Seine-Maritime · report
Renovation in Seine-Maritime
In 2025, 12% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 12%
Homes authorised in Seine-Maritime: 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 | 4,754 | 669 | 5,423 |
| 2024 | 4,123 | 697 | 4,820 |
| 2023 | 5,042 | 700 | 5,742 |
| 2022 | 5,773 | 644 | 6,417 |
| 2021 | 5,185 | 714 | 5,899 |
| 2020 | 5,643 | 729 | 6,372 |
| 2019 | 5,452 | 639 | 6,091 |
| 2018 | 5,774 | 583 | 6,357 |
| 2017 | 5,435 | 946 | 6,381 |
| 2016 | 6,489 | 654 | 7,143 |
| 2015 | 5,383 | 564 | 5,947 |
| 2014 | 4,536 | 825 | 5,361 |
| 2013 | 6,339 | 678 | 7,017 |
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 Seine-Maritime
At the median sale price, a 90 m² home costs €193,410. With 10% down and a 30-year mortgage, the payment is €753 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 18%
- Payment, one income
- 36%
25.8% fewer homes were licensed for construction in the last 12 months than in an average year of the past decade.
- Licensed, 12 months
- 4,738
- Per 1,000 residents
- 3.8
In 2022 the population grew by 759 while 5,368 homes were started: 0.1 new residents for every new home.
- New residents per new home, 2022
- 0.1
- Population change, 2022
- +759
7.7% of the 667,137 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 7.7%
- Empty homes
- 51,378
Public bodies signed €13.5M of housing works here in 2025, and €19.3M since 2024.
- Signed in 2025
- €13.5M
- Per resident, 2025
- €11