As the result of intensive urbanization and construction activities, cultural historical environments are facing with the threats such as abondonment and deterrioration. In this context, traditional housing areas are the mostly effected areas in the urban fabric. One of the most important responsibility of the communities is the preservation of natural & cultural values of traditional settlements as well as their memorial & symbolic values. So, planning and design processes must be based on ecological basis, and nature friendly approaches should be adopted to ensure the sustainable urban development as far as spatial and sociocultural factors are concerned. Traditional/vernacular architecture of the region was shaped due to environmental factors and echological data throughout history which carries all the requirements of energy efficent ecological design. The most important reasons why settlements belonging to historical religions reached today is the formation of the buildings by using local material by using environmental sources efficiently. Ağırnas which is a sub settlement of Kayseri that is located on the east of the city centre is dating back to 3000 B.C. Ağırnas which was declared as an urban site that has to be conserved has been a settlement of various civilizations and cultures throught history which is characterized by its traitional stone masonary houses. Societies that have lived in Ağırnas through history have built their monumental buildings and houses using natural stone and timber with appropriate techniques and structural systems. In this declaration, Ağırnas will be introduced with it’s natural and cultural qualities, landscaping features and urban characteristics. Then, housing areas & houses of Ağırnas are going to be evaluated in the frame of ecological design criteria. Besides, proposals for the sustainability of the ecological, spatial and socio cultural values of the local character & the settlement is offered.