This paper seeks to identify how users and architects through collaborations are generating knowledge on Universal Design (UD). Besides the need for architects to build a solid foundation of architectural knowledge, insight in users’ life practices is essential in UD knowledge creation. Users’ experience and perception of space offers a qualitative alternative to quantitative notions of space. Through thirty-two interviews, the paper contributes with a qualitative perspective on collaborative practice between users and architects. An unfolding of knowledge creation shows that accessibility as quantifiable measurements, seems to have taken root in collaborative prac-tice, while knowledge on UD is still sprouting. The research also shows that interpretations of ac-cessibility, as compensating solutions for a few, has an impact on both collaborations, knowledge creation, and architecture. Hence, increasing awareness of greater collective responsibility of in-clusion and movement towards concepts such as UD and Inclusive Architecture, challenges ar-chitectural practices when expected to align with societal movements. If human diversity and architectural practice are to meet in UD ideals, advanced user-based knowledge, and awareness of social aspects of architecture, in line with legislation and technical insight, is suggested. In creation of space that are inclusive, and which increase possibilities for more, architects must seek nuanced knowledge of users and insight associated with their daily practice. The research point to, how UD knowledge, is created and put into action is crucial, to whether architectural design processes can respond to societal ambitions and international conventions.