This paper aims to clarify the procedures by undertaking case study of brownfields treatment for land contamination and redevelopment in the U. K. It investigated thirteen cases by using research methods of interviews to local governments and government organizations and site visits. It is found that government organization to integrate treating contaminated land and redevelopment played an important role to subsidize projects and undertake approaches. Planning system is also found to be important which requires to obtain planning permissions and to open information.