Where does the area removed from the bay window start? I mean, when you calculate the area on a plane,

It depends on the floating length and the height difference from the indoor ground. If the height difference reaches 0.30m and the average depth is less than1.20m, the area will not be calculated.

If the average depth exceeds 1.20m, it shall be calculated as 1/2 of the horizontal projection area, and the building spacing shall be controlled from the outer edge of the bay window. The height difference between the bay window and the indoor ground is less than 0.30m, and the height of the window hole is 2.20m, which is equivalent to the ground bay window. The total area is calculated by horizontal projection. If the height of the window is less than 2.20m, it shall be calculated as 1/2 of the horizontal projection area.