The built in bath is a timeless addition to the family bathroom due to its affordability and practical design. A built in bath must be installed against a wall or within a pre-made frame built into the wall with tiles covering the edges. The tiled edge also makes a built in bath ideal for a bath/shower combo as it holds the run-off water. This is great news if you have a smaller space to work with, as you can still enjoy the luxury of a tub in a limited space.