The average price per m² in Le Port-Marly is 4 354 €/m² for an apartment, based on actual notarised (DVF) sales. About 49 transactions are recorded each year.
Mood illustration of Le Port-Marly, in the Yvelines.
In Le Port-Marly, the benchmark price stands at 4 354 €/m². That average covers a stock where apartments are in the majority, in a small municipality on the banks of the Seine. The market is marked by the closeness of Saint-Germain-en-Laye and Marly-le-Roi, and by the river and heritage setting. Price gaps owe to the location, the view, the condition of the property and the presence or not of outdoor space. That figure comes from DVF data, which records the transactions actually registered before notaries, and not from declared estimates.
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 Le Port-Marly market rests on its position in the west of the Paris region, close to Paris and to employment hubs such as La Défense, reachable from the neighbouring stations. The setting on the banks of the Seine, the heritage with the châteaux des Lions and de Monte-Cristo, and the proximity of Saint-Germain-en-Laye and Marly-le-Roi keep demand firm. The small size of the municipality mechanically limits the supply of available property, which can sharpen pressure on the best-placed dwellings. Together these factors place Le Port-Marly among the sought-after municipalities of this sector of the Yvelines.
Supply remains limited by the size of the territory and by a built fabric already largely in place along the river. That scarcity supports values, in particular for properties offering a view over the Seine or an outdoor space. The market is sensitive to the quality of the location and to the immediate surroundings, in a sector where the neighbouring municipalities show high price levels. As everywhere, the energy performance of dwellings weighs more heavily in negotiations. The closeness of transport towards Paris remains a central criterion, which shapes demand and the price gaps within the municipality.
Le Port-Marly sits at a high price level, in the middle of a much sought-after sector of the Yvelines along the Seine, between more affordable neighbouring municipalities and others that are clearly dearer.
Le Port-Marly owes its name to its historic role as a port on the Seine, serving Marly-le-Roi and its royal estate established under Louis XIV on the neighbouring heights. The municipality grew along the river, as a place of passage and trade where boats carrying goods and materials came alongside. That setting on the banks of the Seine, between the water and the slopes, shaped an urban fabric stretched along the riverbanks and the road that follows the water. The closeness of the royal residences of Marly and Saint-Germain has lastingly shaped the identity of the municipality and its appeal.
The heritage of Le Port-Marly is marked by the château des Lions, a former home of the lords of Prunay rebuilt at the beginning of the 19th century. It takes its name from the two statues of lions set at its entrance in the middle of that century. The painter Camille Corot, a friend of the owners, stayed there and painted several canvases in the early 1870s. Listed and registered as a historic monument since 1972, the château has housed the town hall since 1971. The banks of the Seine at Le Port-Marly also inspired impressionist painters, drawn by the reflections of the river and the activity along the water.
Le Port-Marly is also home to the château de Monte-Cristo, the house that the writer Alexandre Dumas had built for himself between 1844 and 1847 and named after his novel. Pressed by his debts, Dumas sold the estate on as early as 1848. Threatened with demolition at the end of the 1960s, the ensemble was bought by the municipalities of Le Port-Marly, Marly-le-Roi and Le Pecq, restored, then turned into a museum devoted to the writer, opened to the public in 1994. That literary heritage, combined with the river setting, adds to the appeal of the municipality, which today has around 5 559 inhabitants.
The Le Port-Marly market reflects a residential municipality of the Yvelines close to Paris. According to INSEE, the French national statistics institute, it has 5 559 inhabitants, and close to 88 per cent of its stock is made up of main residences. Apartments are in the majority and the share of owner-occupiers is near half, which points to a notable presence of tenants. Buyers are often working people employed in Paris or in the west of the Paris region, drawn by the setting on the banks of the Seine and by the closeness of Saint-Germain-en-Laye. There are also households looking for a quieter setting than the capital while staying well connected, which supports demand.
The benchmark price in Le Port-Marly is 4 354 €/m², according to DVF data drawn from the transactions registered before notaries. It is a market average, all types of property combined. The real price of a dwelling depends on its floor area, its condition, its view over the Seine, its storey and the presence of outdoor space. In a small municipality, the gaps from one property to another can be marked. A personalised valuation makes it possible to refine that benchmark.
Properties on the banks of the Seine, with a view over the river and close to the water, are among the most in demand. The surroundings of the château de Monte-Cristo and the detached-housing sectors slightly above the river are also appreciated for their quiet. The closeness of Saint-Germain-en-Laye, its shops and its transport adds value to well-connected dwellings. In a tightly drawn municipality, the precise location, the aspect and the quality of the immediate surroundings make a noticeable difference to prices.
Le Port-Marly has no station on its territory, but benefits from the closeness of several stations. The Saint-Germain-en-Laye station, terminus of the RER A, gives access to central Paris and to the La Défense business district, while the gare de Marly-le-Roi, on a Transilien line, serves Paris Saint-Lazare. A bus network links the municipality to those stations. Those connections, completed by the road routes along the Seine, explain part of the residential appeal of the municipality.
The stock of Le Port-Marly is dominated by apartments, in keeping with a small municipality whose building is tightly set along the Seine. Detached houses exist but remain fewer, which makes them sought-after properties. For a first purchase or a dwelling well connected to Paris, the apartment matches the dominant profile of the market. A house, rarer, suits households with a higher budget who value space and private outdoor space.
Property tax, known in France as the taxe foncière, is based on the cadastral rental value of the property and on the rates voted by the municipality, the inter-municipal body and the Yvelines department. In a municipality where the apartment dominates, the amount varies above all with the floor area and the location of the dwelling. The rates are revised each year and it is prudent to check the exact amount with the town hall or on a recent tax notice before buying. Building that annual charge into the overall budget avoids unpleasant surprises.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).