Energy efficiency has become a relevant topic as regards the preservation and development of historic buildings and town centres. Investing in energy-efficient restoration of cultural heritage sites creates economic and social value and increases the quality of life for inhabitants and visitors. However, these effects are not yet sufficiently explored, quantified and economically exploited, although they become obvious wherever in energy-efficient restoration is invested: in start-ups, additional jobs, new living arrangements, more attractive infrastructure, increasing culture tourism. This community wants to make visible such social and economic effects. European best practices will show existing experiences in order to create support mechanisms for urban and regional development.