|Rents are a major influence on the profitability of investment decision factor in real estate market factor. To improve profitability in the private sector and to mature the integrity of the market ecosystem in public sector, decision factors that affect the rent as a kind of real estate major research analysis has been studied. In prior research, the present status is studied mainly with Medium-Large size offices managed by a professional care. An analysis of the overall commercial real estate for determinants of rents and a study on the policy or an alternative is insufficient compared to the interest situation. Meanwhile, for the lessor and lessee`s sustainable growth, a interest is increasing for government policies. Especially, for a store long-term relief, one of policies of Seoul, remodeling support policy established based on the correlation of the deterioration level and rent amount is unlike the intended results, to show a negative aspect that the policy accelerate Franchise entry and rent rise. This is the hypothesis of this study. Empirical Analysis result, about commercial real estates located roadside and Subway access area, the longer their age, their rent is continuing to fall. Otherwise, the commercial real estates located behind have other meaningful results in some variables. In particular, rather, their age is old, rents rising results are confirmed. The results of this study, prove the hypothesis of this study that the older building rent rises in business district behind to a considerable part rent the first floor. It means physical improvement of building such as remodeling is favorable business district in roadside than behind.