THE IMPACT OF TRADITIONAL HOUSING TYPOLOGY ON NEW HOUSING DESIGNS IN EXISTING ENVIRONMENT: CASE STUDY IN AKCAKOCA Deniz Tuzcuoğlu Yıldız Technical University Keywords: Housing Design, Typology, Traditional Housing, New Design, Spatial Organisation Abstract. Introduction: Climate, livelihood, regional characteristics and etc. of an area has a significant impact for new housing desings in existing environment. This paper focuses on the information of the housing typology in existing areas by studying the traditional and the new type of housing plans to reveal the impact of traditional typology on the new housing plan types. Developments: It is discussed the relations between traditional housing typology and new housing designs in Akcakoca a district of Düzce, Turkey. In the case study, 13 houses has been selected on Doruk and Aydoğan street in Osmaniye Neighbourhood (5 traditional housing design, 4 new housing design with reference of traditional typology and 4 new housing design with no reference) Three different housing typology had been identified by subjective and objective measurement relevant to this study. Remarks and Conclusion: According to study results, it is concluded that there occur inadequate user satisfaction and func- tional efficiency in the examples of new housing design with no reference of traditional building scale and typology. On the contrary, in the examples of new housing design with the reference of traditional building typology has higher user satisfaction and comes up to expectations. As a re- sult, the housing designs with the reference of traditional building typology and building scale in existing environment provide more functional efficiency and higher user satisfaction.