Marne La Vallée

French cooperative housing today takes three forms, and the new town knows two of them. The oldest is the société coopérative d'HLM (a cooperative social landlord whose members include its tenants and buyers). Les Coop'HLM, their federation, counts 160 of them nationally. The newest is the bail réel solidaire, or BRS (a long lease under which a household buys the home while a land trust keeps the land and caps every resale price). The land trust is an organisme de foncier solidaire, or OFS (a non-profit body approved by the prefect to hold land permanently out of the market). The third form, the coopérative d'habitants (a residents' cooperative whose members collectively own the building and pay it a monthly fee), has champions such as Habicoop but no project yet in Marne-la-Vallée.

The history explains the gap. Cooperatives of the HBM era, the forerunner of HLM, had built 10,000 homes by 1928, and the Castors self-build movement put up 12,100 more between 1948 and 1952. Then laws in 1965 and 1971 barred cooperatives from renting homes to their members. Those are exactly the years in which the new town was drawn up. Its housing was delivered by the state agency, HLM landlords and private developers, and the cooperative form simply had no legal place in it until the 2014 ALUR law gave residents' cooperatives a statute again.

The sector that exists now clusters in three groups. The first is the cooperative HLM builders. Coopimmo and Expansiel Promotion were among the 11 HLM cooperatives that founded the region's first land trust in June 2017. The second is that trust itself, La Coop Foncière, part of a fast-growing national network. France had 188 OFS approvals by the end of 2024 and 2,119 homes under BRS a year earlier, according to the housing ministry's review of the scheme. The third group is citizens. In Noisy-le-Grand, the Mosaïque project is gathering a group for 43 homes, all under BRS, and aims for a third of its households to be over 55. It is listed by Habitat Participatif France, the national network of self-organised housing groups. The three groups share one constraint, the price of land. They differ in time horizons. An HLM cooperative can deliver on a developer's timetable, while a residents' group needs years to form before it can buy.

Organisation in focus

La Coop Foncière

Île-de-France's first land trust, founded by HLM cooperatives in 2017.

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From our library

Les organismes de foncier solidaire et le bail réel solidaire (2025)

Ministry review of land trusts and the BRS lease.

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The state is the swing actor. EpaMarne-EpaFrance (the state development agencies that own and sell most of the building land) now writes BRS quotas into its tenders. In Champs-sur-Marne, one 2025 lot of 123 homes must include 37 in BRS at a capped sale price. A lot in Villiers-sur-Marne asks for 25%. In a town where the state sells the land, cooperative ownership grows only as fast as the land contracts allow.

The national line in 2026 is supply first. Vincent Jeanbrun, Minister for Cities and Housing, calls the crisis the worst since the Second World War. His bill on relaunching and decentralising housing aims for 2 million new or renovated homes by 2030. It also carries a third national urban renewal programme for 2030 to 2040, worth €5 billion and run by ANRU (the national agency for urban renewal). The 2026 budget added a statut du bailleur privé (a tax status that lets private landlords depreciate new homes let below market rents). Social landlords want room to build too. Their union says the state levy on their rents still takes €900 million a year, while 2.9 million households wait for a social home across France.

Below the state, each level holds a different lever. The Île-de-France Region's master plan, the SDRIF-E, approved by decree in June 2025, asks the region for 70,000 homes a year, two-thirds of them affordable. The Region also stopped funding very-low-rent PLAI homes in communes already above 30% social housing, which its critics call a brake on social supply. The agglomerations write the local rules. Val d'Europe's short-term let regime is one. Its draft intercommunal plan targets 883 homes a year towards an eventual 80,000 inhabitants. Above them sits a private contract. The 1987 agreement between the state and Disney still governs Val d'Europe, and its 2020 amendment added 1,800 homes, plus 450 reserved for Disney employees.

Cooperative instruments come through the land. The BRS quotas in EpaMarne's tenders are the main one, and the Coopérative Foncière Francilienne is the vehicle that holds the land. Research on land policy instruments for social and affordable housing across Europe shows why this matters: public land banking lets an authority set the terms of what gets built. Marne-la-Vallée has had a public land bank for half a century. What is new is using it to keep homes out of the resale market for good, as land trusts across Europe do, according to the European sector report on community land trusts.

The answer to empty offices is legal as much as financial. A law of June 2025 lets mayors waive parts of the local plan to turn offices into homes, and allows a single permit to cover several successive uses. Val d'Europe goes further on its own patch. An owner who takes a flat off the market for tourists can be required to compensate by converting non-residential space, such as an office or a shop, into housing. A report for the European Commission on converting offices into affordable housing argues such conversions can emit far less carbon than demolition and rebuild. Housing Europe's policy menu for vacant homes stresses that such tools only work where vacancy is measured and enforced.

From our library

Conversion of offices into affordable housing

European Commission study on converting offices into affordable housing.

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Climate rules now shape every scheme. Homes rated G on France's energy performance certificate (the DPE) can no longer be newly let since 2025, F-rated homes follow in 2028 and E-rated homes in 2034. The 2021 climate and resilience law requires land take to be halved by 2031 and to reach zero net artificialisation (no net loss of natural land to building) by 2050. For a town that grew on farmland, that is a direct limit. EpaMarne has prescribed timber and bio-based materials in a third of its housing schemes since 2015, and around 50% of its 2021 housing used them. Housing Europe's study of climate adaptation in public, cooperative and social housing warns that older social estates, like the new town's 1970s blocks, carry the highest exposure to heat.

The Cité Menier in Noisiel came a century before the new town. The chocolate maker Menier began building it in 1874, and more than 300 brick houses eventually stood on some 20 hectares beside the factory. It was the area's first planned housing: built for workers, owned by their employer, and still lived in today.

Les Espaces d'Abraxas is the new town's most famous housing. Ricardo Bofill designed about 590 homes in three monumental blocks in Noisy-le-Grand, completed in 1983, and cinema made them a dystopian backdrop. The Palacio alone holds 441 homes, 329 of them social, managed by CDC Habitat (the social-housing arm of the state bank). After years of debate and an abandoned attempt at demolition, a retrofit worth about €16 million is under way and runs until 2027. Across the square, Manuel Núñez Yanowsky's Arènes de Picasso gathers 540 homes in two giant discs, locally known as the camemberts.

La Noiseraie, by Henri Ciriani, shows the tension between heritage and climate. Only 300 of the 900 planned homes were built, for the social landlord now called 3F. In 2019 the architect used his moral right as author to stop external insulation that would have thickened the façades. The building has no heritage protection, so the next retrofit is still an open question.

The Mont d'Est business district, Noisy-le-Grand's 1970s office quarter, is where conversion has begun. The intermediate-rent landlord in'li has awarded a contract to turn an office building at 1 avenue Montaigne into 51 homes. Nearby, the Vendôme 1 tower is set to convert 7,000 m² of offices into coliving and family flats. A 2023 partnership contract with the Métropole du Grand Paris frames the renewal of the whole district. Research on adaptive reuse for housing suggests such conversions can become a steady share of supply once the rules allow them.

Treed It at the Cité Descartes is the new town's timber showcase. Its 37 m tower has a wooden frame, and the complex includes 284 social student homes and 120 homes for young workers. It sits on a campus of the Université Gustave Eiffel, inside a district planned for 2,603 homes heated by deep geothermal energy. The Grand Paris Express station at Noisy-Champs will link it to the metro network from 2027.

Résidence Unisson, on the edge of Noisy-le-Grand and Villiers-sur-Marne, is the land trust at work. La Coop Foncière and Immobilière 3F sold its 48 homes under BRS at €3,250 per m², close to 30% below the market. Buyers own their flat, the trust keeps the land, and every future sale stays capped. The Toulouse planning agency's study of the BRS finds the same mechanism working at scale in another French metropolis.

The Sycomore eco-district in Bussy-Saint-Georges and Les Roseaux in Montévrain show the new town still growing outwards. Sycomore plans 4,500 homes, a quarter of them social, and more than 1,800 are built. Les Roseaux holds 3,200 homes on 153 hectares. Both carry the state's ÉcoQuartier label, and both were planned on fields that the zero net land take rule would now protect.

So what does a town drawn for growth build for the people who stay? The pieces on the table are unusual in France: a state agency that owns the land, HLM builders with cooperative roots, a regional land trust and a first residents' group. They have yet to be joined into anything larger than a lot.