DES permits for a deck???

[FlyingScot]

Originally Posted by Heaven

I believe they would rather see you extend the deck, which is still permeable, than build a nonpermeable patio, perhaps

https://www.des.nh.gov/protected-shoreland-faq#faq30916
Projects involving changes in the dimension of an attached deck require a shoreland impact permit or permit by notification. New decks may be added to nonconforming primary structures and existing decks may be expanded, provided they extend no more than 12 feet towards the reference line from the surface of the primary structure to which they are attached.

I followed your very helpful link. It says no decks unless they are "designed to absorb or infiltrate water". Maybe another reader knows how to design a deck that will absorb or infiltrate...