The average price per m² in Bailly is 3 952 €/m² for an apartment, based on actual notarised (DVF) sales. For a house or villa, it is 5 474 €/m². About 27 transactions are recorded each year.
Atmospheric illustration of Bailly, in the plain of Versailles.
In Bailly, the average price of an apartment stands at 3 952 €/m², based on DVF transactions actually registered before notaries (DVF is the French record of notarised property sales). Notably for a residential municipality of the Yvelines, the stock is mostly made of apartments, a legacy of the complexes built in the 1960s such as Harmonie Ouest, alongside an older fabric of houses. That average therefore mixes flats of varied sizes and a few areas of houses. The house market sits higher, at around 5 474 €/m². The figures rest on sales actually signed, not on theoretical estimates.
House : 5 474 €/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 Bailly market rests on a sought-after location in the western Yvelines, between Versailles and Saint-Germain-en-Laye, away from the main roads but well connected to the Paris conurbation. The reopening of rail service in July 2022, with the T13 tram, has given the municipality direct access to the railway again, a factor of appeal for households working west of Paris. Demand remains driven by families looking for a green setting, which supports prices despite a moderate annual sales volume, of the order of twenty-seven transactions.
Supply is split between apartments, in the majority and often from the 1960s programmes, and a rarer and more expensive stock of houses. That double market explains a marked price gap between flats and individual housing. As elsewhere in the Yvelines, energy performance has become a sorting criterion: well-rated dwellings sell faster, while energy-hungry properties call for a discount or works. The closeness of the forest of Marly, the Saint-Nom-la-Bretèche golf course and the facilities of the plain of Versailles sustains steady demand over the long term.
In the western Yvelines, Bailly sits at a level close to Marly-le-Roi and noticeably below Saint-Nom-la-Bretèche, while Versailles, its neighbour to the south, plays in a markedly higher price range.
The name of Bailly is attested from the Middle Ages, in forms such as Baalle in 1207 then Balliacum in 1351, before the name Bailly Val de Gallye recorded in 1559, which recalls its roots in the Val de Gally. Between the tenth and the thirteenth century, population growth accompanied the working of the land and the building of the village around its stone church. The church of Saint-Sulpice was built in the thirteenth century on the foundations of a tenth-century building: its vaults date from the fifteenth century, its nave and bell tower were reworked in the seventeenth, and in 1756 Louis XV granted it the title of Parish and Royal Church.
For a long time, Bailly remained a farming village nestled in the plain of Versailles, on the edge of the forest of Marly. After the Revolution, the municipality returned to its calling of walled gardens, vines, fields and orchards, worked by tenant farmers, market gardeners, florists and horticulturists. The nineteenth century brought wealthy landowners: the château du Tillet was restored, while the châteaux of La Châtaigneraie and La Pépinière were built. The latter was put up in 1850 by Charles Soulange Renard, a Paris banker, on a former fifteen-hectare tree nursery, a name that bears witness to the horticultural tradition of the municipality.
The present face of Bailly took shape in the twentieth century. The station, opened on the former Grande Ceinture line, closed in 1939 and for a time cut the municipality off from the railway. From the 1960s, Bailly changed with the building of residential complexes such as Harmonie Ouest, which took its population from 3 679 inhabitants in 1982 to a peak of 4 094 in 1999. There were 3 731 inhabitants in 2023, known as the Baillacois. In July 2022, rail service returned with the opening of the T13 tram, one of whose stops again bears the name of the municipality, linking Saint-Cyr-l'École to Saint-Germain-en-Laye.
Bailly has 3 731 inhabitants, a stable population, slightly below its peak of the late 1990s. According to INSEE, the French national statistics office, the municipality counts about 1 726 dwellings, of which 93 % are main residences and only 2,4 % second homes, the sign of a municipality lived in year-round rather than a tourist one. Unusually for this residential part of the Yvelines, apartments are in the majority, at 61,6 %, against 37,9 % houses. Owner-occupiers account for 77,7 % of households, according to INSEE. Buyers are mainly families and executives working in Versailles, Saint-Germain-en-Laye or the western Paris area, looking for a green setting well connected to the capital.
The average price of an apartment in Bailly is 3 952 €/m², based on sales registered before notaries and published in the DVF database. It is a municipal average, covering both a dwelling in the 1960s complexes and a more recent apartment. The location, the year of construction, the floor level, the aspect and the energy performance certificate explain most of the gaps. For your own property, a valuation based on comparable sales will always be more precise than the average alone.
The Bailly market has a particular feature: apartments outnumber houses, unlike many neighbouring municipalities of the Yvelines. Apartments, notably from the 1960s complexes, offer more accessible entry prices, at around 3 952 €/m² on average. Houses, rarer and often with a garden, sit at a markedly higher level, of the order of 5 474 €/m². Your choice will depend on your budget, your need for space and the closeness to transport you are looking for.
Bailly lies about eight kilometres west of Versailles, in the plain of the same name. Since July 2022, the municipality has been served by the T13 tram, which links Saint-Cyr-l'École to Saint-Germain-en-Laye and offers connections to the railway lines of the western Paris area. The road is still much used to reach Versailles, Saint-Germain or the A13 motorway. That transport service, long limited after the closure of the former station in 1939, explains part of the renewed residential appeal of the municipality.
Bailly is organised around its old centre, near the church of Saint-Sulpice, between residential complexes such as Harmonie Ouest and quieter areas of houses, on the edge of the forest of Marly. The closeness of the new tram stop, of the neighbouring Saint-Nom-la-Bretèche golf course and of the wooded areas adds value to some sectors. Each district has its own price logic, according to closeness to transport, schools and greenery. Local advice remains useful to place a specific property.
As everywhere, it is prudent to consult the planning documents and the risk statement before a purchase, the municipality being close to farmland and woodland. The energy performance of the dwelling deserves attention, as it now weighs in negotiations and in the works to be planned, particularly for the apartments of the 1960s. The taxe foncière, the local property tax, and the service charges should also be built into your budget. These elements are assessed case by case according to the property concerned.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).