The average price per m² in L'Île-Saint-Denis is 3 883 €/m² for an apartment, based on actual notarised (DVF) sales. About 31 transactions are recorded each year.
Mood illustration of L'Île-Saint-Denis and its banks of the Seine.
The average price recorded in L'Île-Saint-Denis stands at 3 883 €/m². That average covers a stock almost entirely made up of flats, where apartments account for more than nine dwellings in ten. Internal gaps come mainly from the age of the buildings: the new dwellings of the riverside eco-district, at the centre of the island, do not trade at the same level as the older condominiums and blocks of flats of the rest of the municipality. The island layout, long and narrow, limits the supply of land. This figure comes from the DVF database, which records sales actually registered before notaries.
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.
The main driver of the local market is the transformation of the centre of the island. The industrial brownfield of twenty-two hectares left by the warehouses has been converted, by way of the Olympic village of 2024, into a riverside eco-district delivering hundreds of new dwellings. That recent output widens supply and introduces a price segment above that of the older stock. It attracts first-time buyers and Paris-region households won over by high-performing dwellings, a waterside setting and a quarter designed without cars. That renewal supports transaction activity in a municipality that was industrial for a long time.
The second factor is the position of L'Île-Saint-Denis within the Grand Paris. The municipality touches Saint-Denis and Saint-Ouen-sur-Seine, two hubs undergoing deep change, and benefits from tram T1 as well as from the closeness of Lines 13 and 14 of the metro and of the RER. That accessibility feeds steady demand from households looking for an entry price lower than in the better-served neighbouring municipalities. The island shape, narrow and elongated, conversely limits the land available outside the eco-district, which holds back supply across the rest of the territory.
L'Île-Saint-Denis sits in the lower middle range of this sector of the Seine loop. It trades above Épinay-sur-Seine, behind Gennevilliers, and well below Saint-Ouen-sur-Seine, which is closer to Paris.
The island owes its name to the abbey of Saint-Denis, which held its lordship from the 14th century until the Revolution. The place had previously borne the name Isle de Chastelier, in reference to the castle that stood there. As early as 998, Bouchard le Barbu held a stronghold on the central islet; it was destroyed in 1088 on the orders of King Robert II the Pious. In the 14th century, Charles V handed the Châtelier over to the monks of Saint-Denis. The municipality has a rare geographical feature: it occupies in its entirety an island of the Seine, a narrow ribbon of land, one hundred to three hundred metres wide, framed by two arms of the river.
Long broken up into several islets, the island took its present shape at the end of the 19th century, when the filling in of the channels joined those banks into a single strip of land. The first suspension bridges linked it to Saint-Denis and to Gennevilliers as early as 1844, then to Saint-Ouen in 1856. That new accessibility drew industry: metalworking, chemicals and shipyards settled along the quays, and vast warehouses, including those of Printemps and Galeries Lafayette, occupied the centre of the island. The Seine flood of 1910 struck that riverside fabric hard. The town of today keeps the trace of that working-class and river past.
Deindustrialisation left, at the centre of the island, a brownfield site of twenty-two hectares that local elected officials sought to convert for close to twenty years. Tram T1 reached the municipality in 2012. The great turning point came with the Paris 2024 Olympic and Paralympic Games: with Saint-Denis and Saint-Ouen-sur-Seine, L'Île-Saint-Denis hosted part of the athletes' village, which housed about two thousand seven hundred athletes during the summer of 2024. The site was then converted into a riverside eco-district, a mixed car-free quarter combining housing, a student residence, offices and amenities. That scheme received the national Grand Prix for urban development in 2025.
L'Île-Saint-Denis has 8 696 inhabitants. According to INSEE, the French national statistics institute, the housing stock is lived in year-round: main residences account for close to 95 % of the total, the municipality having no second-home vocation. Again according to INSEE, apartments make up around 94 % of dwellings and houses only 6 %, which reflects a dense urban fabric of flats. Tenants are in the majority, at around 69 % of households, against slightly more than 31 % owners, a proportion that reflects the weight of the social and private rental stock. Buyers are mainly first-time buyers and Paris-region families looking for an apartment close to Paris, along with households drawn to the new dwellings of the eco-district.
The average price recorded in L'Île-Saint-Denis is 3 883 €/m². It is an average calculated on the sales in the DVF database, which records the transactions actually completed before notaries. It blends older dwellings and new apartments of the riverside eco-district, at very different price levels. Your property may depart from it depending on the storey, the condition, the outlook over the Seine, and the presence of a lift or a parking space.
The centre of the island, around the riverside eco-district born of the Olympic village of 2024, concentrates the most recent dwellings and new-build fittings, often above the municipal average. The older condominiums and blocks of flats of the north and the south of the island sit lower. The view over the Seine and the closeness of a tram stop also weigh on the values recorded.
The municipality is crossed by tram T1, which links it to Saint-Denis and to Asnières-Gennevilliers. From Saint-Denis, Line 13 of the metro and the RER D reach the centre of Paris in about twenty minutes. Several bus lines complete the service on the island. Its elongated shape does mean, however, that access times vary noticeably depending on whether you live in the north or in the south of the territory.
The market is almost exclusively made up of flats: according to INSEE, around 94 % of dwellings are apartments and only 6 % houses. A few older town houses remain in the inner streets, but supply is very rare and goes quickly. If you are looking for a house, you have to accept a longer search and, often, a renovation budget, since the older stock of the island is small.
Yes, it is a point to look at before buying. The municipality occupies in its entirety an island of the Seine and remains exposed to flood risk, as the historic flood of 1910 recalled when it submerged a large part of the riverside fabric. The seller must give you a statement of risks setting out the situation of the property. It is prudent to check that document and the insurance cover before making an offer.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).