How we calculate your property's value
The Axia Home valuation model operates in three steps: (1) selecting a baseline price by neighbourhood, property type, and construction period, (2) applying adjustment factors for the property's specific characteristics, and (3) calculating a price range with a confidence score.
The model produces two values: the estimated listing price (what the seller asks in the listing) and the estimated transaction price (what the buyer ultimately pays), which typically differ by 5–12%.
Baseline prices (€/m²) are calculated by:
Each combination (neighbourhood × type × period × room count) maps to a baseline price updated periodically from new listing data.
Positive or negative adjustment coefficients are applied to the baseline price for property-specific features:
| Feature | Price impact |
|---|---|
| Lift | +2% to +4% |
| Balcony | +1% to +3% |
| Parking (garage) | +4% to +8% |
| Storage room | +1% to +2% |
| Energy class A/A+ | +5% to +10% |
| Energy class Z/H | -5% to -10% |
| Sea / harbour view | +8% to +15% |
| Floor level (higher) | +0.5% to +2% per floor |
| Ground floor | -3% to -6% |
| South orientation | +2% to +4% |
| North orientation | -1% to -3% |
| Heat pump | +2% to +4% |
Factors are applied cumulatively with upper and lower bounds to avoid extreme results.
The final result includes a ±8% price range around the central estimate, and a confidence score (0–100%) that depends on:
The model is statistical and does not replace an on-site assessment by a certified appraiser. It does not account for: