A2PBEER is an innovating 4-year European project which seeks to develop a cost effective, “energy efficient retrofitting” methodology for public buildings, drawing on the expertise of over 20 partners. Buildings account for around 40% of total final energy consumption in Europe. Energy-efficient retrofitting has an essential role to play in meeting the EU's 20-20-20 targets. It is possible to make a greater impact through interventions in non-residential buildings, given that they have 40% higher energy consumption than residential buildings. 30% of non-residential buildings in Europe are public buildings. A2PBEER focuses on energy-efficient retrofitting of public buildings.