How high would it be to build a bathroom under a stairwell that is 2.5 meters wide and 4 meters long?

If you want to build a bathroom under a 2.5-meter-wide and 4-meter-long stairwell, it can be more than 2 meters long.

The height of the space under the stairs is usually relatively short, so when setting up a bathroom under the stairs , the bathroom should be set up in a high space under the stairs as much as possible, at least above 1.9 meters, and the lowest point should not be less than 1.5 meters. Bathrooms are usually located under the stairway. The area is about 1.2×1.8 meters, with a toilet or squat toilet installed inside, depending on the activity space, and a wash basin.