New building prices in Ile-de-France: the Top 20 cities where prices are soaring and those where prices are falling sharply

The new real estate specialist website Trouver-un-logement-neuf.com has unveiled a special barometer of new real estate prices in the Île-de-France region. Produced using data collected in the region's 20 most dynamic cities in terms of construction, i.e., those with at least five new developments currently on the market, this barometer highlights contrasting changes over the past year in the average price of a three-room apartment, the benchmark surface area.

Marked drops in several municipalities in the inner suburbs

As at the national level, the Île-de-France region is showing a stable trend. It costs just over €370.000 to buy a new three-room apartment in the Paris region, €1.000 more than a year ago. This represents an increase of +0.27%, well below current inflation.

In detail, it is mainly localities in Greater Paris that have recorded significant drops, such as Saint-Denis: -9,92%, Colombes: -9,86%. Poissy in Yvelines completes the podium of the biggest drops: -8,33%.

Other cities experiencing declines include Puteaux (-3,96%), Clamart (-3,08%), and Saint-Ouen-sur-Seine (-2,40%). These price declines reflect a market correction after several years of sustained growth and also reflect adjustments to credit access conditions since the sharp rise in interest rates in 2022.

Like Poissy, a leading transport hub with the new RER E and the extension of Tram 13, it should be noted that these municipalities remain very well located and attractive, which could make them opportunities for investors looking for new products in well-served urban areas.

More increases in the outer suburbs… and in Paris!

Conversely, other cities saw their prices rise sharply. Drancy stands out with a record increase of +12,47%, closely followed by Paris itself, which recorded a spectacular +10,05% in new property prices, now averaging €884.400 in Q3, compared to €803.600 last year. This increase reflects the scarcity of supply in the capital and the strong demand for new properties meeting demanding energy standards.

Significant increases are also observed, beyond inflation, in Stains: + 8,06%, L'Haÿles-Roses: + 6,19%, Bezons: + 2,77% or Meaux: + 2,70%, demonstrating the growing attraction of peripheral sectors, often more affordable, well connected to transport and targeted by urban renewal policies.

Seine-Saint-Denis, the most active department!

Seine-Saint-Denis (93) is the most represented department in this ranking with 8 out of 20 towns, which underlines the intensity of new construction in this rapidly changing territory. Hauts-de-Seine (92), with 4 towns, confirms its historical attractiveness, although prices have generally fallen.

The other departments of the Île-de-France region are each represented by only one or two dynamic municipalities, possibly demonstrating the brakes put on new developments in the outer suburbs by developers since the decline in sales that began in mid-2022. This decline in supply could well penalize the recovery and cause prices to rise again if demand quickly returns.

Top 3 most expensive and affordable cities

Unsurprisingly, Paris remains the most expensive city in the ranking with an average price of a three-room apartment of €884.400, followed by Puteaux (€605.800) and Saint-Germain-en-Laye (€555.400), two towns in Hauts-de-Seine and Yvelines which combine a sought-after living environment and proximity to Paris.

Conversely, the most affordable prices are found in Stains (€237.400 for a 3-room apartment), Drancy (€269.600) and Poissy (€266.300), towns that can be a gateway for first-time buyers or investors looking for rental returns on new properties.

A multi-speed map of the Paris region

This annual barometer illustrates the complexity of the new real estate market in the Île-de-France region, where very different dynamics coexist depending on the location. Accessibility, the quality of transport, urban renewal projects, and local policies regarding the issuance of building and housing permits all have a significant influence on price trends.

More than ever, buyers must refine their acquisition strategy based on their budget, their life plan, and their valuation horizon. Thanks to Trouver-un-logement-neuf.com, they can access reliable and up-to-date information on more than 650 programs currently on the market, not to mention inquiries about promotional offers from developers available throughout the Paris region.

For Céline Coletto, spokesperson for Find-un-logement-neuf.com: "This barometer highlights very concrete opportunities for investors seeking profitability in new properties. In certain municipalities such as Saint-Denis, Poissy, and Colombes, prices have fallen significantly, even though rental demand remains strong. This is the ideal time to enter the market, especially since these cities often benefit from major urban projects or new transport lines, which strengthen their medium-term growth potential."

The biggest price changes for new homes in the Ile de France region in one year

Consult here the price of new real estate city by city

Methodology: a real-time calculation method

The current average price of new real estate in France was calculated on Monday, April 14, 2025 for a new three-room apartment, according to the prices indicated each day by advertisers on the Trouverun-logement-neuf.com website: on a minimum basis of 5 different new real estate programs for each location in the Paris region.

Illustrative image of the article via Depositphotos.com.