Is a backsplash just finish work here?
Usually, yes. Santa Monica's own permit exemptions list finish work, and swapping tile on a wall that stays where it is falls under that in most kitchens. The city keeps its own exemption list, though, so a job that goes past tile is a different story.
Putting the same outlets back in the same boxes is fine. Moving them is a permit. When a kitchen sits in a gray area, we ask Building & Safety before anyone opens a wall.
