In this article an attempt is made to put forward a convincing case for giving substantive content to the right of access to adequate housing and looks towards relevant international law elaborations on the meaning of this right as contained in the International Convention on Economic, Social and Cultural Rights (ICESCR). It does so while being aware of the Constitutional Court's prior rejection of an international law-based minimum core interpretation of the right and opting, instead, for the so-called model of reasonableness review. Given that the court has so expressly taken and stuck to this stance, it is argued in the article that an international law-based substantive interpretation of the right is possible - given that South Africa has recently ratified the ICESCR - and that it is preferable given the shortfalls of the model of reasonableness review. The article further highlights what difference the preferred reading of section 26(1) would make as to how courts 'interpret' reasonableness, that is, how courts review compliance with section 26 at present if 'adequate' housing is understood as having security of tenure and access to basic municipal services; is affordable, habitable and accessible; is located in close proximity to social facilities; and is culturally adequate.