How to reuse a grid between scenes

Hello, I am new to unity. In Scene A I have a grid with 4 children (walls, floor, etc) and the scene has a particular layout. I would like to be able to copy that grid (or At least just the children) onto a new scene so I can use the tiles (walls, floor, etc) in the new scene but with a new layout of those said tiles (this scene will look different from scene A). How do I go about doing this? When I made the grid or the children a prefab I ran into a problem of changing the layout in SceneB changed the layout of SceneA. Do I have to manually recreate this grid and it’s children with each new scene?

 

Make a prefab out of the parts which are common and the same in all (both/most/whatever) scenes, bring those into the scenes and create the parts which are different. Since they are need to be different.