A methodology for analysing the impact of contemporary transformation processes in vernacular built environments

Abstract Vernacular built heritage, which is rich in cultural knowledge and identity, is increasingly threatened by modernisation. The absence of specific assessment tools, however, prevents a thorough evaluation of this impact. To address this gap, this paper presents a methodology for assessing how contemporary transformation processes affect the built heritage of vernacular settlements facing abandonment. This methodology involves inventorying the buildings of a vernacular settlement to identify alterations that significantly impact their vernacular character. Each building is assigned an index value quantifying the impact of these alterations. This process is facilitated by a multicriteria decision-making (MCDM) approach that incorporates the combined judgement and expertise of stakeholders typically involved in site management. The results yield an index that quantifies the preserved vernacular character of a site. Designed to be adaptable to diverse cultural contexts and situations, this methodology was implemented in thirteen vernacular villages within Montesinho Natural Park (MNP), Portugal, where buildings undergo continuous substitution, modification, and abandonment. This research offers policy-makers and site managers a replicable model for developing management strategies that can help safeguard and revitalise these unique heritage assets. This research hypothesises that enhancing vernacular building practices can reverse depopulation by fostering dynamic community engagement.