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Drivers of Thermal Retrofit Decisions: A Survey of German Single- and Two-Family Houses

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Aleksandra Novikova, Ferdinand Vieider, Karsten Neuhoff, Hermann Amecke

Berlin: CPI ; DIW, 2011, 14 S.
(CPI Report)


The German government is committed to reducing the primary energy demand of buildings by 80% by 2050. This requires increasing the rate of thermal retrofits from the current 0.8% to 2.0% per year. To explore how new and existing policies and programs could deliver the increased retrofit rate, this paper examines the thermal efficiency retrofit decision-making process among owners of single- and two-family homes. It is based on a survey of 2,000 households that have been divided into three categories based on where they were in the retrofit decision process: 1. Households that have neither implemented nor are planning a retrofit; 2. Households that are planning a retrofit within the next two years; and 3. Households that have implemented a retrofit within the last five years.

Karsten Neuhoff

Head of Department in the Climate Policy Department

JEL-Classification: D80;Q40;L74
Keywords: Buildings, energy efficiency, thermal retrofit
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