Seeki.eu lists 4+ properties for sale and 3+ to rent in Mutriku.
The median asking price is €990,000, or €4,500 per m² on a typical 220 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 €1,500 a month, across apartment rentals that publish both a price and a floor area.
