The aims of this s tudy is to analyse the planning and design process, basic principles and the change-transformation process of the apartment type residential buildings in Turkey, Gaziantep city based on his torical background. The scope of the research consis ts of residential buildings built in the city of Gaziantep, which were built in the pos t-Republican period. In addition, s tate-building maps, zoning-city plans and plan disclosure reports, photographs and other materials are among the other materials. In this research, a method based on the spatial usage of the apartment buildings cons tructed in Gaziantep and the changes in the housing plan schemes and the spatial usage of these buildings and the changes in the housing plan schemes were followed. These changes are evaluated from the analysis of a series of variables ranging from parcel level to plan schemes, access graphs to spatial size and ratios. As a result of the s tudy, it was seen that the access graph and space sizes of the apartment-type residential buildings in the city of Gaziantep, which dates back to the 1960s, have changed. However, differences and variations are observed in the firs t plan typologies and it is noteworthy that this diversity is reduced and similar plan schemes are widely used.
