Bois-Guillaume · report
Renovation in Bois-Guillaume
In 2025, 35% of the homes authorised were in existing buildings: conversions, extensions and changes of use.
- Homes in existing buildings, 2025
- 35%
Homes authorised in Bois-Guillaume: 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 | 6 | 17 |
| 2024 | 153 | — | 153 |
| 2023 | 538 | 15 | 553 |
| 2022 | 78 | — | 78 |
| 2021 | 73 | 3 | 76 |
| 2020 | 37 | 4 | 41 |
| 2019 | 48 | 3 | 51 |
| 2018 | 187 | 4 | 191 |
| 2017 | 148 | 10 | 158 |
| 2016 | 18 | — | 18 |
| 2015 | 210 | — | 210 |
| 2014 | 92 | — | 92 |
| 2013 | 174 | 13 | 187 |
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 Bois-Guillaume
At the median sale price, a 90 m² home costs €263,070. With 10% down and a 30-year mortgage, the payment is €1,024 a month. The HCSF caps it at 35% of a household's income.
- Payment, two incomes
- 17%
- Payment, one income
- 34%
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
- €1,217
- Owning per month
- €885
Figures for Seine-Maritime: Bois-Guillaume 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 grew by 42 while 15 homes were started: 2.8 new residents for every new home.
- New residents per new home, 2022
- 2.8
- Population change, 2022
- +42
5.0% of the 7,002 homes counted in the 2023 census stood empty, whether for sale, to let or for other reasons.
- Empty, 2023 census
- 5.0%
- Empty homes
- 348
Public bodies signed €171.6K of housing works here in 2025, and €171.6K since 2024.
- Signed in 2025
- €171.6K
- Per resident, 2025
- €12