Analysing Energy Efficiency Opportunities in Germany's Public Building Stock

Germany's public building stock stands at a critical juncture. Article 6 of the recast EU Energy Efficiency Directive (EED) strengthens the exemplary role of the public sector in building renovation, extending obligations beyond central government to all public bodies at federal, state and municipal level. With an estimated floor area of over 300 million square metres potentially in scope, the scale of the renovation challenge is considerable. Yet Germany has not established the public building inventory required under the Directive, and the legislative process for its national implementation of EED Article 6 remains ongoing.

Denmark, by contrast, has long been a pioneer in public building decarbonisation. The country has operated a mandatory energy certification scheme since 1997, with data collected in a central national building database that provides a robust foundation for tracking and steering renovation activity across the public building stock. This combination of data infrastructure and institutional clarity positions Denmark as a reference model for how the public sector can fulfil its exemplary role under EU law.

Against this backdrop, and given the long-standing strengths of Danish firms in heating systems, building insulation, digital energy management, ventilation and district heating solutions, the Trade Council of the Ministry of Foreign Affairs of Denmark, represented by the Royal Danish Embassy in Berlin and the Royal Danish Consulate General in Hamburg, commissioned adelphi to carry out a structured market analysis of energy efficiency opportunities in German public buildings. The study serves two complementary objectives: providing Danish energy efficiency companies with the market intelligence needed to identify the most promising segments and engagement strategies in the German public building sector, and supporting knowledge exchange between German and Danish public sector stakeholders on EED Article 6 implementation.

At the heart of the analysis is a quantitative estimation of energy efficiency potential across the full spectrum of public building sub-sectors, from schools and kindergartens to administrative buildings, universities, hospitals and cultural facilities, producing bottom-up estimates of renovation needs, investment volumes and energy savings potential by building type and governance level. These results feed into a structured benchmarking to identify the sub-sectors offering the greatest opportunities for Danish energy efficiency solutions. The quantitative analysis is complemented by a mapping of key institutional actors, funding programmes and incentive structures, as well as a dedicated comparison of German and Danish approaches to EED Article 6 implementation, informing policy recommendations for the German public sector.

The project will deliver a comprehensive market analysis report for publication, providing actionable strategic recommendations for Danish companies and the Danish missions in Germany. Findings will be presented to the contracting authorities, Danish and German business associations and sector stakeholders, as well as German public sector decision-makers and municipal actors, including at a conference on smart energy management in municipal buildings in November 2026.