Chargement...
Chargement...
These percentages are working assumptions, not official Observatory coefficients. No MAPE, R², significance or accuracy on real sales has been demonstrated.
Freehold apartments only. Adjustments are internal assumptions, without validation against an independent sales sample. The ±18% range (±25% for asking prices only) is a convention, with no guaranteed accuracy or probability.
Price = municipal mean × (1 + sum of adjustments / 100) × floor area. No individual neighborhood prices. For VEFA, no automatic premium for new condition or energy rating: the VEFA source already reflects that segment.
Published VEFA prices include 3% VAT, subject to the €50,000 tax benefit limit. Adapt this basis if your purchase is ineligible. Parking is a +4% assumption only on the basis excluding annexes; cellars and other annexes are not valued separately.
Period: 1 April 2025 to 31 March 2026 (rolling 12 months). Recorded prices include annexes; the estimator uses adjusted prices excluding annexes where available. Asking prices are not completed sales.
Suppressed prices remain unavailable: fewer than 10 recorded sales or 30 advertisements in these files. Synthetic examples are not comparable sales and do not measure model reliability.
| Parameter | Adjustment |
|---|---|
| Surface < 40 m² | +8 % |
| Surface 40-55 m² | +4 % |
| Surface 55-70 m² | +2 % |
| Surface 90-120 m² | -2 % |
| Surface 120-150 m² | -4 % |
| Surface > 150 m² | -6 % |
| Sous-sol | -12 % |
| RDC | -7 % |
| 1er étage | -3 % |
| 4e-5e étage | +3 % |
| Dernier étage | +5 % |
| Attique / penthouse | +10 % |
| Livré récemment, hors VEFA | +8 % |
| Rénové | +5 % |
| À rafraîchir | -5 % |
| À rénover | -12 % |
| Gros travaux | -20 % |
| Classe énergie A | +5 % |
| Classe énergie B | +3 % |
| Classe énergie C | +1 % |
| Classe énergie E | -3 % |
| Classe énergie F | -6 % |
| Classe énergie G | -10 % |
| Parking intérieur | +4 % |
| Pas d'extérieur | -4 % |
| Grand balcon | +3 % |
| Terrasse | +6 % |
| Jardin | +8 % |
| Terrasse + jardin | +12 % |