When you are designing a house, the first sketch is a rough one that comes to your mind. Don’t worry about the measurements, scale, and size of the area. Simply draw what’s in your mind, onto a sheet of paper. The first sketch of your house does not have to be perfect. Jot down the small details of architecture, flooring, and tiling that are in your head.
When you are done writing and drawing what was in your mind, take another paper and use a scale. Consider 1 cm as 50 square feet and use it as your guideline. See if you can fit everything you want in the house. Once a basic sketch is ready, you can talk to the builder.
There are easy to use online applications that allow you to design your custom home. When you are done adding the details, the house should look exactly like the one in your mind. You can use SketchUp, Homestyler, TurboFloorPlan Home & Landscape Deluxe, or Lands Design for designing the layout, furnishing, paint, and anything you want to visualize in your house.