A tile is a single unit of the area of buildings or length of roads. Each tile is a square with a side of 8 meters, making each tile 64 m2. Its display size in pixels is 64x32 (due to isometric angle of view).

Every building has a size in tiles. However, due to the engine used in TheoTown, buildings can only have square plot sizes from 1x1 to 8x8. Larger buildings are not possible, even using plugins.