This article is part of the research program on conceptualization of access of the interdisciplinary team "Social Participation and Inclusive Cities". A critical analysis of the concept Universal Accessibility is made. A clarification of its components makes it more understandable on a utopian horizon. Considering related concepts of Universal Design, Design for All, Contributive Design and Inclusive Access lead to an articulation of these concepts in an iterative planning process. It integrates four objective dimensions of access, the potential adaptability as a component of accessibility, the specific individualized accommodation, and finally the subjective dimension of usability, all applicable to any design project. Following a literature review, this critical work was realized in a qualitative participative methodology with researchers, students, clinical and community partners in the field of Disability. This study responds to expressed expectations by community, clinical and municipal partners in the research team. It valorizes the addition of social and subjective dimensions of access to the standard conformity to norms. This is an opening towards harmonization of transformative actions on physical and social obstacles into facilitators of social participation of people with disabilities and it contributes to the assessment of their impacts.