Conflans-Sainte-Honorine · report
Renovation in Conflans-Sainte-Honorine
In 2025, 29% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 29%
Homes authorised in Conflans-Sainte-Honorine: 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 | 41 | 17 | 58 |
| 2024 | 16 | 5 | 21 |
| 2023 | 15 | 10 | 25 |
| 2022 | 342 | 4 | 346 |
| 2021 | 56 | 2 | 58 |
| 2020 | 68 | 60 | 128 |
| 2019 | 276 | 5 | 281 |
| 2018 | 81 | 3 | 84 |
| 2017 | 125 | 1 | 126 |
| 2016 | 110 | 17 | 127 |
| 2015 | 23 | 13 | 36 |
| 2014 | 59 | 12 | 71 |
| 2013 | 76 | 27 | 103 |
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 Conflans-Sainte-Honorine
At the median sale price, a 90 m² home costs €349,380. With 10% down and a 30-year mortgage, the payment is €1,360 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 26%
- Payment, one income
- 53%
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
- €1,648
- Owning per month
- €1,089
Figures for Yvelines: Conflans-Sainte-Honorine 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 652 while 156 homes were started: 4.2 new residents for every new home.
- New residents per new home, 2022
- 4.2
- Population change, 2022
- +652
5.2% of the 15,970 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 5.2%
- Empty homes
- 829