Five years ago, Berliners voted to expropriate large landlords owning more than 3,000 units. The Senate ignored the non-binding referendum. Since then, new lease costs have risen roughly 50%. Now the socialist Left Party, which campaigned on delivering the expropriation, has won the largest vote share in the September 20 Berlin elections. Whether coalition negotiations produce action remains an open question, but the political signal is unmistakable: Europe's housing crisis has moved from policy complaint to electoral mandate. The article surveys five models already in operation. Vienna's is the oldest and most ambitious: the city owns approximately 220,000 municipal apartments and subsidizes another 200,000 dwellings, meaning over 60% of residents live in publicly controlled housing. This mass of public stock acts as a price anchor for the entire private market — landlords cannot gouge when the tenant's alternative is a city-owned flat at regulated rent. Basel decouples rent from land speculation by leasing public land to cooperatives and socially-conscious developers rather than selling it. About 40% of cooperative housing sits on public land. Barcelona and Lisbon are adopting variants of the same approach. Paris, facing a market where land and buildings are overwhelmingly private, uses a municipal "first right of refusal" in gentrifying neighborhoods, targeting 30% social housing for low-income residents by 2035. Sixty-one office-to-housing conversion projects could yield up to 8,200 new homes in Paris's inner suburbs. Prague targets a specific failure mode: the city cannot function without caregivers, police officers, teachers, and sanitation workers who cannot afford to live there. Some 660 new energy-efficient apartments have been built and reserved for public-sector employees, with rents 20% below market rate. Crucially, hospitals and agencies — not the bank that financed construction — choose the tenants. Dublin's Cost Rental Housing program, launched in 2021, addresses the gap between those who qualify for public housing and those who can survive the private market. Households earning below €66,000 net qualify. Non-profits and public agencies lease apartments at rents averaging nearly 30% below market. The government targets 18,000 low-cost rental homes by decade's end. The demand signal is stark: 4,200 applicants competed for 104 apartments in one suburban Dublin development last year. Each model attacks a different link in the extraction chain. Vienna socializes ownership. Basel socializes land. Paris asserts municipal purchasing power. Prague ring-fences essential workers. Dublin subsidizes the squeezed middle. None is a silver bullet, and all face the same headwind: financialized capital moves faster than municipal construction. Foreign investors buying Irish real estate during the post-2008 fire sale, tech companies inflating Dublin rents through favorable tax arbitrage — these are not problems a 660-unit development can outrun. The Berlin election is the political capstone. If expropriation legislation actually passes in Germany's largest city, it would be the most aggressive intervention in private property rights in a major EU capital in decades. The models surveyed here are gentler alternatives. Their collective lesson is that housing affordability requires permanent structural intervention — not one-off subsidies — because the forces driving extraction are permanent too.
