The average price per m² in Trappes is 2 754 €/m² for an apartment, based on actual notarised (DVF) sales. For a house or villa, it is 3 631 €/m². About 119 transactions are recorded each year.
Ambience illustration of Trappes, between the étang de Saint-Quentin and the railway yard, in the Yvelines.
In Trappes, the average price of an apartment stands at 2 754 €/m². That average covers a stock that is very largely collective, marked by the post-war housing estates built in the 1960s and 1970s around the station and the Merisiers district, to which are added more recent blocks born with the new town of Saint-Quentin-en-Yvelines. Houses, which are rarer, trade at a higher level, around 3 631 €/m², often in the low-rise streets inherited from the old village. These figures come from the DVF database, which records the sales actually registered before notaries.
House : 3 631 €/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.
The Trappes market rests on demand for affordable housing in an area of the Yvelines where the neighbouring municipalities of Saint-Quentin-en-Yvelines show higher values. The town attracts first-time buyers and households looking to stay close to the employment hubs and the transport of the new town without paying its price. The presence of the station, of the railway complex and of lines N and U structures part of that demand, in particular among people who work in Paris or at La Défense.
Supply is marked by the weight of the post-war housing estates and of social housing, which weighs on the municipal average, while the low-rise stock and the more recent schemes pull values up. The urban renewal operations carried out over many years on districts such as the Merisiers are gradually redrawing the stock. As everywhere in the Paris region, energy performance has become a criterion of negotiation, above all on older blocks. The closeness of the étang de Saint-Quentin and of its nature reserve works in favour of the sectors that enjoy it.
Within the conurbation of Saint-Quentin-en-Yvelines, Trappes sits below its immediate neighbours: its values remain more affordable than in Montigny-le-Bretonneux, in Bois-d'Arcy and, to a lesser extent, in Élancourt.
Trappes was long a farming village of the plaine de Versailles, crossed by the royal road from Paris to Chartres. Its fate changed in the 17th century: between 1677 and 1678, on the orders of Louis XIV, the étang de Trappes was dug, today the étang de Saint-Quentin, to supply water to the fountains and basins of the château de Versailles. That vast body of water, the largest in the Yvelines, remains the most visible mark of that hydraulic past.
The second transformation came from the railway. The line from Paris to Chartres reached the municipality in 1849, and in 1911 the company decided to install a depot and a marshalling yard there. The railway complex then made Trappes one of the great centres of the railways in France. Thousands of railway workers and their families settled there, turning the village into a working-class town. From that period date the Dents de Scie, a set of railway workers' dwellings built in 1931, whose gables set at 45 degrees draw a broken line: threatened with demolition in the 1980s, they were saved by the mobilisation of residents and are today protected as historic monuments.
In 1944, the depot and the marshalling yard, strategic targets, were heavily bombed, then rebuilt between 1945 and 1947. From the 1970s, Trappes changed face again with the creation of the new town of Saint-Quentin-en-Yvelines, of which it is one of the founding municipalities. The arrival of many residents, including immigration coming notably from Africa, shaped a working-class town, young and diverse, which keeps its railway identity while fitting into a wider conurbation.
Trappes has around 34 689 inhabitants, which makes it one of the most populated municipalities of Saint-Quentin-en-Yvelines. The housing stock is dominated by flats: the post-war housing estates of the Merisiers and of the neighbouring districts, built to house railway workers and factory workers in the 1960s and 1970s, weigh heavily, with a large share of social housing. Houses, which are rarer, are concentrated in the low-rise fabric of the old village and in a few more recent sectors. Buyers are mainly households of the Yvelines looking for affordable housing near the employment hubs of the new town, first-time buyers and families drawn by the closeness of the étang and of the transport links.
The average price of an apartment comes out at 2 754 €/m², based on the sales registered before notaries and published in the DVF database. It is a municipal average, which covers both a dwelling of the housing estates and a recent apartment of the new town. The address, the storey, the year of construction and the energy performance explain most of the gaps. For a reliable valuation, it is better to rely on comparable sales than on the average alone.
The municipality reads according to several logics. Around the station and in the Merisiers district, the post-war housing estates of the 1960s and 1970s dominate, with a strong presence of social housing. The old village keeps a more low-rise fabric and a few old streets. The fringes close to the étang de Saint-Quentin and to the facilities of the new town offer a greener setting. These atmospheres do not sell at the same level.
The Trappes station is served by lines N and U of the Transilien, which link in particular Paris-Montparnasse and La Défense via La Verrière. The journey to Paris takes about thirty minutes depending on the service. The municipality is also linked to the road network by the N10 and lies close to the A12, which does however weigh on the noise environment of certain sectors. That rail accessibility is one of the strengths buyers look at first.
It is possible, but supply is limited. The stock of the municipality is very largely made up of apartments, and houses are concentrated above all in the low-rise fabric of the old village. They trade at a higher level than the flats, around 3 631 €/m². Since sale references are fewer there, the valuation of a house depends a great deal on its condition, its plot and its location, more than on the municipal average.
The étang de Saint-Quentin is the largest body of water in the Yvelines and the heart of the leisure island, with its water sports and its walks. Its western part holds a national nature reserve, created in 1986, the first in the Paris region, where more than 260 species of bird have been recorded. That green setting and this leisure base are an argument of quality of life for the sectors that border them, and a criterion appreciated by families.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).