Okay, so 5-over-1 is a way to describe a type of building. Buildings can have different shapes, sizes, and designs. It's like how we can have different types of toys, some are big, some are small, and some are round.
Now imagine a building that has five floors or levels, kind of like a stack of five pancakes. Each level has its own purpose, like living spaces or offices or shops.
But what about the "1" part? Well, that refers to the building's exterior (the outside part you see when you look at it from the street). The "1" means that there is only one floor or level of this exterior part, kind of like a big hat that covers the top of the building.
So when someone says "5-over-1 building," they mean a building that has five levels on the inside and one big level on the outside, like a stack of pancakes with a hat on top!