Ollainville (91) · report
Renovation in Ollainville (91)
In 2025, 0% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 0%
Homes authorised in Ollainville (91): 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 | 5 | — | 5 |
| 2024 | 48 | — | 48 |
| 2023 | 2 | 11 | 13 |
| 2022 | 20 | 1 | 21 |
| 2021 | 15 | 5 | 20 |
| 2020 | 90 | 2 | 92 |
| 2019 | 71 | — | 71 |
| 2018 | 72 | — | 72 |
| 2017 | 197 | 2 | 199 |
| 2016 | 57 | 2 | 59 |
| 2015 | 29 | — | 29 |
| 2014 | 43 | — | 43 |
| 2013 | 39 | 1 | 40 |
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 Ollainville (91)
At the median sale price, a 90 m² home costs €282,960. With 10% down and a 30-year mortgage, the payment is €1,101 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 22%
- Payment, one income
- 44%
Figures for Essonne: Ollainville (91) has no reliable figures of its own.
33.7% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 5,659
In 2022 the population grew by 94 while 43 homes were started: 2.2 new residents for every new home.
- New residents per new home, 2022
- 2.2
- Population change, 2022
- +94
4.2% of the 2,120 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 4.2%
- Empty homes
- 88