Herblay-sur-Seine · report
Renovation in Herblay-sur-Seine
In 2025, 30% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 30%
Homes authorised in Herblay-sur-Seine: new buildings and existing ones
Dwellings authorised each year, by the year the permit was granted: in new buildings, and by works on existing buildings (conversions, extensions, changes of use). SDES Sitadel.
- Existing buildings
- New buildings
Show the numbers
| Year | New buildings | Existing buildings | Total |
|---|---|---|---|
| 2025 | 14 | 6 | 20 |
| 2024 | 13 | 3 | 16 |
| 2023 | 62 | 6 | 68 |
| 2022 | 114 | 5 | 119 |
| 2021 | 11 | 6 | 17 |
| 2020 | 220 | 6 | 226 |
| 2019 | 49 | 15 | 64 |
| 2018 | 142 | 4 | 146 |
| 2017 | 216 | 5 | 221 |
| 2016 | 388 | 2 | 390 |
| 2015 | 316 | 2 | 318 |
| 2014 | 374 | — | 374 |
| 2013 | 116 | 4 | 120 |
Only permits that create dwellings are listed, so renovation that adds no home (refurbishing, insulating, re-roofing) is not counted. A permit is permission to build, not a finished home. The current year is left out until it is complete.
Other reports for Herblay-sur-Seine
At the median sale price, a 90 m² home costs €336,240. With 10% down and a 30-year mortgage, the payment is €1,309 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 26%
- Payment, one income
- 52%
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
- €1,763
- Owning per month
- €1,176
Figures for Val-d'Oise: Herblay-sur-Seine 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 fell by 39 while 185 homes were started.
- Homes started, 2022
- 185
- Population change, 2022
- −39
9.5% of the 13,379 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 9.5%
- Empty homes
- 1,269