The average price per m² in Cachan is 4 998 €/m² for an apartment, based on actual notarised (DVF) sales. About 201 transactions are recorded each year.
Ambience illustration of Cachan, in the Val-de-Marne.
The average price recorded in Cachan stands at 4 998 €/m² for an apartment. That average covers a stock made up mainly of flats: the blocks of the 1960s that replaced the garden city, the more recent developments in the centre and around the station, and a fabric of detached houses inherited from the housing developments of the early 20th century, in particular on the Coteau and towards the Grange-Ory. The distance to Arcueil-Cachan station, the topography of the Bièvre valley and the period of construction explain most of the gaps from one sector to another. The figures come from the DVF database, which lists sales actually registered before notaries.
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 market in Cachan is driven first of all by its position. The commune touches Arcueil and Villejuif, the porte d'Orléans is a few kilometres away, and the RER B links the station to central Paris in a few stops. Buyers priced out of the capital look first at this southern inner ring, where the square metre stays clearly below the neighbouring Paris districts. The station district has gained around 11 % more inhabitants since 2010 according to Apur, the Paris urban planning agency. The commune's population, for its part, grows little: demand for housing comes above all from the fall in household size, down from 2,26 to 2,11 people between 2012 and 2023.
The second driver is urban renewal. The works on the line 15 South station, at the corner of avenue Carnot and avenue Léon-Eyrolles, come with a development project mixing housing, shops and public spaces. The departure of the École normale supérieure for the Saclay plateau in 2020 also freed a campus taken over by other higher education institutions. Against this, new supply stays constrained: over less than three square kilometres and more than 11 000 inhabitants per km², free plots are rare, and the inter-communal local plan in force since February 2026 frames what can be done. Most sales therefore involve existing homes.
Cachan sits in the middle of the range for the southern inner suburbs. The level is a notch below Bourg-la-Reine, its immediate neighbour, clearly behind Sceaux, and slightly above Villejuif.
The name Cachan is recorded as early as 829, in a charter of Louis the Pious confirming the property of the abbey of Saint-Germain-des-Prés. The territory is marked first of all by water. The Romans ran an aqueduct through it, carrying water gathered to the south towards Lutetia, of which remains survive. In the 17th century, the same valley took in the Médicis aqueduct, meant to supply Paris from Rungis: Louis XIII laid its first stone on 17 July 1613 and the structure came into service on 19 May 1623. The aqueduct bridge crossing the Bièvre between Arcueil and Cachan measures 379 metres for close to 19 metres in height, to plans by Thomas Francine and Louis Métezeau.
The landscape changed in the 19th century. The Sceaux line opened on 7 June 1846 and its station, built on the commune's territory, is today called Arcueil-Cachan. In the 1860s and 1870s, the engineer Eugène Belgrand had the Vanne aqueduct laid above the Médicis arches, hence the two-level silhouette seen from the valley. The local economy then rested on laundering, a largely female trade: 130 laundries were recorded in 1900, and still 75 in 1937. Long attached to Arcueil, Cachan was made an independent commune on 26 December 1922 and elected its first council the following year.
The urban growth of the 20th century left two marks. The garden city, launched on the initiative of Henri Sellier for the low-cost housing office of the Seine department, was built by the architect Louis Feine in three phases, from 1921 to 1930, over six hectares: 151 dwellings, then 123, and finally four blocks of 54 dwellings with a health centre and a co-operative. Judged too sparse after the war, it was demolished between 1961 and 1963 in favour of apartment blocks; only the health centre and nursery pavilions survive. Léon Eyrolles, founder of the École spéciale des travaux publics and mayor from 1929 to 1944, gave the town its public facilities, including the town hall opened in 1935. The École normale supérieure, installed in Cachan in 1956, left the commune in 2020 for the Saclay plateau.
Cachan has 31 103 inhabitants. According to INSEE, the French national statistics institute, the commune totals 15 178 dwellings, of which 93,1 % are main residences and 1,6 % second or occasional homes: people live here all year round, this is not a holiday address. Again according to INSEE, apartments account for 79,9 % of dwellings and houses 16,3 %, and 37,4 % of households own their main residence, against 60,4 % who rent. The average household size fell from 2,26 people in 2012 to 2,11 in 2023. Buyers are therefore above all working households aiming for a first purchase a few RER stops from Denfert-Rochereau, and local tenants who become owners without leaving the town.
The average price recorded for an apartment in Cachan is 4 998 €/m². It is an average calculated on sales registered in the DVF database, fed by notarial deeds, not a theoretical estimate. Houses, far fewer in the commune, form a distinct and narrower market. A property can depart appreciably from that value depending on the floor level, the condition, the aspect and the presence of outdoor space or parking.
The highest values are found around the town centre and the streets close to Arcueil-Cachan station, as well as in the single-family sectors of the Coteau and the Grange-Ory, where houses trade at a premium over flats. The large blocks built in the 1960s, notably on the footprint of the former garden city, stay lower. Relief also plays a part: the streets on the hillside, better exposed, hold above the floor of the Bièvre valley.
Arcueil-Cachan station, opened on 7 June 1846 with the Sceaux line and located on the commune's territory, is served by the RER B: Denfert-Rochereau and Châtelet are a few stops away. Several bus routes link the commune to the stations of metro line 7, at Le Kremlin-Bicêtre and Villejuif. By car, the porte d'Orléans and the A6 motorway are close. This service weighs directly on the value of a home according to its distance from the station.
A Grand Paris Express station is being built in Cachan, at the corner of avenue Carnot and avenue Léon-Eyrolles, under the RER B tracks, with entrances on either side of the current station. It is sized for traffic that may reach 95 000 passengers a day and will put Créteil or Orly around fifteen minutes away. The opening, postponed several times, is announced for 2026. An urban project accompanies the works around the station.
Cachan belongs to the Grand-Orly Seine Bièvre territorial authority. The inter-communal local plan, approved on 16 December 2025 and in force since 21 February 2026, covers the 24 communes of the territory and sets heights, building footprints and parking rules. The commune is also among the sectors concerned by the risk of ground movement linked to former underground quarries, the subject of a prevention plan put to public consultation from 3 June to 4 July 2025. Check both points before a purchase or before any works.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).