Mont-Saint-Aignan · report
Renovation in Mont-Saint-Aignan
In 2025, 3% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 3%
Homes authorised in Mont-Saint-Aignan: 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 | 242 | 7 | 249 |
| 2024 | 3 | 2 | 5 |
| 2023 | 194 | 25 | 219 |
| 2022 | 48 | 9 | 57 |
| 2021 | 135 | 6 | 141 |
| 2020 | 112 | 1 | 113 |
| 2019 | 247 | 3 | 250 |
| 2018 | 73 | 4 | 77 |
| 2017 | 92 | 1 | 93 |
| 2016 | 421 | 6 | 427 |
| 2015 | 197 | 20 | 217 |
| 2014 | 96 | 30 | 126 |
| 2013 | 60 | — | 60 |
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 Mont-Saint-Aignan
At the median sale price, a 90 m² home costs €222,210. With 10% down and a 30-year mortgage, the payment is €865 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 16%
- Payment, one income
- 33%
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
- €1,208
- Owning per month
- €663
Figures for Seine-Maritime: Mont-Saint-Aignan has no reliable figures of its own.
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
In 2022 the population fell by 23 while 136 homes were started.
- Homes started, 2022
- 136
- Population change, 2022
- −23
6.5% of the 11,421 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 6.5%
- Empty homes
- 741