The master plans of Taipei City and Kaohsiung City prescribe a mechanism of community participation. If investors can obtain the consents of neighboring land owners through that mechanism, they will get land use variance which allow them to set up their businesses legally. Under the mechanism, the investors must initiate the process of negotiation. Coase theorem indicates that when transaction costs is less than the profits obtained from land use variance, trades will occur. Then the mechanism will function. The study is to simulate a negotiation between a community and a bowling alley, following the prescription of the aforementioned mechanism of community participation, and to compute transaction costs. The result shows that the sum of transaction costs is not large and the mechanism can work, that transaction cost will fall upon the initiating parties, and that decision costs consists of a large part of transaction costs.