Buying a house in Guyancourt
29,778 inhabitants, Yvelines (78), Île-de-France.
Median price in Guyancourt over five years of DVF: €4,285/m² for houses (292 sales) and €3,942/m² for flats (928 sales). That is 30% above the median of the municipalities of Yvelines. Property tax rate on buildings in 2025: 36.3% (municipality and intercommunality), plus a household waste tax of 5.59%. 27% above the department median (28.54%). Of 9,503 homes in Guyancourt with an energy certificate, 146 are rated F or G (1.5%). Home burglaries recorded in 2025: 3.3 per 1,000 homes, against 5.7 in the department and 5.6 in France. Among the municipalities of Yvelines, Guyancourt ranks 52nd of 254 for the median house price, 48th of 145 for flat prices, 40th of 259 for the property tax rate, 244th of 245 for the share of homes rated F or G. INSEE code 78297, postcode 78280. Nearest municipality: Voisins-le-Bretonneux, 2.5 km away.
Your address in Guyancourt
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Guyancourt in figures
| Indicator | Guyancourt | Yvelines | France |
|---|---|---|---|
| Population | 29,778 | 1,485,086 | - |
| House, median price | €4,285/m² | €3,892/m² | - |
| Flat, median price | €3,942/m² | €4,100/m² | - |
| Property tax (buildings), 2025 rate | 36.3% | 28.54% (median) | 40.3% (median) |
| Household waste tax (TEOM) | 5.59% | - | - |
| Homes rated F or G | 1.5% | 14.4% (median) | 15.4% (median) |
| Burglaries / 1,000 homes | 3.3 | 5.7 | 5.6 |
| Physical violence outside family / 1,000 | 2.5 | 2.3 | 3.2 |
| Criminal damage / 1,000 | 6.3 | 6.3 | 7.9 |
| Transfer duties (department) | 5% | 5% | - |
Questions
What is the price per m² in Guyancourt?
Median price in Guyancourt over five years of DVF: €4,285/m² for houses (292 sales) and €3,942/m² for flats (928 sales). That is 30% above the median of the municipalities of Yvelines.
What is the property tax rate in Guyancourt?
Property tax rate on buildings in 2025: 36.3% (municipality and intercommunality), plus a household waste tax of 5.59%. 27% above the department median (28.54%).
Where does Guyancourt stand in its department?
Among the municipalities of Yvelines, Guyancourt ranks 52nd of 254 for the median house price, 48th of 145 for flat prices, 40th of 259 for the property tax rate, 244th of 245 for the share of homes rated F or G.
How many burglaries in Guyancourt?
Home burglaries recorded in 2025: 3.3 per 1,000 homes, against 5.7 in the department and 5.6 in France.
Municipalities near Guyancourt
| Municipality | House, median | Property tax | Distance |
|---|---|---|---|
| Voisins-le-Bretonneux | €4,500/m² | 39.35% | 2.5 km |
| Montigny-le-Bretonneux | €4,504/m² | 34.25% | 3.6 km |
| Buc | €5,684/m² | 27.26% | 3.7 km |
| Saint-Cyr-l'École | €5,112/m² | 30.17% | 3.7 km |
| Châteaufort | €4,623/m² | 35.15% | 4.3 km |
| Toussus-le-Noble | €4,713/m² | 29.83% | 4.4 km |
Read more: every municipality in Yvelines, the notary fees calculator, what to check before buying.
Sources: INSEE, DVF, REI, SSMSI, ADEME, DGFiP.
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