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Understanding the decision-making of German small private landlords in terms of energy efficiency investment

Policy evaluation is widely considered important for assessing policies for effectiveness and impact. Municipalities are among the political actors implementing energy and climate policy. Yet, few municipalities have introduced adequate instruments to monitor the effectiveness of their actions. Often, municipal actors consider local greenhouse gas inventories to be sufficient to monitor the impact of their actions. This paper points out why the expectations placed on local greenhouse gas inventories as a monitoring instrument can rarely be met in practice.Based on German examples, it shall be shown that a thorough calculation of actual local energy and greenhouse gas reductions attributable to local efforts is often only partially possible, and is complicated by external factors.A supplementary approach to the top-down method is to evaluate local programs from the bottom up. This paper discusses efforts to develop an instrument for a bottom up monitoring of the city of Hamburg's Climate Action Plan.