Abstract: The weighting of indicators in the evaluation of historical building value is typically based on the relative importance of each indicator, often overlooking the influence of subjective scoring discrepancies on these weights. However, such differences in subjective scoring reflect the reliability of scoring data and the degree of emphasis placed on high-value indicators. Considering them as factors influencing indicator weighting can lead to more objective and accurate evaluation results. This study introduced the information content weighting method and the mandatory distribution method, building upon traditional weighting methods. On one hand, the information content weighting method assigned weights based on the consistency of expert scores for the same indicator, thus compensating for the oversight of considering discrepancies in expert scores for the same indicator in weighting. On the other hand, the mandatory distribution method optimized the weighting intervals based on the differences in scores between existing indicators, enhancing the rationality of determining interval boundary parameters. After simulating and validating the feasibility and superiority of these two methods, the study further demonstrated their practical significance using the examples of the Xucun Mansion Ancestral Hall in Shexian County and the Wu Family Branch Ancestral Hall, aiming to provide more reliable and effective guidance for the conservation of historical buildings through value assessment.