The average price per m² in Le Trapèze (Boulogne-Billancourt) is 8 084 €/m² for an apartment, within a range of 7,2 to 9,2 k€ per m², based on actual notarised (DVF) sales. Over the period, the market fell 12 % over 5 years and fell 0,8 % over the last 12 months, with about 204 transactions per year.
Le Trapèze, a new eco-district facing the Île Seguin and La Seine Musicale.
Apartments in the Le Trapèze district, in Boulogne-Billancourt, sell at an average price of around 8 084 €/m², based on the prices actually recorded (DVF transactions). Between 7 183 and 9 162 €/m² covers half of the sales, the spread coming down to the storey, the aspect and the condition of the property. Five-year change: -12 %.
Prices from the DVF file (Demandes de valeurs foncières, published by the DGFiP), transactions actually recorded at the notary, aggregated at district level using the IRIS zoning of INSEE. Cross-referenced with the Notaires de France - INSEE indices. Learn more about our methodology.
After 9 135 €/m² in 2021, the average price in the Le Trapèze district of Boulogne-Billancourt reaches 8 084 €/m² in 2026, roughly -12 % over the period.
Local shops and services on the ground floors, designed with the district along the tree-lined courses.
The parc de Billancourt (seven hectares), La Seine Musicale on the Île Seguin and the banks of the Seine at the foot of the buildings.
A new eco-district with the ÉcoQuartier label, recent buildings and green spaces give Le Trapèze its character.
The Le Trapèze district, in Boulogne-Billancourt. Google Maps map.
The Le Trapèze district occupies the Billancourt bank, in the south of Boulogne-Billancourt, on the former sites of the Renault factories. It is a new eco-district, built during the 2010s facing the Île Seguin, and one of the major urban conversion projects of the western Paris area.
The area is laid out around the parc de Billancourt, seven hectares of green space at the heart of the district, and the cours de l'Île Seguin which runs down to the Seine. Facing Le Trapèze, the Île Seguin hosts La Seine Musicale, a concert hall delivered in 2017, and a cultural hub still developing. The district received the French ÉcoQuartier sustainable-neighbourhood label as early as 2013.
Sought after for its new-build setting, its green spaces and its neighbourhood life facing the Seine, Le Trapèze draws sustained demand. Recent, well-equipped housing is scarce by the standards of the town; prices per m² sit at around the Boulogne-Billancourt average, with a premium for properties facing the park or the Seine.
The Le Trapèze district attracts families, working people and managers looking for a new, well-equipped home, in an eco-district facing the Seine and the Île Seguin. Demand covers recent apartments, from the two-room flat to large family homes, with a premium for properties looking onto the parc de Billancourt or the Seine. The setting and the amenities support prices per m² at around the Boulogne-Billancourt average.
The average price in Le Trapèze is 8 084 €/m² for an apartment (actual DVF transactions, notarised sales), within a range of 7 183 to 9 162 €/m² depending on the building, the storey and the condition.
It is a new eco-district, built on the former Renault sites facing the Île Seguin, laid out around the parc de Billancourt (seven hectares) and La Seine Musicale. Awarded the French ÉcoQuartier label in 2013, it appeals for its green setting, its recent homes and its riverside neighbourhood life.
Essentially recent apartments, from the two-room flat to large family homes, in developments from the 2010s onwards. Properties looking onto the parc de Billancourt, the cours de l'Île Seguin or the Seine, with a balcony or a terrace, are the most sought after and the most highly valued.
The district sits at around the average of the Boulogne-Billancourt market, already one of the most expensive towns in the Paris region outside Paris. The recent building stock and the properties facing the park or the Seine keep prices per m² firm, with a premium for the best views.
Yes. The T2 tram runs along the Seine quays, towards La Défense to the north and south-west Paris, and Pont de Sèvres station (metro line 9) is reachable towards Paris. The bus routes and the cycle routes along the Seine complete the links serving the district.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).