Measure the bathroom area. Take into account any alcoves, built-in linen closets, recessed shower areas and other odd shapes in the room.
Sketch the bathroom on a piece of graph paper. Use the measurements and the squares on the graph paper to make it a scale drawing.
Mark any built-in items on the drawing if they will stay. Also mark the door, windows, electrical outlets, lighting fixtures and plumbing connections as a reference on the floor plan.
List all of the fixtures you want to place in the bathroom, such as your toilet, shower, tub, vanity, mirror, lighting fixtures, laundry chute, linen closet and any other specialty items you're adding to the room.
Choose locations for the big fixtures including the shower, bathtub, toilet and vanity. Consider the plumbing locations if you're remodeling an existing bathroom. If you're starting from scratch, consider the best flow for the room. Make sure there is enough space around each item for easy use of the room.
Add in the smaller fixtures in the room such as the lighting, towel bars and other items with flexible placement. Consider the location of these fixtures in relation to the other items in the room. For example, you'll want the towel bar near the shower and lighting fixtures above the vanity to provide task lighting.
Mark the footprint of each item on the current bathroom floor to get a sense of the layout. Pieces of painter's tape work well to mark the shape and size of the items on the floor. You can also cut out pieces of cardboard to represent each item. Check the flow of the room and make adjustments as necessary.