Most of the bathroom companies have a bathroom planning service that will help you work out the layout of your dream bathroom. You can either go to the store and sit down with a bathroom designer and work out your layout.
But there are also websites online that will help you get started with this process. By clicking on a few boxes here and there within a few minutes you can start to get your bathroom layout together which will assist you in your bathroom design process.
For instance the online bathroom planner at http://www.bathroom-guides-planner.com lets you do all this. First you click a shape which represents the shape of you bathroom.
Then you enter the dimensions of your room, and then proceed to add all the individual items in your planned bathroom layout. These include room elements which include windows, doors, internal walls and even people.
Then you can add your fixtures. These include suites, basins, toilets, baths, shower enclosures, furniture and storage and towel rails.
Once completed to your liking you can save your plan or print it off if you require. Have a look and see if it helps you plan your bathroom renovation.