Real estate prices Guyancourt
In Guyancourt, apartments sell at a median €3,809 per square metre, with 197 sales in twelve months.
The Guyancourt market is read here from the DGFiP record of actual sales, not from asking prices. Apartments carry the local market with 135 sales over twelve months, against 62 houses. Over the last twelve published months the median apartment price moved by -0.3 %. That amounts to stability.
These figures cover all the sales recorded in the commune (INSEE code 78297), under its postal code 78280.
Guyancourt, the town
Guyancourt covers 13 km², lies between 110 and 167 m above sea level and had 29,778 inhabitants in the 2023 census.
Guyancourt (pronounced [gɥi.jɑ̃.kuʁ]) is a French commune situated in the département of Yvelines in the Île-de-France region, 20 km south-west of Paris. It forms part of the communauté d'agglomération de Saint-Quentin-en-Yvelines. The site of the commune was already inhabited in the Neolithic period, according to remains such as arrows, flint scrapers and polished axes, found at Bouviers, Troux and Villaroy.
A little history
The site of the town was already inhabited in the Neolithic period. These first inhabitants left hundreds of remains such as arrows, flint scrapers and polished axes, which were found at Bouviers, Troux and Villaroy. Certain pieces are preserved at the musée d'Archéologie nationale housed in the château de Saint-Germain-en-Laye. Occupation persisted during the Roman period.
Places to see in Guyancourt
- La batterie de Bouviers
- Seven large farms once existed on the territory of Guyancourt
From Wikidata and the Wikipedia article « Guyancourt », licensed CC BY-SA 4.0, read on 13 October 2026. Translated from the French article. Read the article
Market dynamics, Guyancourt
What the sales show in Guyancourt
The median apartment price in Guyancourt stands at €3,809 per square metre. Houses come out at €4,193.
Half of apartment sales in Guyancourt fall between €3,294 and €4,265 per square metre. That gap owes more to condition than to opposing neighbourhoods, as this market does not split into starkly different price zones.
The average apartment sold in Guyancourt covers 67 square metres, putting a typical transaction near €253,342. That is an order of magnitude drawn from averages, not the valuation of any particular property.
Prices by property type in Guyancourt
| Property type | Median price / sq.m | Central range, middle half of sales | Average surface | Sales, 12 months ending 31 December 2025 |
|---|---|---|---|---|
| Studio | €4,810 | €4,538 – €5,606 | 26 m² | 14 |
| T2 | €4,176 | €3,670 – €4,399 | 48 m² | 30 |
| T3 | €3,808 | €3,370 – €4,179 | 66 m² | 39 |
| T4 | €3,508 | €3,210 – €3,956 | 83 m² | 37 |
| T5+ | €3,186 | €2,869 – €3,443 | 102 m² | 15 |
| House | €4,193 | €3,732 – €4,605 | 110 m² | 62 |
Prices by property type in Guyancourt
By property type in Guyancourt, T3 at €3,808/m², T4 at €3,508/m², T2 at €4,176/m², T5+ at €3,186/m², studio at €4,810/m².
The studio carries the highest price per square metre and the T5+ the lowest, a gap of 51 %. Small units usually cost more per square metre than large ones, because the price of a kitchen and a bathroom is spread over fewer metres.
The house is what changes hands most often here, with 62 sales over twelve months. It is therefore the type with the most reference points, and the one where a price is hardest to argue against.
Homes for sale in Guyancourt on BRIVEO
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Selling in Guyancourt
Pricing in Guyancourt starts by placing your property inside the €3,294 to €4,265 band rather than on the median alone. The median describes the middle of the market; condition, floor, outdoor space and energy rating decide where in the band you sit.
With 197 sales a year, Guyancourt absorbs correctly priced properties. An over-ambitious price shows quickly, because buyers have points of comparison.
Briveo values your Guyancourt property from the same DVF file, keeping only sales of comparable properties closest to your address, free of charge and with no obligation, then supports the sale through to the deed.
Buying in Guyancourt
Reading the €3,294 to €4,265 band is a buyer’s main tool in Guyancourt. A property at the bottom is not a bargain and one at the top is not a rip-off, the band measures how different the properties are, not how well they are priced.
Acquisition costs are budgeted on top of the price, around 8 % on an existing property, around 3 % on a new one. These are orders of magnitude; the notary computes the exact amount.
A stable market usually means a negotiation decided by the property itself rather than by any general trend.
Are you an estate agent in Guyancourt?
Briveo recruits independent sales agents in every municipality, in transactions only, under the principal's professional licence, with the pay and the monthly cost stated before signing.
Start with BriveoHow the Guyancourt market is moving
Over the last twelve published months the median apartment price moved by -0.3 %. That amounts to stability. Stability is the most common state of a local market, and it means sellers and buyers agree on price levels.
No five-year reading is available for Guyancourt. The apartment sales we currently use (2023 à 2025) do not go back far enough to compute one, so the long-term direction cannot be stated here.
Among the towns tracked by BRIVEO in the same department, on the median apartment price, Sartrouville sits 3 % below and Versailles 73 % above. Those are the gaps a buyer widening their search area actually meets.
Latest published sales in Guyancourt
The housing sales recorded by the French tax administration in the municipality, newest first, street without number, one dwelling per sale, block sales set aside.
| Date | Type | Surface | Rooms | Price | Price per sq m | Street |
|---|---|---|---|---|---|---|
| 31 December 2025 | Flat | 48 sq m | 2 | €161,000 | €3,354 per sq m | RUE DU QUATORZE JUILLET |
| 30 December 2025 | Flat | 99 sq m | 5 | €440,000 | €4,444 per sq m | RUE JACQUES CHRISTIAN MENGET |
| 30 December 2025 | Flat | 75 sq m | 4 | €278,872 | €3,718 per sq m | BD JEAN JAURES |
| 29 December 2025 | Flat | 96 sq m | 5 | €300,100 | €3,126 per sq m | RUE DES DROITS DE L HOMME |
| 22 December 2025 | Flat | 57 sq m | 3 | €293,225 | €5,144 per sq m | RUE GEORGES ENESCO |
| 19 December 2025 | House | 100 sq m | 3 | €525,000 | €5,250 per sq m | RUE DU MOULIN |
| 17 December 2025 | House | 112 sq m | 5 | €484,000 | €4,321 per sq m | RUE FERNAND LEGER |
| 16 December 2025 | Flat | 124 sq m | 4 | €340,000 | €2,742 per sq m | RUE AMBROISE CROIZAT |
| 15 December 2025 | Flat | 87 sq m | 4 | €289,000 | €3,322 per sq m | RUE DES GRAVIERS |
| 12 December 2025 | Flat | 77 sq m | 4 | €304,500 | €3,955 per sq m | RUE JULES MICHELET |
| 11 December 2025 | Flat | 19 sq m | 1 | €91,190 | €4,799 per sq m | PL SALOMON MALHANGU |
| 11 December 2025 | House | 116 sq m | 5 | €447,000 | €3,853 per sq m | RUE DU 19 MARS 1962 |
| 4 December 2025 | Flat | 69 sq m | 3 | €289,060 | €4,189 per sq m | RUE JACQUES PREVERT |
| 26 November 2025 | Flat | 85 sq m | 4 | €280,000 | €3,294 per sq m | BD PAUL CEZANNE |
| 26 November 2025 | Flat | 65 sq m | 3 | €270,500 | €4,162 per sq m | RUE FRANCK LLOYD WRIGHT |
| 25 November 2025 | Flat | 103 sq m | 5 | €385,000 | €3,738 per sq m | BD JEAN JAURES |
| 24 November 2025 | Flat | 85 sq m | 4 | €276,000 | €3,247 per sq m | RUE DE LA LIBERTE |
| 21 November 2025 | Flat | 51 sq m | 2 | €198,500 | €3,892 per sq m | RUE PAUL GAUGUIN |
| 20 November 2025 | Flat | 60 sq m | 3 | €202,500 | €3,375 per sq m | MAIL THERESE DESQUEYROUX |
| 14 November 2025 | Flat | 84 sq m | 4 | €257,000 | €3,060 per sq m | RUE SAINT POL ROUX |
Frequently asked questions, real estate Guyancourt
Q1What is the price per square metre in Guyancourt?
The median apartment price is €3,809 per square metre, read from sales published in the DGFiP DVF record. Houses come out at €4,193.
Q2Are prices rising or falling in Guyancourt?
Over the last twelve published months the median apartment price moved by -0.3 %, which amounts to stability.
Q3How many properties change hands in Guyancourt?
197 sales were recorded over twelve months, 135 apartments and 62 houses.
Q4How much does a T3 cost in Guyancourt?
The median T3 price in Guyancourt is €3,808 per square metre, over 39 sales in twelve months.
Q5What are the acquisition costs in Guyancourt?
Around 8 % of the price on an existing property and around 3 % on a new one. They cover transfer duties, the land registry contribution and the notary’s fees, and the notary computes the exact amount.
Q6How much does a typical property cost in Guyancourt?
The average apartment sold covers 67 square metres, placing a typical transaction near €253,342. Your own property is worth what its condition, location and energy rating make it worth.
Q7How do I get my Guyancourt property valued?
Briveo produces a free valuation from the same DVF file, using sales of comparable properties closest to your address, in about two minutes and with no obligation, then supports the sale through to the deed.
Property prices in the cities tracked by BRIVEO in the same department
Valuation in these cities
Selling in Guyancourt?
In Guyancourt, the median price per sq. m of apartments sold is stable over a year (-0.3 %). The Briveo valuation, free and with no commitment, starts from DVF sales of properties of the same type and similar size, as close to your address as possible.
Of the sales recorded in Guyancourt over twelve months, 69 % are apartments. Sell your house or apartment in Guyancourt with an online estate agency. Sell your property at 0%, 2% or 5%. Publish for free (0%, no mandate), or let BRIVEO sell for you. Fees are due only when the deed is signed. Written mandate compliant with the Hoguet Act, numbered and entered in the register of mandates.
Source and method
- Property transfer records (DVF), published by the French tax authority (DGFiP)
- Sales recorded from 1 January 2023 to 31 December 2025
- Based on 197 sales
- Figures computed on 31 October 2026