The average price per m² in Poissy is 3 710 €/m² for an apartment, based on actual notarised (DVF) sales. About 304 transactions are recorded each year.
Mood illustration of Poissy, in the Yvelines.
The average price recorded in Poissy stands at 3 710 €/m². That average covers a stock very largely made up of flats, where apartments account for more than eight dwellings in ten according to INSEE, the French national statistics institute. It mixes the post-war housing estates built from the late 1950s, such as Beauregard, more recent blocks that came out of the town's redevelopment schemes, and the older fabric of the centre, around the collegiate church. Houses, concentrated on the slopes and along the banks of the Seine, trade above that average. The figures come from the DVF database, which records the transactions actually registered before notaries, and not the prices shown in listings.
Prices from the DVF file (Demandes de valeurs foncières, published by the DGFiP), transactions actually recorded at the notary at municipality level. Cross-referenced with the Notaires de France - INSEE indices. Learn more about our methodology.
After 3 721 €/m² in 2021, the average price in Poissy reaches 3 710 €/m² in 2026, roughly +0 % over the period.
The first driver of the Poissy market is its rail service. Terminus of one branch of the RER A and a stop on Line J, the town lies some twenty minutes from La Défense, and the extension of the RER E planned from 2027 should shorten that journey further. That accessibility explains a population rising by about 1,5 % a year between 2017 and 2023 according to INSEE, fed by working households coming from Paris and the Hauts-de-Seine. The redevelopment of the station hub and the new-build schemes that go with it concentrate a notable share of recent transactions.
The second driver lies in the reshaping of the housing stock. The urban renewal project for Beauregard, under way since 2021 with a budget of about 58 million euros, covers the refurbishment of 1 724 social housing units and of 336 units in private blocks, with new public spaces and a health centre. La Coudraie is the subject of a comparable programme. These operations are gradually changing the image of the districts concerned and the gap that separates them from the centre. On the employment side, the announced conversion of the Stellantis site will weigh more on the local industrial base than on residential demand.
Poissy sits at the bottom of its group of neighbours, below the residential municipalities of the loop, from Louveciennes to Maisons-Laffitte. The gap owes above all to the structure of the stock, very largely made up of flats, and to the industrial past of the town.
The name Poissy derives from the Roman personal name Pincius followed by the suffix -acum. Under the Merovingians, the town was the capital of the Pincerais, a district of the Seine valley. Robert II the Pious made it a royal residence and had the church of Notre-Dame built between 996 and 1031. Saint Louis was born there in 1214 and baptised there, which gives the town a lasting place in Capetian history; Philippe III the Bold was in turn born there in 1245. After the canonisation of Louis IX in 1297, work on the royal priory of Saint-Louis opened in 1303.
Poissy then owed its prosperity to its cattle market, granted royal trading rights as early as 1245. For more than six centuries it supplied Paris with meat, until its transfer to La Villette in 1867. The town also hosted, from 9 to 26 October 1561, the Colloquy of Poissy, an attempt at conciliation between Catholics and Protestants sought by Catherine de Médicis. The railway arrived early: the station was opened on 9 May 1843, on the Paris to Rouen line. That early service, together with the crossing of the Seine, began the shift from a small market town to a suburban municipality.
The 20th century made Poissy an industrial town. The car plant set up on the banks of the Seine started production at the beginning of 1940 under the Ford SAF name, before passing to Simca, Chrysler, Talbot, then to the PSA group and today to Stellantis. Its growth called for housing: the Beauregard district rose from the ground in the late 1950s with more than 2 000 dwellings, followed by La Coudraie. The town is also home to a landmark of modern architecture, the villa Savoye, built by Le Corbusier and Pierre Jeanneret between 1928 and 1931, listed as a historic monument on 16 December 1965 and inscribed on the UNESCO World Heritage list on 17 July 2016.
Poissy has 40 983 inhabitants and its population is growing by about 1,5 % a year between 2017 and 2023 according to INSEE. The stock counts 19 344 dwellings, of which 93,6 % are main residences and only 1,3 % second homes: people buy here to live, not to stay. Again according to INSEE, 82,4 % of dwellings are apartments, 41,6 % of households are owners and 56,6 % are tenants. Buyers are therefore mainly working households and first-time buyers looking for a municipality linked to La Défense and to Paris, at a price level below that of the neighbouring residential municipalities of the Seine loop.
The average price recorded in Poissy is 3 710 €/m², all sales combined. That figure comes from the DVF database, which records the transfers actually registered before notaries, and not from online listings. It is a municipal average: between an apartment in Beauregard, a recent block near the station and a house on the slopes, the gap is clear. A valuation address by address remains necessary before setting a sale price.
The old centre, around the collegiate church of Notre-Dame and the market, along with the immediate surroundings of the station, benefit from the shops and the rail service. The slopes and the banks of the Seine, where the houses and the wooded properties are concentrated, form the top of the local market. The post-war housing estates built from the late 1950s, Beauregard and La Coudraie, remain markedly more accessible, with a majority of social housing.
The station of Poissy has been the terminus of one of the western branches of the RER A since 29 May 1989, and it is also served by Line J of the Transilien towards Paris Saint-Lazare. The extension of the RER E towards Mantes-la-Jolie is due to take over that service from 2027 and to bring La Défense within about fifteen minutes. Traffic at the station now exceeds thirteen million passengers a year.
The market is first of all one of apartments: 82,4 % of the stock according to INSEE, and the very large majority of annual sales. The house remains a minority, around 15,8 % of dwellings, and is concentrated on the slopes, the banks of the Seine and the low-rise residential streets. It trades above the municipal average. The choice depends above all on the budget and on the distance accepted to the station.
Stellantis confirmed in April 2026 the end of car assembly in Poissy by the end of 2028, in favour of spare parts, preparation and vehicle dismantling activities, with an announced investment of 100 million euros. The site therefore stays in operation, but with fewer production jobs. The effect on prices will be judged over time: the municipality draws its demand above all from its rail service.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).