Over the last 10 years, the importance of energy efficiency in European policy has steadily increased. Today, energy efficiency is a key element on the EU’s political agenda. Policy makers are progressively recognising energy efficiency as a suitable means to address the triple challenge of economic recovery, energy dependency and climate change. Starting in 2006, Energy Efficiency Watch (EEW) projects accompanied this process. The EEW facilitates the implementation of EU energy efficiency policies by collecting information on this process and by providing this information to a variety of stakeholders, including European, national, regional, local policy makers and experts.