Grigny (91) · report
Renovation in Grigny (91)
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 Grigny (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 | 2 | 7 |
| 2024 | 63 | — | 63 |
| 2023 | 103 | 1 | 104 |
| 2022 | 64 | — | 64 |
| 2021 | 92 | — | 92 |
| 2020 | 5 | — | 5 |
| 2019 | 214 | — | 214 |
| 2018 | 69 | 6 | 75 |
| 2017 | 29 | — | 29 |
| 2016 | 3 | 1 | 4 |
| 2015 | 3 | — | 3 |
| 2014 | 2 | 1 | 3 |
| 2013 | 1 | — | 1 |
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 Grigny (91)
At the median sale price, a 90 m² home costs €107,640. With 10% down and a 30-year mortgage, the payment is €419 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 15%
- Payment, one income
- 31%
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
- €1,398
- Owning per month
- €358
Figures for Essonne: Grigny (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 342 while 4 homes were started: 85.5 new residents for every new home.
- New residents per new home, 2022
- 85.5
- Population change, 2022
- +342
10.2% of the 10,175 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 10.2%
- Empty homes
- 1,039