Population: 30,689 inhabitants (-3.7% between 2013 and 2023)
Rental yield in Le Chesnay-Rocquencourt →
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 | 4.2 | 3.1 |
| Physical assaults (non-domestic) | 1.7 | 3.2 |
| Vehicle thefts | 0.9 | 1.8 |
| Non-violent thefts | 7.3 | 9.1 |
| Vandalism | 5.3 | 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): 8.1% (France: 9.9%)
| Label | Share |
|---|---|
| A | 0.1% |
| B | 0.5% |
| C | 24.9% |
| D | 40.3% |
| E | 26.0% |
| F | 6.0% |
| G | 2.1% |
Source: ADEME (2026), 7,640 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.