Poissy · report
Renovation in Poissy
In 2025, 4% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 4%
Homes authorised in Poissy: 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 | 128 | 5 | 133 |
| 2024 | 1 | 67 | 68 |
| 2023 | 80 | 9 | 89 |
| 2022 | 76 | 361 | 437 |
| 2021 | 662 | 5 | 667 |
| 2020 | 269 | 5 | 274 |
| 2019 | 334 | 3 | 337 |
| 2018 | 112 | 5 | 117 |
| 2017 | 156 | 3 | 159 |
| 2016 | 907 | 6 | 913 |
| 2015 | 369 | 27 | 396 |
| 2014 | 85 | 17 | 102 |
| 2013 | 270 | 23 | 293 |
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 Poissy
At the median sale price, a 90 m² home costs €345,690. With 10% down and a 30-year mortgage, the payment is €1,345 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
- €1,720
- Owning per month
- €1,224
Figures for Yvelines: Poissy has no reliable figures of its own.
12.7% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 7,492
In 2022 the population grew by 191 while 213 homes were started: 0.9 new residents for every new home.
- New residents per new home, 2022
- 0.9
- Population change, 2022
- +191
5.1% of the 19,344 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 5.1%
- Empty homes
- 989