You can use this Bathroom Floor Plan to help you plan a bathroom layout in your home. There are certain rules to follow when designing a bathroom (whether when building new or remodeling). This is a well-designed bathroom that works. Because all plumbing is on one wall, plumbing costs are reduced. This Bathroom Floor Plan is straightforward, efficient, and gets the job done with minimal fuss. However, that efficiency comes at the price of the room's lack of character and limited counter space. It is a bathroom classic that's always a force to be reckoned with.