This study was conducted to evaluate conservation activities regarding conservation council decisions in a middle sized, but touristic historic city on western coast of Turkey. The aim of the study is to evaluate the impact of the current conservation plan and conservation council decisions on the immovable cultural assets in listed urban site of Kuşadası. The methodology includes literature research, archive research in Conservation Council, Pious Foundations and Kuşadası Municipality, site survey comprehending base map correction and photographic documentation; visual analysis, historical research and comparative study, and evaluation of conservation activities with reference to concepts of authenticity and integrity. It is evaluated that there are conservation problems originated from inappropriate conservation implementations ignoring the concept of authenticity and integrity of immovable cultural assets. There is also terminologic confusion in some conservation council decisions. Majority of the conservation implementations have focused on single building scale. Unlicensed constructions stemming from insufficient control of the Municipality in the historic urban environment and lack of implementation of the conservation plan in terms of removal of inharmonious buildings and masses are significant in terms of their negative impact on integrity of the urban layout. Preparation of a management plan, revision of the conservation plan, which dates to 1994, and determination in their application are considered as indispensible for sustaining of authenticity and integrity.