The average price per m² in Martellière (Saint-Sébastien-sur-Loire) is 2 802 €/m² for an apartment, within a range of 2,4 to 3,3 k€ per m², based on actual notarised (DVF) sales. Over the period, the market fell 9 % over 5 years and fell 5,7 % over the last 12 months, with about 27 transactions per year.

La Martellière, a district in the west of Saint-Sébastien-sur-Loire, at the Nantes boundary.
Apartments in the Martellière district, in Saint-Sébastien-sur-Loire, sell at an average price of around 2 802 €/m², based on prices actually recorded (DVF transactions, notarised sales). Between 2 400 and 3 289 €/m² covers half of all sales, the gap depending on the type of property, the floor, the condition and the proximity of the Loire. Five-year change: -9 %.
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 3 086 €/m² in 2021, the average price in the Martellière district of Saint-Sébastien-sur-Loire reaches 2 802 €/m² in 2026, around -9 % over the period.
The shops of the avenue de la Martellière are complemented by those of the centre of the town.
The Praud woods, the park planted with sequoias and the Portechaise area, towards the Loire, mark the district.
The Martellière sports hall hosts the sports clubs of the area.
La Martellière, a district in the west of Saint-Sébastien-sur-Loire. Google Maps.
La Martellière occupies the west of Saint-Sébastien-sur-Loire, at the Nantes boundary, between La Baugerie and the banks of the Loire. A former village now absorbed into the town, it has kept a few picturesque houses and a private park planted with sequoias.
The district takes in the Portechaise area, a former riverside suburb whose line starts at the rue de la Fonderie and which has no statistical existence of its own. The Praud woods, the Martellière sports hall and the shops of the avenue de la Martellière serve the area, at once urban and open to the river.
On the market, La Martellière is the most affordable district in Saint-Sébastien-sur-Loire, at around 2 802 €/m² for an apartment, on a volume of about 27 sales a year. The area falls by around 9 % over five years, the sharpest decline in the town.
La Martellière attracts first-time buyers and investors looking for the best balance of price and location in the town, on the doorstep of Nantes and close to the Loire. Demand focuses on the apartments of the local condominiums and on the houses of the former village, at the lower end of the town's range.
The average price in Martellière is 2 802 €/m² for an apartment (actual DVF transactions, notarised sales), within a range of 2 400 to 3 289 €/m² depending on the building, the floor and the condition.
The district occupies the west of the town, at the Nantes boundary, between La Baugerie and the banks of the Loire. It takes in the Portechaise area, a former riverside suburb starting at the rue de la Fonderie.
The area mixes an older housing stock with a wider supply of apartments than the rest of the town, which weighs on the average. It stands at around 2 802 €/m², against 3 248 €/m² for Saint-Sébastien-sur-Loire as a whole, on a volume of about 27 sales a year.
The area mixes condominiums, houses of the former village and detached homes. It suits first-time buyers and investors looking for an entry price into the town, on the doorstep of Nantes.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).