efficiency.Energy efficiency is central to achieving the European Green Deal objectives and meeting the EU’s climate neutrality targets. Buildings remain one of the largest sources of energy consumption and greenhouse gas emissions in Europe, and improving their performance is essential for reducing emissions and addressing energy poverty — a pressing issue affecting millions of households across the EU.