Kan ik een huis kopen in Nederland als ik al vastgoed in het buitenland heb?

Yes, owning a house or apartment abroad does not prevent you from buying real estate in the Netherlands. Lenders will ask about any foreign mortgage, rental income or assets, since these affect your borrowing capacity and your box 3 tax position. Property abroad is not an obstacle in itself, and is sometimes even a strength in your application.