The aim of this study is to clarify the environmental performance level of housing evaluation cases in CASBEE Fukuoka. In addition, we considered the influence of CASBEE on the architectural design of apartment buildings. As a result, it became clear that there are differences in environmental performance levels depending on the supply form and the housing company. It was also found that there are two design methods, the point-added type and the deducted type, depending on the CASBEE target setting. This knowledge will be useful in revising CASBEE performance evaluation methods in the future.