Seeki.eu lists 450+ properties for sale and 250+ to rent in Portimão.
The median asking price is €380,000, or €3,357 per m² on a typical 114 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 €1,100 a month, across apartment rentals that publish both a price and a floor area.