A fair range, not a guess
Registered sales where they are published, the ministry's appraisals everywhere else, times your flat's cadastral area, moved by its floor, lift, light, noise and energy certificate. Every step shown.

A fair price from public figures, every step shown: what homes sold or were appraised for where it is, set right for your flat. Free, with no agency and no calls.
Registered sales where they are published, the ministry's appraisals everywhere else, times your flat's cadastral area, moved by its floor, lift, light, noise and energy certificate. Every step shown.
The same report a buyer runs on your flat: the cadastre, the certificates, the noise, the sun, the red flags. Know them first, and have the papers ready.
How prices changed in a year where your flat is, from the official quarterly figures, so you price for now and not for last year.
An overpriced flat sits on the portals, gets cut, and sells for less than a fair price would have fetched at the start. Buyers check now, and so do their banks.
homie's estimate from public figures. Not a tasación and not advice.