The average price per m² in Rosny-sous-Bois is 3 732 €/m² for an apartment, based on actual notarised (DVF) sales. For a house or villa, it is 5 169 €/m². About 318 transactions are recorded each year.
Mood illustration of Rosny-sous-Bois, in the Seine-Saint-Denis.
The average price recorded in Rosny-sous-Bois stands at 3 732 €/m². That average covers a stock largely made up of flats, where apartments account for more than eight dwellings in ten according to INSEE, the French national statistics institute. The large estates of the Marnaudes and of the Bois-Perrier, built from the 1960s onwards, do not trade at the same level as the low-rise detached housing of the plateau d'Avron or of Rosny Sud, whose houses come out at around 5 169 €/m². The immediate closeness of the Line 11 and RER E stations also weighs on the gaps. The amounts come from the DVF database, which records the transactions actually registered before notaries.
House : 5 169 €/m²
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 3 978 €/m² in 2021, the average price in Rosny-sous-Bois reaches 3 732 €/m² in 2026, roughly -6 % over the period.
The first driver of the Rosny market is transport catching up. The extension of Line 11 to Rosny-Bois-Perrier, opened on 13 June 2024 after eight years of works, brought the centre of Paris to around twenty minutes and served on the way La Boissière and Les Coteaux Beauclair, two sectors until then dependent on the bus. The works on the Line 15 East station, under way on the forecourt of the RER station, extend that momentum. A municipality of the Seine-Saint-Denis that goes from two RER stations to a multimodal hub changes its relative position in the conurbation.
The second driver lies in the make-up of the stock and in local employment. Rosny-sous-Bois combines large estates from the urbanisation of the 1960s and 1970s, on which renovation schemes are focused, and an older fabric of low-rise detached housing that feeds a supply of houses rare at this price level in the inner suburbs of Paris. Westfield Rosny 2, opened in 1973 and refurbished in 1997 and then in 2016, remains a structuring retail and employment hub for the east of Paris. The fort of Rosny, occupied by the gendarmerie nationale since 1921, also anchors a lasting public activity on the territory.
Rosny-sous-Bois sits well below Montreuil, its immediate neighbour, at a level close to Champigny-sur-Marne and above Aulnay-sous-Bois. Its recent metro service explains part of that spread.
The site was occupied from Merovingian times, as archaeological digs around the church have shown. A papal bull of 1163 mentions Rodoniacum: the church and the village around it then belonged to the abbey of Sainte-Geneviève in Paris. The name became Rosny in 1344, then Rôni in the 18th century. The territory stayed rural for centuries, covered with vines and crops that supplied the capital. The present name, Rosny-sous-Bois, was only officially adopted in 1897, to tell the municipality apart from the other places called Rosny in the Île-de-France. The village was then still modest, gathered around its church and its farms.
The 19th century put in place the infrastructure that would decide the shape of the town. The redoubt of La Boissière was built in 1831, then the fort of Rosny between 1840 and 1846, as part of the belt of detached forts protecting Paris. The Paris-Mulhouse railway line opened in 1852 and the first station served the municipality from 1856. During the Franco-German war of 1870-1871, the plateau d'Avron became one of the high points of the defence of Paris and came under heavy bombardment. In 1894, three tramway lines run by the Chemins de fer nogentais finally linked the town to its neighbours.
The 20th century turned the village into a dense suburban town. A public office for low-cost housing was created in 1926, and the first estate, the résidence du Général-Leclerc, was inaugurated in 1933. Since 1921, the fort has housed the technical and scientific services of the gendarmerie nationale, a role it has kept. The redoubt of La Boissière was demolished in 1966 and replaced by residential towers. Work on the Rosny 2 shopping centre started in August 1971 and the complex opened on 27 February 1973: it was then the largest shopping centre in the east of Paris by volume. It has borne the name Westfield Rosny 2 since 2019.
Rosny-sous-Bois has 47 180 inhabitants. According to INSEE, the municipality counts around 22 800 dwellings, of which 87,5 % are main residences and only 2,5 % second or occasional homes: the market is therefore residential, with no holiday dimension. Again according to INSEE, 82,4 % of dwellings are apartments and 15,9 % houses, a direct legacy of the large estates of the 1960s and 1970s. The split between owners (43,6 %) and tenants (52,2 %) is more balanced than in many neighbouring municipalities. Buyers are mainly working households employed in Paris or in the east of the Paris region, and families looking for a house at a budget out of reach inside the capital.
The average price recorded in Rosny-sous-Bois is 3 732 €/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 the Marnaudes and a house on the plateau d'Avron, the gap is wide. A valuation address by address remains necessary before setting a sale price.
The municipality is divided into four districts. Centre-Ville, Plateau d'Avron and Beauséjour bring together the town hall, the church and a large share of the low-rise detached housing. Marnaudes and Bois-Perrier hold the Westfield Rosny 2 shopping centre, the RER E station and the large estates. La Boissière and Les Coteaux Beauclair, to the north-west, touch Montreuil and Noisy-le-Sec. Rosny Sud, lastly, is an almost exclusively residential sector, quieter and more turned towards the detached house.
Two RER E stations serve the municipality, Rosny-sous-Bois and Rosny-Bois-Perrier. Since 13 June 2024, metro Line 11 has been extended to Rosny-Bois-Perrier, with the Les Dhuys and Coteaux Beauclair stations as well: the journey to Châtelet takes around twenty minutes. The municipality is also bordered by the A3 and the A86, which explains a large share of car journeys towards the employment hubs of the east of the Paris region.
Rosny-Bois-Perrier will be the only station of the town on Line 15 East of the Grand Paris Express, set on the forecourt of the current RER station, with an interchange towards the RER E and Line 11. The opening of the section towards Champigny is announced for around 2030. The sectors within walking distance of the future hub already draw closer attention from buyers, without any figured effect being possible to isolate at this stage.
The two markets coexist, which is not common in the inner suburbs of Paris. INSEE counts around 3 600 houses for 18 800 apartments. The low-rise detached housing is concentrated on the plateau d'Avron, in Beauséjour and in Rosny Sud, whereas apartments dominate in the Marnaudes, in the Bois-Perrier and in La Boissière. Houses come out at around 5 169 €/m², clearly above the municipal average, a gap that owes to the scarcity of the product and to the value of the land.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).