A small bathroom is a great challenge for every interior designer because he/she needs to be very focused and innovative (Small Bathroom Space Arrangement Creativity).
Space is limited, probably there are some fixed elements you can not change. So, all you can do is to play with the possibilities of taking out the best functionality of them as you can. Especially is difficult if there are installed water pipes and sewerage system.
Then the list of possibilities is shortened and you are obligated to fix those bathroom elements as the plan. But, there are still several smart solutions and bathroom layers that show extra functional small bathroom design.