Price a flat
What it is worth to let or to sell, from what was actually signed in that barri — not from what anyone is asking.
Built area
How this is worked out, and what it does not do
The barri average €/m² from registered rental deposits or registered sales, multiplied by the size you entered. It is deliberately not adjusted for flat size: the obvious model — small flats cost more per m² — does not hold here. Across barris, mean flat size and €/m² correlate at +0.55, which is wealth rather than size, since the barris with big flats are also the expensive ones. Within a single barri over time the median correlation is −0.14, which is nothing usable. So rather than invent a size adjustment, the tool tells you when your flat is far from the stock the average is drawn from.
Registered contracts and sales, Generalitat de Catalunya, to Q1 2026.