Gambais · report
Renovation in Gambais
In 2025, 67% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 67%
Homes authorised in Gambais: 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 | 2 | 3 |
| 2024 | 2 | — | 2 |
| 2023 | 3 | 2 | 5 |
| 2022 | 9 | 1 | 10 |
| 2021 | 23 | 3 | 26 |
| 2020 | 6 | 1 | 7 |
| 2018 | 5 | 2 | 7 |
| 2017 | 10 | 7 | 17 |
| 2016 | 5 | — | 5 |
| 2015 | 13 | — | 13 |
| 2014 | 4 | 4 | 8 |
| 2013 | 12 | 1 | 13 |
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 Gambais
At the median sale price, a 90 m² home costs €275,760. With 10% down and a 30-year mortgage, the payment is €1,073 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 18%
- Payment, one income
- 35%
Figures for Yvelines: Gambais 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 61 while 15 homes were started: 4.1 new residents for every new home.
- New residents per new home, 2022
- 4.1
- Population change, 2022
- +61
4.2% of the 1,155 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 4.2%
- Empty homes
- 49