↑ House price since 1985, in euros per square meter, according to notaries: nominal price, real price (inflation-adjusted, CPI Base 100 = 1985), and accumulated inflation.
For an overview of housing prices in dollars, gold and bitcoin, see this entry.
↑ Case-Shiller housing index (or IPVVR in Spain): the index is constructed using data from those homes that have been sold at least twice within the study period, using information from the same units at two points in time.
Quarterly evolution of prices
Left axis (line): house price in euros per square meter, according to Idealista and to the notaries.
Right axis (area): percentage of difference (in absolute value) between the two compared price sources.
While both trends share similarities, the notary-reported prices consistently lag behind those listed on Idealista. This variance likely stems from the fact that Idealista represents the seller's asking price, while notaries reflect the actual transaction price paid by buyers.
The Spread and the Sharp change serve as signals to capture trend changes:
Spread: depicted by the grey area (right axis), denotes the difference between the two prices in %. It could hint the level of discount price managed in the market.
Sharp change: represented by the green line, showcases fluctuations between both prices. For example, in 2010-2012, there are a couple of moments when it moves downwards, suggesting that the downward pressure is strong.
Data sources
Housing prices, from 1985 to 2006, according to Sociedad de Tasación (Access to data is under request, but can be seen in the linked publication):
Publication,
Link
Housing prices, from 2007 onwards, according to the notaries (Grupo 5 > Acto 501 - Compraventa inmuebles > Inmuebles en fincas urbanas, viviendas):
Link
Inflation data (Table: average inflation Spain (CPI) - by year):
Link