Crolles · report
Renovation in Crolles
In 2025, 7% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 7%
Homes authorised in Crolles: 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 | 41 | 3 | 44 |
| 2024 | 24 | — | 24 |
| 2023 | 8 | 3 | 11 |
| 2022 | 249 | — | 249 |
| 2021 | 31 | 11 | 42 |
| 2020 | 215 | 3 | 218 |
| 2019 | 231 | — | 231 |
| 2018 | 83 | — | 83 |
| 2017 | 8 | 3 | 11 |
| 2016 | 34 | 2 | 36 |
| 2015 | 61 | — | 61 |
| 2014 | 12 | 2 | 14 |
| 2013 | 46 | 2 | 48 |
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 Crolles
At the median sale price, a 90 m² home costs €345,960. With 10% down and a 30-year mortgage, the payment is €1,347 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 26%
- Payment, one income
- 52%
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
- €1,389
- Owning per month
- €1,273
Figures for Isère: Crolles has no reliable figures of its own.
31.7% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 6,432
In 2022 the population grew by 146 while 71 homes were started: 2.1 new residents for every new home.
- New residents per new home, 2022
- 2.1
- Population change, 2022
- +146
4.0% of the 3,893 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 4.0%
- Empty homes
- 157