The building sector is responsible for a large proportion of emissions in Germany and in the Free Hanseatic City of Hamburg. In order to reduce these emissions, there are already renovation strategies and measures for residential buildings and public non-residential buildings; private non-residential buildings, on the other hand, have received less attention to date. These buildings are used by trade, commerce or industry, but also by cultural institutions such as district centers, social institutions such as day care centers, or health care facilities such as hospitals. In addition, some of these organizations are both owners and owner-occupiers of the buildings, while others rent their space from the real estate industry. This very heterogeneous mix of private non-residential buildings means that the needs of the users also differ greatly and various obstacles stand in the way of energy-efficient refurbishment. This project examines refurbishment options in the private non-residential building stock in Hamburg, analyzes the various obstacles and derives relevant measures.