[Descant]

If I read everything correctly, the OP says his family has been in this place since 1969 and he acquired it in 2018. There was also a statement that the neighbor's roll in dock was an existing structure. To me, a temporary seasonal dock is not a structure, although it can be registered with DES. Even so, when registering, it should meet lot line (extension) setbacks. So, it appears that something new, that we don't know about, has triggered this issue.
I'm familiar with some other cases where both sides had non-definitive pictures to prove their case. Find a way to get a date. A child in a picture who is now an adult and would affirm that he was that child could get a 40 year old date established. A boat at the dock with a license plate would have a date (remember boat license plates?).


BTW, how much boating do any of us do in November? False issue?