The study proposes and compares low-cost strategies to improve the quality of existing building stocks,with special regard to a widespread Indian residential typology. A dynamic energy model of this particularlocal building typology was simulated with Energy Plus software and validated by comparing it with someoriginal in situ measures, recorded by hourly step. The validated model was used to simulate a selectionof low-cost and technically simple interventions, whose effects on the energy performance and indoorcomfort were compared to the baseline case study. Comfort performances have been evaluated usingcomfort indoor degree hours (CIDH) and the TSI index. A combination of the most effective solutions wasproposed and simulated. The results were used to assess possible improvements of comfort (reductionof CIDH) and savings of energy consumption (referred to an A/C scenario). Finally, the role of occupants’behaviour was further investigated.