Seeki.eu lists 2,000+ properties for sale and 15+ to rent in Groningen.
The median asking price is €400,000, or €3,248 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 €1,725 a month, across house rentals that publish both a price and a floor area.