The construction sector plays a crucial role in urban development, offering an op-portunity to foster a cultural shift towards housing stock regeneration. This shift em-phasizes sustainable and resilient urban interventions that extend building lifespans, beginning at the design phase. In this context, Level(s), the European Union's framework for sustainability indicators, is particularly relevant to our research, as it emphasizes circular economy principles and building resilience. It provides a comprehensive set of indicators to guide resilient housing rehabilitation methodologies. Indicator 2.3 supports the design and renovation of obsolete housing, focusing on maximizing resilience to climatic, functional, and socio-economic impacts. Indicator 4.2 assesses the comfort of building occupants regarding indoor thermal conditions throughout the year. Our research aims to develop a resilient housing rehabilitation methodology based on Level(s), which includes (i) assessing the current resilience of a pilot case, (ii) designing new resilient housing configurations, (iii) evaluating thermal comfort duration for older adults; and (iv) analyzing cost amortization. The research findings will contribute to a comprehensive, flexible, and accessible refurbishment model that is adaptable to diverse tenant needs while addressing thermal comfort and cost efficiency. Additionally, analyzing the metabolic energy index in older adults will inform better adaptations and revisions of comfort standards for vulnerable populations.