A total of 38 apartment building surveys following the EPIQR methodology have been performed in seven European countries. The audits included the energy systems, indoor environmental conditions and building envelope. The collected data provide a novel overview on the condition, construction characteristics, installations, energy systems and consumption of existing residential buildings throughout Europe. A comparative analysis of the data will reveal the common characteristics and differences in terms of energy behavior, indoor environmental quality and building structure for the existing building stock; in Europe and examine potential implications of the forthcoming European action on labeling of buildings. (C) 2000 Elsevier Science S.A. All rights reserved.