Analysis of the condition of Spain’s building stock and comparison among autonomous communities using data from the e-LEEx tool
DOI:
https://doi.org/10.20868/ade.2026.5728Keywords:
building renovation, LEEx, energy efficiency, conservation, dataAbstract
The Existing Building Logbook for renovation (LEEx) provides a structured assessment of the conservation, accessibility and energy performance of the building stock. This study analyses data generated by the e-LEEx platform, developed by the Professional Associations of Technical Architecture and Architecture of Aragon. After data cleaning, 4,201 buildings from different Spanish autonomous communities were examined, together with specific analyses by city and postal code in Zaragoza. The results show that 25.42% of the buildings have an unfavourable conservation status and 39.98% present serious accessibility deficiencies. Building age displays a moderate and statistically significant correlation with the percentage of buildings in an unfavourable condition, although it does not fully explain territorial variability. The renovation proposals included in the LEEx records estimate an average reduction of 47.63% in non-renewable energy consumption. The study demonstrates the value of structured building data for identifying territorial inequalities and supporting more precise renovation policies adapted to the specific conditions of each autonomous community.
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