While the bathroom is small in many houses, you can renovate the room to appear larger without significant construction work. Here are several ideas.
A straightforward option is to use mirrors to expand the area visually. They add depth to the room, even though you know the image on the glass is an illusion. Once you've fitted your grooming mirrors, you can place additional ones strategically around the room. For example, you could hang one opposite a window that looks onto the garden and use the borrowed view of the outside.