This chapter performs narrative case studies of two cities (Daejeon, Hwaseong) with the corresponding urban simulations seeking applicability of compact city policies on the cities. Daejeon is the fifth biggest metropolitan city, a representative of developed urban areas. Hwaseong is a local city showing a trend of rapid development. The first part assesses the two cities in terms of compact city policies. It examines current relevant policies, such as the Daejeon Green City Plan, the Urban Renaissance Project of Daejeon and the Hwaseong-Dongtan New Town project, and suggests policy recommendations in terms of compact city policies. The second part addresses the importance of an integrated urban modelling in selecting the customised set of compact city policies for a city. In the same vein, it suggests a framework to develop an integrated urban model and performs two pilot simulations of the two cities. The simulations were performed using a newly developed model and a modified version of the current model based on parts of the framework.