Petit-Mars · report
Renovation in Petit-Mars
In 2025, 43% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 43%
Homes authorised in Petit-Mars: 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 | 4 | 3 | 7 |
| 2024 | 2 | 3 | 5 |
| 2023 | 5 | 6 | 11 |
| 2022 | 10 | 6 | 16 |
| 2021 | 10 | 3 | 13 |
| 2020 | 22 | 1 | 23 |
| 2019 | 38 | — | 38 |
| 2018 | 45 | 3 | 48 |
| 2017 | 34 | 2 | 36 |
| 2016 | 15 | 1 | 16 |
| 2015 | 26 | 3 | 29 |
| 2014 | 5 | — | 5 |
| 2013 | 7 | 1 | 8 |
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 Petit-Mars
At the median sale price, a 90 m² home costs €220,680. With 10% down and a 30-year mortgage, the payment is €859 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 19%
- Payment, one income
- 37%
Figures for Loire-Atlantique: Petit-Mars has no reliable figures of its own.
13.1% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 10,457
In 2022 the population grew by 23 while 14 homes were started: 1.6 new residents for every new home.
- New residents per new home, 2022
- 1.6
- Population change, 2022
- +23
4.1% of the 1,591 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 4.1%
- Empty homes
- 66