Commune · data to June 2026
House prices in Ermont
Homes in Ermont sold for a median €3,980 per m² in the 12 months to June 2026, down 0.8% on the year before. That is the median of 261 sales recorded in property deeds. That is higher than in 87% of communes.
- Median sale price per m²
- €3,980/m²
- Change in a year
- −0.8%
- Apartments
- €3,732/m²
- Houses
- €4,396/m²
- land included
- Sales in 12 months
- 261
Ermont: −4.9% in 4 years
Median sale price per m², over the 12 months to each quarter
- Ermont
- Val-d'Oise
- France
Show the numbers
| Quarter | Ermont | Val-d'Oise | France |
|---|---|---|---|
| Q2 2026 | €3,980/m² | €3,355/m² | €2,605/m² |
| Q1 2026 | €4,021/m² | €3,372/m² | €2,588/m² |
| Q4 2025 | €3,937/m² | €3,390/m² | €2,589/m² |
| Q3 2025 | €3,989/m² | €3,419/m² | €2,581/m² |
| Q2 2025 | €4,013/m² | €3,423/m² | €2,564/m² |
| Q1 2025 | €3,967/m² | €3,441/m² | €2,559/m² |
| Q4 2024 | €4,051/m² | €3,442/m² | €2,542/m² |
| Q3 2024 | €4,015/m² | €3,458/m² | €2,551/m² |
| Q2 2024 | €4,121/m² | €3,495/m² | €2,577/m² |
| Q1 2024 | €4,143/m² | €3,545/m² | €2,610/m² |
| Q4 2023 | €4,189/m² | €3,594/m² | €2,644/m² |
| Q3 2023 | €4,216/m² | €3,661/m² | €2,685/m² |
| Q2 2023 | €4,342/m² | €3,704/m² | €2,704/m² |
| Q1 2023 | €4,417/m² | €3,717/m² | €2,696/m² |
| Q4 2022 | €4,383/m² | €3,708/m² | €2,675/m² |
| Q3 2022 | €4,315/m² | €3,675/m² | €2,627/m² |
| Q2 2022 | €4,185/m² | €3,636/m² | €2,566/m² |
Reports for Ermont
Each report opens the full series and the assumptions behind these figures.
At the median sale price, a 90 m² home costs €358,200. With 10% down and a 30-year mortgage, the payment is €1,394 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 30%
- Payment, one income
- 60%
Owning a 90 m² apartment costs less each month than renting it. Owning counts interest, running costs and the return the deposit could earn, at apartments' median sale price; rent is the asking rent. Repaying the loan is saving, so it is left out.
- Rent per month
- €1,714
- Owning per month
- €1,229
Figures for Val-d'Oise: Ermont has no reliable figures of its own.
32.3% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 4,869
In 2022 the population grew by 300 while 176 homes were started: 1.7 new residents for every new home.
- New residents per new home, 2022
- 1.7
- Population change, 2022
- +300
3.0% of the 13,233 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 3.0%
- Empty homes
- 401
In 2025, 43% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 43%
Other communes in Val-d'Oise
| Commune | Median sale price per m² | In a year |
|---|---|---|
| Enghien-les-Bains | €5,114 | +4.5% |
| Cormeilles-en-Parisis | €4,422 | −10.0% |
| L'Isle-Adam | €4,132 | −5.1% |
| Bezons | €4,069 | −9.1% |
| Ermont | €3,980 | −0.8% |
| Eaubonne | €3,878 | −2.6% |
| Montmorency | €3,841 | −6.9% |
| Saint-Leu-la-Forêt | €3,796 | −0.2% |
| Herblay-sur-Seine | €3,736 | −1.0% |
| Deuil-la-Barre | €3,700 | −0.5% |
| Soisy-sous-Montmorency | €3,672 | +1.7% |
| Sannois | €3,667 | −2.0% |
| Saint-Gratien (95) | €3,622 | −2.3% |
| Osny | €3,532 | +3.1% |
| Argenteuil | €3,385 | +0.5% |
| Montigny-lès-Cormeilles | €3,381 | −6.3% |
| Éragny-sur-Oise | €3,367 | −0.4% |
| Taverny | €3,306 | −0.4% |
| Saint-Brice-sous-Forêt | €3,292 | −2.5% |
| Saint-Ouen-l'Aumône | €3,267 | +3.6% |
| Domont | €3,212 | +7.8% |
| Franconville (95) | €3,190 | −2.4% |
| Pontoise | €3,160 | −3.3% |
| Goussainville (95) | €3,125 | −2.1% |
| Cergy | €3,092 | −1.1% |
| Jouy-le-Moutier | €3,051 | −2.7% |
| Gonesse | €2,997 | −2.8% |
| Garges-lès-Gonesse | €2,491 | +4.3% |
| Villiers-le-Bel | €2,456 | −15.9% |
| Sarcelles | €2,049 | −1.6% |
The 30 with the most sales, of 74 with a published median.