Energy and environment issues such as the reduction of greenhouse gas emissions and ecological-friendly buildings are increasingly of interest in the Korean housing market. A number of technologies are considered appropriate in the Korean context, including roof-top gardens, low energy underfloor heating and renewable energy (RE) systems. To successfully adopt such technologies into domestic buildings, it is important to identify suitable technology types and capacities at an early design stage and effectively to integrate them in the building. In the study reported here, a procedure was established to enable a design team to evaluate the feasibility of new technologies using a simulation- based decision support system. The procedure was applied within a case study involving a multi-family residential building type being established within a major development programme termed ‘PLUS 50’. This paper presents the design procedure and the results from the case study.