This chapter examines the practical provision of affordable housing, in terms of the mechanisms by which it is achieved, the barriers towards its provision and the changing relationship between provision on S106 and non-S106 sites. It thus addresses the issue of whether S106 is making life easier or harder for social landlords in the provision of additional affordable housing. Drawing on our research, the chapter explores whether S106 makes land cheaper for HAs or cheaper across the board. It concludes with a discussion of whether provision via S106 is helping to meet secondary governmental objectives, in particular the creation of mixed and sustainable communities.