Rosny-sous-Bois · report
Renovation in Rosny-sous-Bois
In 2025, 2% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 2%
Homes authorised in Rosny-sous-Bois: 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 | 265 | 6 | 271 |
| 2024 | 226 | 6 | 232 |
| 2023 | 126 | 31 | 157 |
| 2022 | 288 | 169 | 457 |
| 2021 | 177 | 12 | 189 |
| 2020 | 394 | 7 | 401 |
| 2019 | 472 | 15 | 487 |
| 2018 | 997 | 7 | 1,004 |
| 2017 | 472 | 4 | 476 |
| 2016 | 379 | 6 | 385 |
| 2015 | 377 | 12 | 389 |
| 2014 | 219 | 3 | 222 |
| 2013 | 449 | 2 | 451 |
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 Rosny-sous-Bois
At the median sale price, a 90 m² home costs €347,580. With 10% down and a 30-year mortgage, the payment is €1,353 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 33%
- Payment, one income
- 67%
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
- €1,858
- Owning per month
- €1,244
Figures for Seine-Saint-Denis: Rosny-sous-Bois has no reliable figures of its own.
10.1% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 11,995
In 2022 the population grew by 1,233 while 670 homes were started: 1.8 new residents for every new home.
- New residents per new home, 2022
- 1.8
- Population change, 2022
- +1,233
9.9% of the 22,827 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 9.9%
- Empty homes
- 2,263