ABSTRACT: Effects of engineering works on the natural system during urbanization on a coastal plain, and effectsof geological processes on a city are the research areas of engineering geology discipline. Coastal plainsare under effect of natural processes such as flood, coastal erosion, earthquake, sediment accumulationand groundwater level change. In this study, engineering geological issues which should be considered fora coastal plain were examined for Boğaçay coastal plain (Antalya) case. Geology of the plain was defined,engineering properties of the geological units were explained, natural processes which may affectresidential areas were determined, residential facilities were examined in accordance with the naturalconditions, and solutions were recommended for the purpose of land-use. Boğaçay coastal plain is one ofthe most attractive region of Antalya for its touristic, natural, agricultural, and economical values. Somefoundation problems were encountered on buildings constructed on the plain. Soil profile in lagoonal deposits is complex. Allowance of high rise buildings and engineering mistakes are the other problems.The plain is located in the middle of three active fault zones. Due to the existence of very thick and soft soilnear the surface, the earthquake intensities will be greater on the soil surface as compared to rock thestrata lying at greater depths. Sand, gravel and rock quarries in the area destroyed the nature and causedsome environmental problems. Excessive quarrying has resulted in reduction of sediment supply toKonyaaltı beach and thus promoting coastal erosion. There is high flood risk on the plain due to theexistence of steep topography and high rainfall rates in the surrounding area. Based on engineeringgeological criteria, it is required to revise the current urban plans due to problems of the existingresidential plans and high risk for densely populated areas.