This paper presents a case study that allows for a critical examination of the assessment of heritage values in the context of the historic urban landscape of Tunis. The case study reviews a pre-existing inventory, a partnership project undertaken by a civil society organisation: Edifices & Mémoires (E&M), and a professional organisation: the Order of the Architects of Tunisia (OAT), to develop a comprehensive inventory of buildings. The objectives of this paper are two-fold: first, to document the outputs obtained from the inventory, and second, to contribute to expanding existing theoretical frameworks in heritage assessment by discussing the perception of a civil society organisation and a professional organisation regarding the heritage values inherent in this historical urban fabric. It recognises that assessments of these organisations may differ from those who are not part of this kind of organisation. By examining this example of inventory, the research enriches ongoing conversations about heritage assessment approaches, fostering a more inclusive understanding of the nineteenth- and twentieth-century cultural heritage in Tunis. Recognising these divergent perspectives in the assessment of heritage values, the study highlights the importance of an inclusive approach to heritage recognition, contributing to safeguarding the cultural legacy of the historic urban landscape of Tunis.