Population: 37,754 inhabitants (+13.1% between 2013 and 2023)
Rental yield in Franconville →
Estimated asking rents — "Carte des loyers" 2025 (French Ministry of Ecological Transition). Gross yield = annual rent / median sale price per sqm.
| Neighborhood | Change | Price/sqm |
|---|
| Neighborhood | Change | Price/sqm |
|---|
| Rate ‰ | France | |
|---|---|---|
| Home burglaries | 3.4 | 3.1 |
| Physical assaults (non-domestic) | 2.4 | 3.2 |
| Vehicle thefts | 1.5 | 1.8 |
| Non-violent thefts | 6.8 | 9.1 |
| Vandalism | 7.0 | 7.9 |
Source: SSMSI, French Ministry of the Interior. Offences recorded by police and gendarmerie, per 1,000 inhabitants — unreported offences are not included.
Energy sieves (F+G): 7.2% (France: 9.9%)
| Label | Share |
|---|---|
| A | 0.2% |
| B | 9.1% |
| C | 34.0% |
| D | 32.4% |
| E | 17.2% |
| F | 5.0% |
| G | 2.1% |
Source: ADEME (2026), 8,396 diagnostics performed since July 2021 — share of diagnosed dwellings, not a census of the stock. G banned from rental since 2025, F in 2028, E in 2034.