The aim of the Lifestyle project is to analyse the CO ₂ emission reduction potential of lifestyle change. The analysis is carried out by examining the direct and the indirect energy contents of the average Dutch household consumption. An overview of the past developments of Dutch sector energy intensities is produced and its consequences for the average household energy requirement are studied. Also differences in energy requirement related to differences in lifestyle are assessed. Calculations of the Dutch household expenditure survey has resulted in an overview of the energy requirement per income and spending subcategory. The correlations between some relevant household factors are determined and discussed. #Harry Wilting, Wouter Biesiot and Henk Moll, Centre for Energy and Environmental Studies (IVEM) University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands