Larger than normal Tiles?

I am making a small Tile based game and I found a possible problem. Each of my Tiles are 64x64 and I’m wondering if its possible to have a single tile larger than it should be? It seems like an rather inefficient method to place each tile individualy. As I plan on having many buildings that would take several hundred tiles which would take hundreds of Classes.

Sorry If this sounds very noobie as although I have used Java for quite a while I have only just started creating JFrames recently