The Sustainable Development Goals (SDGs) are a new ambitious benchmark that the United Nations has adopted to scientifically assess the advancement made by single countries in sustainable growth. The European Union (EU) fully embraces these objectives and is recently anchoring to these international standards many of its plans on sustainability and development. Inevitably, the growing importance of the SDGs for the EU programming and the acquis communautaire has consequences on a wide set of EU policies, including enlargement and accession. Indeed, even though the Copenhagen criteria do not explicitly mention environmental goals, the political dialogue on the SDGs between Brussels and all the EU candidate countries today is vibrant but not much investigated. This Policy Brief aims to shed a light on the relationship between SDGs and the EU policy of enlargement, focusing its attention on the Western Balkan region. The research will analyse the state of the art of the SDGs in different Western Balkan nations on their path for accession, trying to underline differences and similarities, and inquiring whether the implementation of these goals has an impact over the ongoing political dialogue between Brussels and the region.