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Uncovering the financial impact of energy-efficient building characteristics with eXplainable artificial intelligence

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  • Konhäuser, Koray
  • Werner, Tim

Abstract

The urgency to combat climate change through decarbonization efforts is more crucial than ever. The global building sector is one of the primary contributors to carbon emissions, yet the economic implications of energetic building characteristics of residential buildings remain elusive. This study addresses the intersection of building energy performance, market valuation, and carbon emissions reduction by introducing a novel cluster-based eXplainable Artificial Intelligence (XAI) methodology to uncover the financial impact of energetic building features on property valuation. We combine Energy Performance Certificates (EPC) and property transaction data within the UK and apply two sophisticated machine learning models: XGBoost and CatBoost. To this end, we use hierarchical BIRCH clustering to identify subgroups within our comprehensive dataset and leverage SHapley Additive exPlanations (SHAP), Permutation Feature Importance (PFI), and Partial Dependency Plots (PDP) to reveal nuanced insights into the financial contribution of energetic building characteristics to property valuation. This research contributes to the academic discourse by introducing a cluster-based XAI approach for analyzing energy-related financial incentives in the building sector. Our results suggest that energy-efficient building features lead to significant financial benefits outside of London. The cluster-based approach reveals that carbon emissions are predominantly relevant for medium to large buildings outside of London but have a reversed financial effect within the capital. For larger residential buildings, we find a tendency for high running costs for energy (e.g., lighting costs) to be well reflected in transaction prices. The presented findings underscore the potential economic benefits for targeted energy efficiency improvements and illuminate the pathway towards a low-carbon society by addressing inherent uncertainties surrounding the economic viability of energetic investments, thus fostering informed decision-making and sustainable development.

Suggested Citation

  • Konhäuser, Koray & Werner, Tim, 2024. "Uncovering the financial impact of energy-efficient building characteristics with eXplainable artificial intelligence," Applied Energy, Elsevier, vol. 374(C).
    • Handle: RePEc:eee:appene:v:374:y:2024:i:c:s0306261924013436
    DOI: 10.1016/j.apenergy.2024.123960
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