The Post Occupancy Evaluation (POE) carried out by Metrovacesa and IREC offers valuable insight into occupant satisfaction by combining real-time indoor environmental monitoring with user feedback. Over 15 days in both summer and winter, sensors track temperature, humidity, and CO₂ levels in homes, while nearby weather stations provide external data. Occupants complete surveys assessing their perception of air quality, thermal, visual, and acoustic comfort. The results are then analysed to compare measured data with occupant experience, providing a clear picture of indoor environmental quality (IEQ). This approach not only validates the comfort performance of buildings—showing mostly high to medium comfort levels per European standards—but also empowers residents with personalised feedback and supports future improvements in sustainable, user-centered building design.