Seeki.eu lists 1,500+ properties for sale and 15+ to rent in Groningen.
The median asking price is €412,500, or €3,238 per m² on a typical 128 m², across sale listings that publish both a price and a floor area.
On the rental side, the median asking rent for a house is €1,800 a month, across house rentals that publish both a price and a floor area.