This paper offers an expanded conceptualization of inclusive design philosophy in the built environment by mapping some of the key literature in the last two decades. Grounded on fundamental concepts of equity, accessibility, and diversity, inclusivity emphasizes providing equal opportunities for the broadest possible audience while accounting for differences. Despite the shared universal aspirations, conceptual ambiguities surrounding inclusivity persist across various spatial studies. Literature mapping on the inclusivity of the built environment through main themes and approaches reveals a shift from early inquiries into the environments’ disabling physical characteristics toward an expanded epistemological ground constructed on users' socio-spatial experiences and engagement. In response, the paper articulates a conceptual framework for understanding the experiential dimension of inclusivity based on agency and participation through a new materialist perspective.