The study aims to develop energy conscious dwellings in climatic conditions of Ankara. Since the computer program SUNCODE-PC is used for thermal performance analysis, an hourly climatic data set for an average year has been prepared. Two design proposals are developed and compared: one of them is designed with conventional features and the other is designed energy consciously. Improvement studies are conducted on the energy conscious design. (C) 1999 Elsevier Science Ltd. All rights reserved.