Seeki.eu lists 500+ properties for sale and 600+ to rent in Chamberí.
The median asking price is €996,000, or €9,222 per m² on a typical 111 m², across sale listings that publish both a price and a floor area.
On the rental side, the median asking rent for an apartment is €2,200 a month, across apartment rentals that publish both a price and a floor area.
