🏙 Property in Les Mesnuls (78490)

Les Mesnuls has a population of 910, a density of about 139 inhabitants per km². Advertised rents for flats are around €17.4/m² per month (2025). Between 2022 and 2025, advertised rents are up by 7.8%. The overall property tax rate on buildings (taxe foncière) is 20.53% in 2025. The average reference taxable income per household is €74,252 (2024), and 68% of households pay income tax. Les Mesnuls has had 2 natural disaster declarations since 1982, 1 of them for floods or mudslides. The national register lists 2 registered co-ownerships (7 units).

📰 Les Mesnuls at a glance

Département: Yvelines (78) · Region: Île-de-France

Size and profile

Les Mesnuls has a population of 910, a size close to the median for its département (1,302 inhabitants). With 139 inhabitants per km², it has a small-town or fringe profile.

Rents and prices

The advertised rent (€17.4/m² per month) is above the département median (€16.1/m²). Between 2022 and 2025, the advertised rent has risen by 7.8%, more slowly than the département median (11.2%).

Incomes and taxation

The average reference taxable income per household (€74,252 in 2024) is in the top quarter of its département (€48,984). It has risen by 17.0% since 2018, at the same pace as the département median (16.5%). 68% of tax households there pay income tax, against 67% for the median of the municipalities in its département. The overall property tax rate (20.53%) is 8.0 points lower than the département median (28.54%).

Hazards and energy

Les Mesnuls has had 2 natural disaster declarations since 1982, i.e. far fewer than the median of the municipalities in its département (6). A natural risk prevention plan is in force in the municipality.

Summary written automatically from the figures on this page, comparing the municipality with the median of the municipalities in its département (or of France when the département has too few municipalities with data).

💶 Prices and rents: how they have changed

6 listings observed. Estimate calculated across a group of neighbouring municipalities, less precise than a municipal estimate. These are advertised rents, service charges included: they are higher than the rents of existing leases. The estimation method was revised in 2022: only the 2022 and later editions, which are comparable with each other, are shown.

👥 Household incomes

Tax statistics from the DGFiP: income for 2024, declared the following year. The reference taxable income is an average: very sensitive to high incomes, it is not a substitute for a median income. The incomes are those of the tax households living in the municipality, not only those of co-owners.

🌊 Natural hazards

A declaration recognises a state of natural disaster for a given event; it triggers the “natural disasters” cover of home insurance policies and of the building’s insurance. “Drought” declarations relate to the shrinking and swelling of clay soils, a frequent cause of cracks in buildings. A risk statement (état des risques) must in particular be attached to a sale or lease when the property lies in an area covered by a prevention plan, in seismic zone 2 to 5, or with a class 3 radon potential. This page presents municipal data: it does not replace the risk statement drawn up for the property’s address.

🧾 Property tax and local taxation

The overall rate adds the municipal share and the inter-municipal share. The tax due by an owner equals this rate applied to half of the home’s cadastral rental value, reduced where applicable by exemptions.

🏢 The co-ownerships of Les Mesnuls

Budget and arrears are declared by the managing agents to the register; outliers are discarded and the median is used. They are only available for the years in which the register publishes them.

📊 Les Mesnuls compared with neighbouring municipalities

• Advertised rent: 17.4 €/m²/month, rank 3 of 9 municipalities compared, from highest to lowest (neighbours’ median: 17.4 €/m²/month).
• Average reference taxable income: 74,252 €, rank 2 of 9 municipalities compared, from highest to lowest (neighbours’ median: 62,766 €).
• Property tax rate: 20.53 %, rank 9 of 9 municipalities compared, from highest to lowest (neighbours’ median: 24.35 %).

The 8 nearest municipalities (as the crow flies, from the centre). Latest values available; “—”: data not published or too few sales. Rents are estimated for groups of municipalities: neighbours may share the same estimate. The rank compares the municipality with these neighbours, not with the whole of France.

📚 Sources and method

Each indicator comes from an open dataset that is kept over time: when a source is updated or corrected, the old value stays on record, which makes it possible to follow changes from one year to the next.

• Ministère de la Transition écologique, base GASPAR (Géorisques) — Licence Ouverte 2.0. Retrieved in October 2026.
• Carte des loyers © Ministère de la Transition écologique / ANIL — Licence Ouverte 2.0. Retrieved in October 2026.
• INSEE, API Géo (Etalab) — Licence Ouverte 2.0. Retrieved in October 2026.
• ASN / IRSN, potentiel radon des communes — Licence Ouverte 2.0. Retrieved in October 2026.
• DGFiP, impôt sur le revenu par collectivité territoriale (IRCOM) — Licence Ouverte 2.0. Retrieved in October 2026.
• Registre national d'immatriculation des copropriétés (ANAH) — Licence Ouverte 2.0. Retrieved in October 2026.
• DGFiP, fiscalité locale des particuliers — Licence Ouverte 2.0. Retrieved in October 2026.
• Sale prices: single-property sales (flats) in the streets where the register lists co-ownerships; median calculated from 10 sales or more.