The decision to rehabilitate Architectural Heritage (AH) in a sustainable way is complex, because the associated costs require different levels assessment, given their relevance to all stakeholders in decision-making, and are not always easily quantifiable. Following recent decisions of the EU, it is urgent to carry studies to support AH sustainable rehabilitation projects. In this context, the use of methodologies based on Cost-benefit analysis (CBA) contributes positively to base decisions on AH rehabilitation investment projects. CBA is a method to assess the net economic impact of a public investment project and can be used for a variety of interventions. CBA is based on the conversion to monetary values of all costs and benefits, even when they are intangible. The purpose of a CBA is to evaluate if a project is feasible from the point of view of social welfare through the algebraic sum of their costs and benefits discounted over time. This paper presents a proposal for socio-economic evaluation of AH sustainable rehabilitation projects based on CBA, which integrates the development of community policies and financial instruments. It aims to provide technical support and contribute to the reflection about co-financing rates modulation.
