This thesis explores how gentrification and the growth of gated communities interact to reshape socio-spatial inequality in Tehran. Rather than treating these two processes as separate phenomena, the research argues that they are closely connected and together contribute to new forms of self-segregation, exclusion, and uneven access to the city. Tehran has experienced rapid urban change over recent decades, driven by population growth, economic instability, real-estate speculation, and planning policies that often prioritise land value and private investment. In this context, older neighbourhoods have undergone gradual upgrading and commercial transformation, while high-income groups have increasingly turned to gated residential developments that promise security, privacy, and lifestyle distinction.