Recently the “Landscape Law” supports the implementation of local city's urban design plan. Though for consensus making between the government and the stakeholders, there have been few visual tools to communicate together on the existing and new urban design. This research deals with a new analytical and generative methodology for townscape renovation and the verification of the effectiveness of the subsidy program based on Design Code. By analyzing and visualizing the distribution of the groups of similar housing types with mathematical graphs, this study clearly shows the chronological changes of the urban fabrics and how to control them
