This research aims to analyze how the implementation of building policies in the Melawi River borderline area in Sintang is based on the Edward III Model: communication, resources, disposition and bureaucratic structure. The main problem in this research is that there is a misalignment between the situation in the field and the provisions of the prohibition of building in the Melawi River borderline area in Sintang in Regional Regulation No. 13 of 2017 concerning Public Order and Regional Regulation No. 20 of 2015 concerning the Spatial Plan of Sintang Regency which refers to the Regulation of the Minister of Public Works and Public Housing Number: 28/PRT/M/20I5 of 2015 concerning Determination of River and Lake Border Lines. This misalignment has implications for the issuance of building approval permits (PBG). This research is a qualitative study. This research describes the implementation of building policies in the Melawi River border area in Sintang based on facts from existing conditions in the field and from Sintang District Government documents related to the policy of controlling and managing the Melawi River border area in Sintang. This research was conducted in the Melawi River border area in Sintang Regency, West Kalimantan Province with research subjects in the form of Sintang Regency Government documents related to the development of the Melawi River border area in Sintang . The policy implementation model that researchers use in this study is the Direct and Indirect Impact on Implementation developed by George C. Edward III. The implementation of the building policy in the Melawi River border area in Sintang, in the researcher's conclusion, is not in accordance with the Local Regulation on Public Order and the Local Regulation on Spatial Planning of Sintang Regency and PERMENPUPR Number: 28/PRT/M /20I5 of 2015 concerning Determination of River and Lake Border Lines. This non-conformity has implications for the inability to issue Building Approval Permits (PBG) along the Melawi River boundary line area in Sintang.