De or het kelderberging?

The correct Dutch article is:

de kelderberging

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

How to use kelderberging

the kelderbergingde kelderberging
this kelderbergingdeze kelderberging
that kelderbergingdie kelderberging
our kelderbergingonze kelderberging
your kelderbergingjouw kelderberging
every kelderbergingelke kelderberging
which kelderberging?welke kelderberging?
a big kelderberging / the big kelderbergingeen grote kelderberging, de grote kelderberging