Real estate transactions and land sales are diversified into many forms of trade as well as the quantitative. The law requires a special relationship in their respective fields, is becoming very complex and the relevant law and regulations of public law and finance. mineral rights have been placed in the general theory in order to respond to changing conditions and real estate in the land of the land buyers. I would like to understand what their individual theories. Apartment, and the sale of agricultural land, residential building lots for sale, as well as by some special property such as agricultural land transactions, land, real estate and understand the theory of general, residential land sales, residential builder, can resolve the most widely rental unit construction.