The average price per m² in Guyancourt is 3 806 €/m² for an apartment, based on actual notarised (DVF) sales. About 121 transactions are recorded each year.
Mood illustration of Guyancourt, in the Saint-Quentin-en-Yvelines conurbation.
The average price recorded in Guyancourt stands at 3 806 €/m² for an apartment. That average covers a stock built for the most part from the 1970s onwards, at the time when the new town was created: large collective estates from the first programmes, more recent developments in Villaroy and in the Technocentre sector, and a detached-housing fabric inherited from the original village. Detached houses, rarer but clearly present, trade a little above, at around 4 161 €/m². The values come from the DVF database, which records the transactions actually registered before notaries, and not from theoretical 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 Guyancourt market rests on its double nature: a residential municipality of the new town and a major employment hub of the western Paris region. Demand comes first from families and working households of the Saint-Quentin-en-Yvelines area, drawn by prices more affordable than those of Versailles or of the well-off municipalities nearby, while keeping quick access to Paris and La Défense. The presence of the Technocentre and of the conurbation facilities sustains a steady flow of buyers, with particular tension on three- and four-room apartments and on the houses of the village.
Supply is framed by conurbation planning: large new-build operations are now fewer than at the time when the new town was built, which shifts part of the demand onto the existing stock. As everywhere in Île-de-France, energy performance has become a criterion of negotiation, in particular on the large estates of the 1970s, some of whose dwellings carry unfavourable ratings. Renovated properties, well connected to the T13 tram or close to green spaces, stand out more easily. An up-to-date valuation, based on recent sales in the same sector, remains the best benchmark for placing your property.
Within the Saint-Quentin-en-Yvelines conurbation, Guyancourt sits in the upper middle range of its direct neighbours: above Montigny-le-Bretonneux, Bois-d'Arcy and Élancourt, but markedly below Versailles close by.
Human occupation of the site is very old: the digs carried out at the localities of Bouviers, Troux and Villaroy produced arrowheads, flint scrapers and polished axes that attest a presence from the Neolithic. The Roman period left traces at La Minière, and the church of Saint-Victor keeps Merovingian sarcophagi dated to the end of the 6th century or the beginning of the 7th century. In 1892, a farmer turning over his field unearthed an urn holding several dozen kilos of Roman coins, one of the most spectacular pieces of evidence of that past.
After centuries under the authority of local lords, Guyancourt was attached in 1693 to the Grand Parc of Louis XIV, the vast hunting estate that ringed the château de Versailles. The municipality remained until the middle of the 20th century a small farming village of about 1 500 inhabitants. Its fate changed from 1970 with the development of the new town of Saint-Quentin-en-Yvelines, a planning operation designed from scratch to relieve the Paris conurbation, which today brings together a dozen municipalities.
The recent history of Guyancourt is inseparable from the motor industry. The Renault Technocentre, opened in 1998 in the Villaroy quarter, was built on the former runways of the Caudron-Renault aerodrome created in 1930. That research and development centre, one of the largest in Europe for vehicle design, brings together several thousand engineers and technicians around the central building nicknamed la Ruche, designed by the architects Denis Valode and Jean Pistre. At the other end of the territory, the Golf National, opened in 1990, hosted the Ryder Cup in 2018 and then the events of the 2024 Olympic Games on its Albatros course.
Guyancourt has around 29 778 inhabitants, a population multiplied by close to twenty in half a century, carried by the new town. The housing stock mixes several layers: the first collective estates of the 1970s, the developments of the 1990s built around Villaroy and the Technocentre, an old and recent detached-housing fabric, and a share of social housing inherited from the conurbation programme. Buyers are above all families and working households employed in the Saint-Quentin-en-Yvelines area, among them the staff of the automotive engineering hub, along with households looking for a more affordable alternative to the municipalities of western Paris while staying connected to La Défense and Paris-Montparnasse.
The municipal average comes out at 3 806 €/m² for an apartment, from the sales registered before notaries and published in the DVF database. That figure aggregates very different properties, from the studio in a large estate of the 1970s to the recent apartment in Villaroy. The quarter, the year of construction, the storey, the aspect and the energy performance rating explain most of the gaps. For a specific property, it is better to rely on comparable sales than on the town average alone.
The municipality reads in several sectors with distinct atmospheres. The old village keeps its church of Saint-Victor and a detached-housing fabric. Villaroy, built in the 1990s near the Technocentre, is a more recent residential quarter. The town centre, around the town hall and the shops, concentrates the facilities and a large share of the collective stock. The Bois de Satory and the Bois Cassé bring green breathing space appreciated by families. These sectors do not all sell at the same level.
Guyancourt relies on the Saint-Quentin-en-Yvelines network. The T13 tram serves the municipality and connects to the N and U Transilien lines as well as to the RER C, making it possible to reach Paris-Montparnasse or La Défense in about thirty minutes. The Saint-Quentin-en-Yvelines station, in Montigny-le-Bretonneux, is very close. A bus network completes services inside the conurbation. The car remains widely used, the municipality being linked to the road network of the western Paris region.
Yes, unlike in the denser municipalities of the inner suburbs. The detached-housing fabric of the old village and of more recent estates offers individual houses, which trade at around 4 161 €/m², a little above the collective stock. Sale references remain fewer than for apartments, so that valuing a house depends heavily on its plot, its condition and its location. A reasoned opinion based on comparable properties is useful before setting a price.
Clearly. The Renault Technocentre and, more broadly, the engineering hub of Saint-Quentin-en-Yvelines employ thousands of managers and technicians, some of whom look to live close to their work. That demand from qualified staff supports the market for family apartments and for houses well connected to transport. Conversely, changes in automotive employment can weigh on local momentum, which makes it useful to follow the activity of the area when planning a purchase or a sale.
This analysis is published by Immover, an independent observatory founded by Antony Barbier. Data sourced from official sources (DVF, INSEE, Notaries of France).