Houilles · report
Renovation in Houilles
In 2025, 92% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 92%
Homes authorised in Houilles: 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 | 16 | 176 | 192 |
| 2024 | 55 | 55 | 110 |
| 2023 | 57 | 12 | 69 |
| 2022 | 33 | 8 | 41 |
| 2021 | 168 | 1 | 169 |
| 2020 | 237 | 1 | 238 |
| 2019 | 177 | 8 | 185 |
| 2018 | 106 | 21 | 127 |
| 2017 | 533 | 10 | 543 |
| 2016 | 286 | 11 | 297 |
| 2015 | 338 | 12 | 350 |
| 2014 | 178 | 11 | 189 |
| 2013 | 115 | 51 | 166 |
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 Houilles
At the median sale price, a 90 m² home costs €437,850. With 10% down and a 30-year mortgage, the payment is €1,704 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 30%
- Payment, one income
- 59%
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
- €1,908
- Owning per month
- €1,415
Figures for Yvelines: Houilles 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 366 while 180 homes were started: 2.0 new residents for every new home.
- New residents per new home, 2022
- 2.0
- Population change, 2022
- +366
5.4% of the 15,703 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 5.4%
- Empty homes
- 851