Seeki.eu lists 550+ properties for sale and 650+ to rent in Chamberí.
The median asking price is €995,000, or €9,130 per m² on a typical 110 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.