chances are no one would ever bug you about it. But, if it is attached to the house technically you need a permit. If I build a deck for someone I usually get around it by building it slightly off the house. Requires a different design of course.
[quote]What if the deck is not attached to my house, do I still need a building permit? Regardless of whether or not the deck is attached to the house or any other structure on the property, a building permit is required, as noted above.[/quote]