Opinions were offered in this thread, on what sounds like the same question.
https://www.winnipesaukee.com/forums...ad.php?t=20741
I found the DES fact sheet on
new docks quite interesting, and very clear about allowable dock placement such that a docked boat ("slip")doesn't violate abutter's lake space. But this is quite specific to new docks, and grandfathered behavior and neighbor relations are always weighty considerations.
https://www.des.nh.gov/sites/g/files...0-01/wb-19.pdf