This difference is a good clue to the discount required in the market. Idealista projects the seller's price (almost a letter to the Three Wise Men), but Notaries collect the final price, which would be 29% below the offered price.
According to the graphic prepared by spainghousing.eu
- Left axis (line): price of housing in euros per square metre, according to Idealista and the notaries.
- Right axis (area): percentage difference (in absolute value) between the two sources.
Although both trends share similarities, the prices reported by the notaries are systematically behind those listed on Idealista. This discrepancy may be due to the fact that Idealista shows the asking price from the seller, while the notaries reflect the actual transaction price paid by buyers.
The differential (spread) and the sharp change (Sharp) serve to capture trend changes:
- Differential: represented by the grey area (right axis), shows the percentage variation between the two prices. This difference could indicate the level of discount existing in the market.
- Sharp change: represented by the green line, shows fluctuations between the two prices. For example, between 2010 and 2012, several downward movements occur, indicating downward pressure.