Start in one corner and measure along the wall approximately 36″ from the floor. Measure the wall until you reach a stopping point whether it is from a break in the wall, an obstruction, or an opening. If it is a window or a door, you will want to measure all the way across the window or door, from outside of trim to outside of trim. You will also want to measure the width of the trim and note it on your drawing. Continue on to the next break, obstruction, or opening. If there is none, continue to the corner. You will want to continue this process all the way around the room. After you have measured the individual spaces on each wall, take a wall to wall measurement. This will help you to double check your measurements.
Windows & Doors
After you have measured all of the walls, you will need to get additional information for the doors and windows. You will need to measure the overall door height, including trim, as well as the door swing. You will also need to measure the overall window height including trim, as well as the distance from the floor to the window sill. It is often helpful to make a chart and label each window A, B, C, as well as each door. You can record your measurements in the chart.
Ceiling & Soffits
Your next step will be to measure the ceiling height of your kitchen. You will want to take the measurement in a few different areas to judge how level the floor is. If your kitchen currently has soffits, you will also need to measure them. You will want to measure the height as well as the distance they jut out from the wall.