(de-news.net) – As Berlin’s coalition talks revive plans to transfer around 160,000 homes into public ownership, Germany’s Federal Government faces mounting pressure to regulate the socialization of private housing. The Investment Protection Act proposed by Interior Minister Alexander Dobrindt (CSU) would impose stricter expropriation requirements, including proof of necessity and compensation at full market value. While supporters argue that the legislation has a constitutional basis and property-sector representatives warn that prolonged uncertainty could deter investment, increase financing costs and worsen housing shortages, SPD politicians and legal scholars question whether the proposed restrictions would withstand constitutional review.

Germany’s Federal Government is facing growing pressure to introduce legislation restricting the socialization of privately owned housing, as the debate over Berlin’s plans exposes competing concerns about property rights, constitutional authority and the supply of affordable homes. The CDU Economic Council has called for the legislation to be adopted without delay. Wolfgang Steiger, the council’s secretary-general, backed Interior Minister Alexander Dobrindt’s proposed Investment Protection Act, arguing that private property must remain protected from political interference because it forms the foundation of Germany’s economic system. Even if the planned restrictions ultimately withstand constitutional scrutiny, Steiger warned, prolonged uncertainty could damage the country’s reputation among domestic and international investors.

Dobrindt outlined the principal elements of the proposed legislation on Sunday. Under the plan, state governments seeking to socialize residential property would have to demonstrate a compelling necessity and establish that alternative measures, including new construction and housing subsidies, had been exhausted without achieving their objectives. Any expropriation would require prompt monetary compensation at full market value, determined through an independent appraisal. The proposal follows an agreement by the federal coalition of the SPD, the CDU and the CSU to establish nationwide rules governing the limits of state-level socialization legislation. However, the Government has so far presented only the main policy principles, rather than a formal bill. The timing and final legal provisions therefore remain unresolved.

Berlin’s housing plans face potential legal obstacles

The proposed federal restrictions could complicate efforts by Berlin’s Left Party, Greens and SPD to transfer approximately 160,000 apartments owned by large private real estate companies into public ownership. Under the three parties’ exploratory agreement, private companies holding at least 10,000 apartments in the capital would be subject to the proposed measure. The parties intend to introduce legislation by mid-2028 and have proposed limiting total compensation to 16 billion euros.

The Left Party argues that expanding municipal ownership could help contain rent increases across the wider housing market. Its representatives point to the moderating effect of publicly owned housing on rental prices as a reason to bring large private portfolios under public control. Eralp, the party’s leading candidate in Berlin, has said that five companies, including Vonovia, would be affected by the plan.

The initiative has become a central issue in the parties’ coalition negotiations, placing their housing policy in potential conflict with the Federal Government’s proposed investment protections. The dispute also raises broader questions about whether changing ownership structures can address affordability without discouraging investment in additional housing.

Vonovia and property-sector stakeholders warn of investment risks

Vonovia has argued that the proposed socialization would be unconstitutional and would not withstand judicial review. The company maintains that Germany’s housing shortage can be addressed only through substantial private investment supported by predictable regulation, legal certainty and a stable investment environment. Within its Berlin portfolio, the average rent is 8.26 euros per square meter. Vonovia has also reported that approximately 1,000 residential units are under construction. The company’s position reflects broader concerns within the real estate industry that uncertainty over property rights could undermine investor confidence and make it more difficult to finance new housing.

The debate extends beyond the companies directly affected by the Berlin proposal. Real estate developers, lenders and construction businesses also depend on a predictable legal framework when committing capital to projects that may take years to complete. Industry representatives argue that uncertainty surrounding ownership rights could influence investment decisions even before any legislation is enacted.

Former Justice Minister calls for faster legislation

Marco Buschmann, a Free Democratic Party (FDP) politician and former Federal Justice Minister, has also urged the Federal Government to submit the promised legislation promptly. He maintains that the Basic Law provides a constitutional basis for federal rules governing socialization and potentially permits restrictions on the transfer of housing into public ownership. In his assessment, a dedicated group of officials could prepare a legally sound proposal within a few months.

Buschmann has separately questioned the constitutionality of Berlin’s plans, particularly the proposed compensation arrangements. He argues that compensation falling below half of a property’s market value would raise serious constitutional concerns. He has also challenged the criteria used to determine which housing companies would be affected, noting that the threshold has shifted during the political debate. In Buschmann’s view, the changing definition of a large housing company could raise questions under Article 3 of the Basic Law, which establishes the principle of equal treatment. The concern centers on whether companies in comparable circumstances could be treated differently according to a threshold that lacks a consistent justification.

Banks warn that financing could become more expensive

The Association of German Pfandbrief Banks (VDP), which represents approximately 50 real estate financiers, has warned that Berlin’s proposed socialization could deepen the housing shortage while increasing borrowing costs for households and property companies. Jens Tolckmitt, the association’s chief executive, argues that transferring existing apartments into public ownership would not create additional housing and could instead discourage the private investment needed to expand supply. He has also raised concerns about proposals associated with the Deutsche Wohnen & Co. Enteignen campaign to eliminate existing land charges without compensation, warning that such a change could undermine the collateral used in mortgage lending.

Land charges are an important component of property-backed financing. If lenders could no longer rely on established collateral arrangements, banks might reassess the risks associated with residential construction and home loans. Tolckmitt argues that the resulting uncertainty could make financing more expensive for both housing companies and private households seeking to purchase homes. He has called on the Federal Government to resolve the legal questions quickly, warning that a prolonged debate could weaken Germany’s reputation as a dependable destination for investment. The concern is not limited to the immediate financial consequences of socialization but also encompasses the credibility of the country’s legal and economic framework.

Atradius identifies additional risks for construction and real estate

Credit insurer Atradius has similarly identified the debate as an additional source of risk for Berlin’s property and construction industries. David Engelhardt, a manager in the company’s risk services division, argues that transferring existing housing into public ownership would alter the distribution of ownership without directly addressing the shortage of available homes.

Political uncertainty could also discourage developers and lenders at a time when construction activity is already constrained by high building costs, elevated interest rates, labor shortages, lengthy planning procedures and regulatory requirements. These pressures have made it more difficult for companies to bring projects to completion and secure the financing needed to expand residential supply.

For Atradius, the issue is therefore part of a wider assessment of the conditions affecting investment and credit risk in the construction sector. Uncertainty over property rights could compound existing financial pressures, particularly for businesses that rely on long-term projects and stable relationships with lenders, contractors and suppliers.

Housing completion figures underline the supply challenge

Germany’s housing statistics illustrate the difficulties facing the construction industry. Although 238,500 building permits were issued in 2025, only 206,600 homes were completed, the lowest annual completion figure since 2012. The number of completed homes is expected to decline further to approximately 185,000 this year, remaining substantially below the Federal Government’s longstanding target of 400,000 new homes annually.

The gap between permits and completed homes also reflects the time required to move projects through the construction process. Since 2020, the average period between approval and completion has increased by approximately seven months, reaching about 27 months. At the end of 2025, roughly 760,700 approved homes remained unfinished.

Atradius expects this backlog to persist as household numbers increase and new construction remains subdued. The figures highlight the distinction between approving housing projects and delivering homes that can actually be occupied. Even when projects have received permission, financial and administrative obstacles can delay completion.

The shortfall has been attributed to rising construction costs, expensive financing, shortages of skilled workers, extended planning procedures and complex administrative requirements. Atradius has emphasized the need for more predictable planning and investment conditions, alongside simpler construction processes, to make it easier to deliver housing at lower cost.

Construction insolvencies add to concerns about financial stability

Atradius is monitoring credit risks across the construction sector, including claims held by contractors, tradespeople and building-material suppliers against their customers. Demand for surety insurance and guarantees also remains high as businesses seek to protect liquidity and replace withheld security payments.

Engelhardt has reported an increase in losses associated with construction-sector insolvencies, suggesting that financial distress is affecting increasingly large companies. In this environment, uncertainty surrounding housing policy could have consequences beyond individual property owners and developers.

Delayed projects, payment defaults and further insolvencies could affect businesses throughout construction supply chains. Atradius therefore considers the reliability of the legal framework an important factor in maintaining confidence among investors, lenders and commercial partners. The company has also pointed to broader pressure on the construction industry, alongside difficulties in retail and manufacturing, as evidence of the need to improve the conditions for building.

SPD leaders challenge Federal Government approach

Within the Federal Government, Justice Minister Stefanie Hubig (SPD) has expressed reservations about Dobrindt’s proposed legislation, stressing that its constitutional implications require careful consideration. Although she considers Berlin’s socialization plans misguided, she argues that the financial and legal consequences could make the approach an inefficient way to expand affordable housing. Compensating large property companies could require billions of euros, while legal disputes could leave the sector facing years of uncertainty. Hubig has argued that public resources would be better directed toward constructing affordable homes rather than financing transfers of existing properties into public ownership.

Hakan Demir, an SPD member of the Bundestag and the parliamentary group’s rapporteur on tenancy law, has raised more specific objections. He argues that Article 15 does not explicitly require compensation at full market value or establish an absolute last-resort test before socialization can occur. In his view, Dobrindt’s proposal would impose conditions that go beyond those specified in the constitutional provision. Demir has also questioned whether the Federal Government can rely on its concurrent legislative powers primarily to prevent state legislatures from introducing their own socialization laws. He maintains that such an approach could conflict with Federal Constitutional Court jurisprudence limiting the use of federal legislation to exclude state lawmakers from exercising their powers.

The dispute could ultimately be decided by the Federal Constitutional Court. Demir believes that the proposed restrictions risk being overturned, arguing that a constitutional amendment would be necessary if the Federal Government wanted to prohibit socialization outright. Such an amendment would require a two-thirds majority, which he says Dobrindt does not have.

Opposition to Dobrindt’s plans has also emerged within the SPD outside the Federal Government. Steffen Krach, the party’s leader in Berlin, has criticized the Federal Government’s approach as increasingly reactive and legally questionable. He argues that federal legislation cannot simply override constitutional provisions that provide a basis for socialization.

Left Party defends public ownership as a housing policy tool

Eralp has also described the proposed federal restrictions as unconstitutional, arguing that ordinary legislation cannot prohibit a measure contemplated by the Basic Law. She maintains that the initiative does not primarily protect investment but instead works against the interests of Berlin’s tenants. Luigi Pantisano, the Left Party’s federal co-chair, has defended the Berlin initiative on the grounds that housing should primarily serve the people who live in it rather than generate returns for investors. He has criticized Vonovia’s dividend payments while pointing to reports of tenants living in apartments affected by mold.

The Left Party’s position rests on the argument that public ownership can help restrain rents and strengthen the role of housing as a public service. Its critics, however, contend that transferring existing apartments would do little to increase the overall housing supply and could discourage the private investment required to build additional homes.

The competing arguments reflect different assessments of how best to address housing affordability: through changes in ownership and rental-market structure, or through increased construction supported by stable investment conditions. The debate has also exposed disagreement over the balance between public policy objectives and the constitutional protections afforded to private property.

Constitutional scholars question federal authority

Constitutional law scholar Joachim Wieland has raised a different concern about the federal proposal itself. He argues that the requirements outlined by Dobrindt could make socialization virtually impossible in practice, potentially undermining Article 15 of the Basic Law, which expressly provides for socialization under specified conditions.

Thorsten Kingreen, a professor of public, social and health law at the University of Regensburg, has expressed substantial doubts about the proposed Investment Protection Act. He considers the constitutional basis for the legislation uncertain and warns that a legal challenge could produce a ruling unfavorable even to those who oppose socialization.

Kingreen argues that the Federal Government would need to demonstrate why the issue requires uniform nationwide regulation before using its legislative powers to restrict state action. He questions whether the proposal meets that standard and raises concerns that it could function primarily as a mechanism for blocking state-level initiatives. He also maintains that a federal law cannot create a binding obstacle to state legislation simply by making the constitutional conditions for socialization more demanding. In his assessment, ordinary legislation cannot impose requirements stricter than those established by Article 15 of the Basic Law.

The disagreement reflects two distinct constitutional questions: whether Berlin’s proposed measures comply with the requirements governing socialization and whether the Federal Government can impose restrictions that effectively prevent states from exercising the powers provided for in the constitution. More broadly, the legal debate consequently centers on the limits of federal authority, the scope of constitutional protections for property and the conditions under which governments may transfer private assets into public ownership. Until the legislation is formally introduced and its provisions are examined, the precise legal boundaries will remain unsettled.

Housing supply and legal certainty remain central to the dispute

The controversy over Berlin’s proposed socialization has developed into a wider dispute about Germany’s housing policy and the relationship between constitutional rights, public ownership and private investment. Supporters of federal restrictions argue that predictable rules are essential to preserving confidence in the property market and financing additional construction. Proponents of socialization maintain that the Basic Law permits public ownership measures and that municipal housing can help moderate rents.

At the same time, the construction industry continues to face a substantial gap between the Government’s housing ambitions and the number of homes being completed. High costs, financing constraints, labor shortages and lengthy administrative procedures remain significant barriers, while the debate over socialization has introduced another source of uncertainty.

The outcome will depend in part on how the Federal Government translates its proposed safeguards into legislation and whether those provisions withstand constitutional review. The central question is whether the Government can establish nationwide investment protections without restricting state powers beyond the limits set by the Basic Law, while also addressing the underlying shortage of affordable housing.