De or het terrasvergunning?

The correct Dutch article is:

de terrasvergunning

Rule Words ending in -ing: almost always de. See the rule

How to use terrasvergunning

the terrasvergunningde terrasvergunning
this terrasvergunningdeze terrasvergunning
that terrasvergunningdie terrasvergunning
our terrasvergunningonze terrasvergunning
your terrasvergunningjouw terrasvergunning
every terrasvergunningelke terrasvergunning
which terrasvergunning?welke terrasvergunning?
a big terrasvergunning / the big terrasvergunningeen grote terrasvergunning, de grote terrasvergunning