Anyway, a proper beach lot shrunk ok. Shrink from front of course or else it chops off all the swimmy areas. Of course lot needs to then be moved to the place with the narrower land between the sea and road, otherwise there is a gap between the lot sea and the neighbourhood sea, which looks silly. And you can't place the shrunk lot on a space that would have taken the original lot, because the lot would no longer overlap the water slightly so the game refuses to accept it placed there.

But anyway it was fine for what I wanted, which was to get places you could bathe along my narrow promontary.