The demographic, political, social and economic evolution of the last 40 years has shown how difficult it has been for the residential architecture of the 1960s to adapt to the needs of the turn of the century, in many cases suffering abandonment by the administration and the citizens themselves. However, these architectural ensembles, grouped together in the so-called “barriadas” (neighbourhoods), represented a change of era and a conceptual transformation in the way the city was built. This has led various international organisations to consider the need to study and protect them. The El Plantinar neighbourhood, located in the city of Seville, is one of these architectural complexes that are in a situation of vulnerability. The aim of this article is to propose a research methodology that, from different scales and with the incorporation of new players, allows us to understand these modern assets in their maximum dimension and to define their unique heritage. The methodology is structured in two phases. In the first phase, a general study of the neighbourhood is carried out on three scales: urban, object-typological and perceptive. In the second phase, the cultural attributes of the urban ensemble, of a patrimonial nature to which values can be assigned, are identified. The results provide very heterogeneous attributes that contribute to enrich the neighbourhood beyond the traditional scientific-technical and objectual vision that accompanies the assets of the modern period. The conclusions indicate that a methodology that takes into account different approaches and scales is necessary to incorporate these neighbourhoods solidly into the heritage landscape.