Floor plans are usually created by a home designer. However, it does not mean that you cannot draw your own floor plan. It is still possible to do because sometimes other people cannot understand what you want exactly. By drawing your own floor plan, you can tell them what you want without spending much time explaining.
If you do not know how to draw floor plans, you can try to learn how to draw it in scale. First, you need to measure the longest wall. Find out how long the longest wall in the house. Then, make it into a scale so that you can draw it easily on a piece of paper. If you do not understand how to put your measurement into scale, you can ask someone to help you. Next, you have to measure the door and windows without their frames. Change the measurement into scale again. After that, you have to incorporate everything including windows, doors, and walls. Use double lines for windows and single line for doors.
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Do not forget to measure all the parts of the house that you want to include. Change the measurement to scale and incorporate it into the floor plan. If you want to make the floor plan clearer you can add moveable furniture in it. If you find that your floor plan is not drawn well, it is ok. You can give them to a designer and ask them to draw a good floor plan.