The objective of this paper is to develop a automatic computation module for optimum stories in apartment buildings in order to assure the solar access right for neighboring areas. Compared to the existing solar access right analysis programs, the proposed solar access right analysis program is more improved and expanded by automating the computing process of optimum stories in apartment buildings. With the result of this research, it would be possible to furnish advanced information for an amicable settlement against the civil petition and disputes, to reduce waste of the time and money, and to improve the efficiency of solar access right analysis works.