Spain's Notaries Just Published Real Sale Prices, Not Asking Prices
3 September 2026
Notaries are a legal entity in Spain involved in every property sale, no transfer of ownership is valid without one witnessing and authorising the deed. What's never come out of that position, unlike in most other countries, is the actual price a property sold for. Spain has had plenty of asking-price data over the years, but almost nothing on real, completed sale prices. The Consejo General del Notariado (Spain's General Council of Notaries) has now launched a portal that starts to close that gap.
What the portal actually gives you
The Portal Estadístico del Notariado is free and public. The part that matters here is its house price finder, an interactive map, built directly from the sale deeds notaries themselves authorise, updated monthly. Draw or search an area and it returns four numbers, all based on real completed transactions rather than what a property was listed at:
Average price per m²
The headline figure: what a property actually sold for, per square metre, in the area you've searched, not what it was listed at.
Average property size
The average surface area of the properties behind that price, so a m² figure can be read alongside a realistic total.
Average total price
The average full sale price for the area, derived from the same underlying deeds.
Number of transactions
How many sales the figures are actually based on, so you can judge how much weight to put on a given area's numbers.
The catch: municipality level, not street level
You can search national, regional, provincial, and municipal levels, plus postal code and a custom-drawn area. You cannot get down to an individual street, or a specific transaction, only an area-wide average per municipality (or postcode/custom zone). That means it's an indicator of what's actually happening in a given municipality, not a per-property valuation tool.
That's still a meaningful gain. An average-per-m² figure grounded in real notarised sale prices, even at municipality level, is a genuine check against asking-price data, which is all most buyers and agents have ever had to go on in Spain.
What's next
There's no API or data feed yet, the portal is browser-only. It's not confirmed, but the Notariat have indicated an API may follow in future, which would open the door to incorporating this data at a more granular level than the map alone allows. Nothing to build against yet, but worth watching.
For now, if you want a real-sale-price sanity check on a municipality you're looking at, it's worth a look alongside our own Market Intelligence and Price Search Report tools.
Source: Portal Estadístico del Notariado.