Mercury · report
Renovation in Mercury
In 2025, 39% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 39%
Homes authorised in Mercury: 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 | 11 | 7 | 18 |
| 2024 | 27 | 8 | 35 |
| 2023 | 5 | 26 | 31 |
| 2022 | 16 | 4 | 20 |
| 2021 | 41 | 1 | 42 |
| 2020 | 8 | 1 | 9 |
| 2019 | 24 | 1 | 25 |
| 2018 | 57 | 1 | 58 |
| 2017 | 71 | 1 | 72 |
| 2016 | 74 | 5 | 79 |
| 2015 | 11 | — | 11 |
| 2014 | 10 | 1 | 11 |
| 2013 | 13 | 6 | 19 |
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 Mercury
At the median sale price, a 90 m² home costs €322,650. With 10% down and a 30-year mortgage, the payment is €1,256 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 24%
- Payment, one income
- 48%
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
- €1,253
- Owning per month
- €1,052
Figures for Savoie: Mercury has no reliable figures of its own.
0.7% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 5,181
In 2022 the population grew by 24 while 7 homes were started: 3.4 new residents for every new home.
- New residents per new home, 2022
- 3.4
- Population change, 2022
- +24
7.2% of the 1,739 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 7.2%
- Empty homes
- 125
Public bodies signed €205.3K of housing works here in 2025, and €205.3K since 2024.
- Signed in 2025
- €205.3K
- Per resident, 2025
- €59