Real estate prices in Guyancourt in 2026

In October 2026, the average real estate price in Guyancourt was 3,996 € per square meter for all properties combined. Apartments saw a modest increase of 0.38% over one year, while house prices fell by 2.20%. The average price for apartments was 4,024 €/m², compared to 3,918 €/m² for houses.

Cost of specific properties

A 70 m² apartment would cost approximately 281,680 €, while an 89 m² house would cost around 348,702 €, not including acquisition costs. Over one month, apartment prices rose by 0.03%, while house prices dropped by 1.00%. Over three months, apartment prices fell by 2.22%, while house prices increased by 0.18%.

Long-term trends and rental costs

Over five years, apartment prices dropped by 5.51%, and house prices declined by 9.98%. The average rent per square meter for apartments was 19.2 €/m², and for houses, 22.5 €/m². A 70 m² apartment would have an average monthly rent of about 1,342 €, and an 89 m² house would cost around 1,577 €, excluding additional charges.

Population and housing statistics

Guyancourt has a population of 29,406 inhabitants. Houses make up 23.9% of housing stock, and 40.1% of residents are owner-occupiers. Only 2.4% of properties are second homes, indicating that most housing is for primary residence.

Sector-specific price variations

Different areas within Guyancourt show significant price differences. The Villaroy area had the highest average price for all properties at 4,183 €/m², while the Pont du Routoir sector had the lowest at 3,687 €/m². Other areas like Les Garennes and l'Europe also showed higher prices compared to the overall average.

Transport and educational facilities

Transport in Guyancourt includes bus networks and links to Saint-Quentin-en-Yvelines railway hubs, managed by Île-de-France Mobilités. The town has several public educational institutions, including maternelles, élémentaires, primaires, and collèges, offering education from early childhood through secondary school.

Purchasing power and loan capacity

The median annual income in Guyancourt is 42,747 €, with a maximum effort rate of 35% for housing expenses, including insurance. A 20-year mortgage at 3.54% would allow a loan of 205,398 €, sufficient for a 51 m² apartment or a 52 m² house. Extending the loan period to 25 years at 3.61% increases the capacity to 234,563 €, covering a 58 m² apartment or 60 m² house.

Rental affordability

On the rental market, a budget of one-third of the monthly income would allow for about 1,187 € per month, which could cover approximately 62 m² of an apartment at the average communal rent. This highlights the relationship between income levels and housing affordability in the area.