The purpose of this study is to help reasonable and definite decision making when considering the remodeling project of apartment buildings in the future by analyzing the actual numeric results of project-level capital gains of 5 actual remodeling projects of apartment complex recently completed in Seoul. The research showed that the current asset value is one of the most important and sensitive factors of the remodeling projects' decision making because the success of remodeling projects with less than a certain level of current value could not be guaranteed after reviewing the findings from this research on the actual projects completed. The study has a limitation since it is based only on 5 cases in a city in a narrow time period so that it is expected to be developed in the future with more cases accumulated.