This article explores thinking and practice regarding property at houses of canons from the mid-ninth to mid-eleventh centuries, through a case study of the charters of Saint-Hilaire-le-Grand in Poitiers. Since Late Antiquity, Christian orders debated the legitimacy of private property, with most rejecting it in favor of exclusively common holdings. For houses of canons, property became a defining issue in the Central Middle Ages: Carolingian legislation in 816 asserted that canons (unlike monks) could hold private property, while the order of regular canons, which emerged in the eleventh century, rejected it as corrupt. The role of property at houses of canons in the interim period, meanwhile, has been largely neglected by scholars. This essay argues that Saint-Hilaire embraced Carolingian acceptance of private property among canons, but that that stance did not preclude protection of joint property and interest in the common life. The resulting detailed understanding of both the quotidian functioning of property at a tenth-century house and the ideals that drove its regulation inform my concluding comments on two broader topics: the role of wealth and property in a dedicated religious life, and the nature of reform movements in the church of the Central Middle Ages.