A foreign guest who does not require a visa may stay in the Netherlands for a maximum of 90 days and must then leave our country for a minimum of 90 days before he or she may re-enter. This rule applies to the entire Schengen area.
How long is a Schengen visa valid for?
A short-stay Schengen visa allows you to stay in the Schengen area for a maximum of 90 days (within a period of 180 days). You always get a visa for a certain period. It can also be shorter than 90 days. As long as your visa is valid, you can travel freely between the 26 Schengen countries.
Extending a Schengen visa in the Netherlands
Extending a short-stay Schengen visa, if you are already staying in the Netherlands, is not possible just like that. An exception is only made in very special cases, such as serious illness in which the foreign national subject to the visa requirement cannot travel.
Can I extend a Schengen visa?
And extending a Schengen visa is only possible in very exceptional situations and strict conditions also apply. If you want to extend a Schengen visa because you would like it if your guest stays a little longer in the Netherlands, then you don't have to create any illusions. Unfortunately that will not work.