Les Clayes-sous-Bois · report
Renovation in Les Clayes-sous-Bois
In 2025, 97% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 97%
Homes authorised in Les Clayes-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 | 1 | 29 | 30 |
| 2024 | 63 | 62 | 125 |
| 2023 | 155 | 90 | 245 |
| 2022 | 157 | 6 | 163 |
| 2021 | 5 | 5 | 10 |
| 2020 | 166 | 1 | 167 |
| 2019 | 125 | 1 | 126 |
| 2018 | 67 | — | 67 |
| 2017 | 117 | — | 117 |
| 2016 | 28 | 2 | 30 |
| 2015 | 12 | — | 12 |
| 2014 | 68 | 3 | 71 |
| 2013 | 9 | 7 | 16 |
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 Les Clayes-sous-Bois
At the median sale price, a 90 m² home costs €306,540. With 10% down and a 30-year mortgage, the payment is €1,193 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 25%
- Payment, one income
- 49%
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
- €1,675
- Owning per month
- €1,003
Figures for Yvelines: Les Clayes-sous-Bois 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 fell by 136 while 199 homes were started.
- Homes started, 2022
- 199
- Population change, 2022
- −136
4.2% of the 7,626 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 4.2%
- Empty homes
- 321