Is the terrace considered a missing corner of the house?

Doesn’t count.

According to the query on Yi'anju Jixiang.com, the terrace belongs to the owner's use area and is part of the house. It does not count the missing corner of the house. The missing corner of the house refers to the missing two-thirds of one side of the building. The corners are concave or tilted, and the center of gravity shifts, leaning to the left or leaning to the right, or larger in front and smaller in back, presenting an irregular square or vaguely tilted polygon, and the center of the missing corner of the house is the center point of the circle. , the farthest point connecting the house is a circle with a radius, including the inner balcony, but the outer balcony and bay window are not included.