Jack Symon rambled on about something in
:

I have built a deck on my house without getting a building permit.
Does anyone know what kind of penalties I can face?

It varies from town to town. Here, I would need one for any changes
(Addon, removal, or changing an existing structure), but not to
repair an existing structure. At my brothers, you don't need one for
a deck, but you do need one for everything else.

I would suggest checking into the rules for your area...

NOI