Although Universal Design gains popularity as a common sense strategy for crafting built environments for all users, accessibility for disabled people remains a marginal area of inquiry within design practice and theory. This article argues that the tension between accessibility and Universal Design stems from inadequate critical and historical attention to the concept of disability as it relates to discourses of “good design.” This article draws upon critical disability theory to reveal the persistence of “post-disability” narratives and “ideologies of ability” from the eugenics era into the present theory and practice of Universal Design.