Property Valuation (WOZ)
Every year the municipality determines the value of immovable property (house, building, plot or land). This is called the WOZ value. We use this value to calculate the water tax, property tax (OZB) and the notional rental value for owner-occupied homes, for example.
The Belastingsamenwerking Gemeenten en Waterschappen Limburg (BsGW) performs this for the municipality of Heerlen. They will send you a WOZ assessment every year in February. And they will help you if you disagree with the established value.