1. CONTENTS (1) RESEARCH OBJECTIVES With limitations of the supply-centered apartment house policies, social interest in the maintenance/management of the existing apartment houses is increased. Since the maintenance cost of the apartment houses should be continuously paid even after purchasing, it is expected to operate as a decision factor of purchasing intention when selecting residence. Based on the consumers' common thinking in which the maintenance cost of apartment houses might be less when the number of households is increasing, this study aims to analyze if it has influenced on the actual maintenance cost and also works as a purchasing decision factor. (2) RESEARCH METHOD The regression analysis is used frequently when analyzing the influence of the maintenance cost of apartment houses on their prices because it has excellent explanatory power for factor variables as a statistical technique to understand correlations between more than two variables. Thus this study is based on the statistical approach. In other words, the regression analysis will be conducted as setting region, elapsed months, heating system, No. of households, area of exclusive use space, maintenance cost and traffic condition as independent variables, and also setting prices of apartment houses as a dependent variable. (3) RESEARCH RESULTS Out of seven independent variables, three variables including No. of households, elapsed months and ownership division had significant influence on the maintenance cost. The No. of households was selected as a variable in 1% significance level while the elapsed months was selected as a variable in 5% significance level. The ownership division was selected in 10% significance level. The apartment houses with individual heating system impose higher maintenance cost while the corridor access system shows less maintenance cost in regards to equilibrium structure. Also, the maintenance cost is influenced by various elements so that it could be different in dependent on the maintenance methods. 2. RESULTS In summary of the analysis results, we can obtain the conclusion like below. Focusing on total maintenance cost as it includes general maintenance cost, it is decreased when the equilibrium structure is the type of corridor access. In regards of heating system, the maintenance cost is declined with the local heating system. For other factor variables, the maintenance cost gets higher as the elapsed months (degree of deterioration) are longer. The more the No. of households is, lastly, the less the maintenance cost is.