Teacher professional autonomy is important to teachers' work satisfaction, efficiency, well-being, and empowerment. However, it cannot simply be defined as freedom from control because it is relational and contextual. In this paper, we examine the relationality and contextual sensitivity of teacher professional autonomy at 'Newstall' College, a senior secondary government school in Australia. The paper draws on a larger study that examined the social justice implications of school autonomy reform in four Australian state education systems. Newstall College was one of the five case study schools included in this study. Findings generated through in-depth interviews with eighteen staff members (including teachers, professional staff, the deputy principal and the principal) are presented that examine teacher professional autonomy. Conceptualising teacher autonomy as relational and contextual, the paper provides insight into the ways in which teacher autonomy was enabled at this school.