Germany’s interior ministry puts forward plan to block housing socialisation in Berlin

The proposed Investment Protection Act is designed to limit Berlin’s ability to transfer privately owned housing into public ownership. It would leave socialisation legally possible, but add demanding conditions. The federal government’s apparent aim is to make Berlin’s plan too costly or legally difficult to carry out.

Berlin would first need to prove a compelling need for socialisation. It would also need to show that alternatives, such as investing in and subsidising new homes, had been exhausted. Property owners would then receive compensation calculated by an expert at full market value, paid immediately in cash.

That approach could block Berlin’s plan in practice. The prospective coalition has considered up to €16 billion in compensation, based on payments below market value. Full market-value payments could exceed the city’s ability to finance the scheme. The Federal Constitutional Court could ultimately examine whether either side’s legal position complies with the Basic Law.

The three parties are considering socialisation as part of a preliminary proposal for a possible Berlin state coalition. The plan targets about 160,000 flats owned by large property companies. Socialisation would transfer those homes into public ownership through legislation rather than using the legal route for individual expropriations.

The proposal focuses on companies with more than 10,000 flats. Berlin’s prospective coalition has discussed making up to €16 billion available to compensate those owners. It has also envisaged compensation below market value, which would make the plan less expensive than paying the full value of the properties.

The proposal remains politically and legally unsettled. The Left Party made socialisation a central pledge, while the SPD’s Berlin lead candidate campaigned against it. The SPD is therefore divided between its federal position, which supports an Investment Protection Act, and its preliminary Berlin coalition agreement with the Greens and Left Party.

The proposed socialisation scheme could affect roughly 160,000 flats owned by large property companies. The figure covers homes held by companies with more than 10,000 flats. Those properties would be transferred into public ownership under Berlin’s planned Article 15 approach.

Berlin’s prospective coalition has considered making up to €16 billion available to compensate the affected owners. That amount is linked to compensation below full market value. The coalition’s plan therefore differs sharply from Dobrindt’s proposal, which would require full market-value compensation calculated by an expert.

The numbers show why compensation is central to the dispute. Paying below market value could keep the scheme within a possible public budget, although the article does not establish whether €16 billion would be sufficient. Paying full value immediately in cash could make the plan prohibitively expensive. The final cost would depend on how compensation rules are legally defined and applied.

Requiring immediate cash payments at full market value would transform Berlin’s housing plan into a much more expensive project. The prospective coalition has considered up to €16 billion in compensation, with payments below market value. Full-value compensation could therefore require substantially more money than Berlin has planned.

The mechanism is straightforward. An expert would calculate the market value of the affected properties, and the city would have to pay that amount immediately in cash. Berlin could not spread the compensation over time under the proposal described in the article. That upfront requirement would create a major financial barrier.

As a result, the plan might remain legal in theory but become unworkable in practice. The article describes the scheme as potentially prohibitively expensive under those conditions. Its legality is also uncertain because Article 15 has never been used, while Constitutional Court review could test both Berlin’s socialisation plan and the federal restrictions.

Expropriation and socialisation are different legal tools under Germany’s Basic Law. Expropriation, or Enteignung, falls under Article 14. It withdraws particular property rights for a specific public-interest project. Building a road is the article’s example.

Socialisation, or Vergesellschaftung, falls under Article 15. It allows land, natural resources and means of production to be transferred into public ownership through legislation. Berlin’s prospective coalition says it would use this route for housing, rather than Article 14. The distinction matters because the two provisions address different kinds of state action.

Article 15 has never been used, so there is no settled case law on when it is permitted or how compensation should be calculated. Berlin cannot be sure its plan would survive a challenge. At the same time, the federal government cannot be sure that restrictions requiring full-value compensation would withstand constitutional scrutiny.

The Federal Constitutional Court would be the central institution for deciding whether the competing legal positions are constitutional. Berlin’s plan could face a challenge because Article 15 has never been used and lacks settled case law. The federal government’s proposed restrictions could also be challenged if they go beyond what the Basic Law permits.

Berlin’s prospective coalition would create the socialisation legislation, while the federal government and lawmakers would pursue the Investment Protection Act. Those political institutions would shape the rules, but they would not have the final word on constitutional validity. Constitutional law professor Ulrich Battis specifically questioned whether full market-value compensation fits the constitution.

The legal outcome is therefore uncertain. The article says Berlin cannot know whether its plan would withstand a challenge, and the federal government cannot know whether Dobrindt’s restrictions would survive scrutiny. The Federal Constitutional Court could ultimately clarify how Article 15 works and how compensation must be calculated.

Germany’s Basic Law protects private property but also recognises that property can serve wider public purposes. Article 15 allows land, natural resources and means of production to move into public ownership through legislation. The article presents this as a constitutional route for addressing public interests while still requiring lawmakers to follow legal conditions.

Berlin’s housing proposal illustrates the balance. The city would use Article 15 to bring about 160,000 flats owned by large property companies into public control. The federal proposal would protect owners through strict conditions, including full market-value compensation paid immediately in cash. These rules would limit the public authority’s power without removing socialisation from the constitution.

The balance remains unresolved because Article 15 has never been used. There is no settled case law explaining when socialisation is permissible or how compensation should be calculated. Berlin’s plan and the federal restrictions could both face review by the Federal Constitutional Court.