The purpose of this study is to analyze and evaluate the American style housings in Okinawa by looking at their reutilization to non-dwelling functions. As survey methods, observations of housings and interviews with residents were used. Some results are as follows: 1) The American style housings of off base were provided by private sectors under the regulation and specification of U.S. military base. 2) By the survey, 3,726 housings are still existing and 293 housings are reutilized to non-dwelling functions. 3) As the reutilization, 3 types of reutilize styles were observed and it shows the spatial diversity. 4) The reutilization process is divided by 3terms, releasing to the local resident at the beginning, increasing of local residents, and extension of reutilization. The utilization is greatly affected by the rectangle shape of the housing as the provision and the reutilized space assures the residents that they make the diverse and flexible life that is stemmed from their autonomous activities.