Cultural, environmental, and social assessment of buildings’ rehabilitation for urban regeneration strategies J. Mourão 1* , A. Psoma 2 1 Center for Innovation in Territory, Urbanism and Architecture, Technical Superior Institute, Lisbon University (CiTUA/IST) 2 Department of Architecture, National Technical University of Athens, NTUA, Greece *Corresponding author: E-mail: joana.mourao@tecnico.ulisboa.pt Tel +351 962423402 Abstract In recent years buildings in European cities are being submitted to rehabilitation or renovation works, envisioning new uses and to new functional, comfort and energy requirements, while also responding to market trends. These interventions on the inherited urban building stock have driven a nonstrategic urban regeneration, transforming urban housing in uncontrolled ways, compromising its cultural, environmental, and social value, in areas where urban tourism and shortages of housing are increasing. To support urban regeneration policies and to regulate interventions in urban buildings, according to cultural, environmental, and social sustainability principles, a process and a tool were created: REHURB_IMPACT multicriteria tool evaluates buildings and projects with a structured assessment with criteria and a scoring procedure, targeting the preservation of the built heritage with cultural value, the optimization of the consumption of materials and energy, and the supply of adequate and mixed housing. This process conducts and supports decision-making in urban housing rehabilitation, at the framework of three “urban regeneration” dimensions: technical-cultural; energy-environmental; and social-residential. REHURB_IMPACT multicriteria tool is structured by nine domains: urban morphology, architectural typology; construction system; materials, components, facilities, uses, habitat, and development (real estate). These domains are branched out in assessment criteria and elements. The tool uses qualifiers to evaluate the selected elements in terms of representativeness; adequacy; conservation; embodied energy; comfort and operational energy; adaptability and diversity. Elements are assessed through questions relating these qualifiers, resulting on a scoring to provide simple information about foreseen impacts. This paper describes REHURB_IMPACT multicriteria process and tool, with reference to a pilot application in a residential building in Portugal. This experimental tool pursues the improvement of the impacts from urban buildings’ rehabilitation, while supporting innovative urban regeneration strategies. Keywords: Urban Heritage, Buildings Rehabilitation, Cultural Value, Environmental efficiency, Adequate housing