Multimodal Modular Chain of Thoughts in Energy Performance Certificate Assessment

• URL: http://arxiv.org/abs/2603.00115v1
• Date: Fri, 20 Feb 2026 14:46:01 GMT
• Title: Multimodal Modular Chain of Thoughts in Energy Performance Certificate Assessment
• Abstract summary: This paper presents a cost-efficient framework that leverages Vision-Language models for automated EPC pre-assessment from limited visual information.<n>Experiments on a multimodal dataset of 81 residential properties in the United Kingdom show that MMCoT achieves statistically significant improvements over instruction-only prompting.
• Score: 2.5501895454488666
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Accurate evaluation of building energy performance remains challenging in regions where scalable Energy Performance Certificate (EPC) assessments are unavailable. This paper presents a cost-efficient framework that leverages Vision-Language models for automated EPC pre-assessment from limited visual information. The proposed Multimodal Modular Chain of Thoughts (MMCoT) architecture decomposes EPC estimation into intermediate reasoning stages and explicitly propagates inferred attributes across tasks using structured prompting. Experiments on a multimodal dataset of 81 residential properties in the United Kingdom show that MMCoT achieves statistically significant improvements over instruction-only prompting for EPC estimation. Analysis based on accuracy, recall, mean absolute error, and confusion matrices indicate that the proposed approach captures the ordinal structure of EPC ratings, with most errors occurring between adjacent classes. These results suggest that modular prompt-based reasoning offers a promising direction for low-cost EPC pre-assessment in data-scarce settings.

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