For decorating large bathrooms, you can go beyond fundamental style choices and bathroom décor, which you normally consider, then branch out to other kinds of methods of decoration you use for your home. You can start with basic needs of a bathroom then add more items of decoration as they feel fit to you. For your large bathroom choose one color scheme. It should comprise of one basic color, like white or gray and a bold color, such as red, lime green or blue.
You can choose wooden floor and input some greenery in form of some flowers and some green plant to inject a natural feel into your bathroom like this one. As wood is one natural element, makes it blend well into both these basic and bold colors. Install lamps in ceiling in every area in your large bathroom, which you like to highlight, such as shower, sinks, counter space, bathtub, toilet ad vanity set.