Yes - the Lot Adjuster works for that. I have BV, so when I do that, I tick the "Is beach lot" box, at the same time as adding the land.
So... I don't know what it would do if you didn't have BV? At the very least, make sure the terrain is set to match the neighborhood - NOT flat.
Good luck!


Exactly what @simsample said. (And that grid view is freaky! )
You can use the NeighborhoodTerrain cheat right over roads, and raise/lower the whole island. You just can't use it on already placed lots. The area needs to be free of all lots.

I have a tip about how to create smooth beach lots at the beginning of my Build a Pier workshop video. (Cue it up around 4 minutes.) Now... that is for a different hood, but the same idea will work for your island too.

To get your beach lots lower - on your custom hood - I would start with the one place the beach lot did place, and work from there.

I downloaded a small, but sumptuously furnished house by angellasimmer. The house came with a gnome standing by the front door. I placed the house near the sea end of Woodland Drive in Pleasantview, and moved two Sims (an adult Kiera Neville, and a teenage boy Lorian McNeill) into it. I understand that Keira has been asked to look after Lorian. On Wednesday evening Jennifer Burb came for dinner. While dinner was being served, Jennifer slipped outside and stole the gnome! She then went back in, enjoyed her dinner, and eventually went home, with the good wishes of Keira and Lorian, but no doubt with their gnome stuffed into her inventory.

Believe it or not, this is the first time a gnome has been stolen in my game, and I don't know what to expect next. When I play the Burbs, should I expect Jennifer to get the gnome out and stand it up somewhere? And then should I expect Keira or Lorian to come round to steal it back? Should I do anything? Or should I leave it up to my Sims to sort this matter out among themselves? Such a thing has never happened in my game before, and I just don't know what, if anything, to do!