The conference is organized by four European projects aiming at demonstrating on how low energy efficient buildings can be achieved at affordable costs for the benefit of a sustainable environment and how the users of the buildings can enjoy a comfortable environment at work and in everyday life. The conference addresses political decision makers and public authorities at the regional and local level. They are key players able to increase awareness among policy makers, support favourable legislative framework creation and public procurement and in many cases they represent the owners and promoters of public buildings. At the regional and local level, decision makers and authorities are the key to promote of energy efficient buildings and to moderate the consensus building among the stakeholders concerned, i.e. local businesses, SMEs and citizens.The conference will show how it is possible to achieve real results on new buildings being designed and built having in mind sustainability and efficiency through the experience gathered by those demonstrative projects. Experience gathered from the construction process and the roll out of new office and residential buildings on 14 sites in different European countries and Turkey support this statement.