(1) The main building and the side building will be built at the same time. In this case, although sharing a wall is no problem, it is not taboo.
(2) It is unlucky to build the main building first, and then prepare to build a wing and share a wall. In feng shui, this is called "Lian Zhai", which will destroy the original feng shui pattern and lead to unstable luck.
(3) If it is a wing, that is, the wing orientation is different from the main house, and it is generally at a 90-degree angle with the main house orientation, which is similar to a quadrilateral. This situation is not taboo, nor is it called "foreclosure". But the wing shall not be higher than the main room.
(4) Although there is no taboo to share a wall between the wing and the main building, it is more reasonable in Feng Shui that the main building and the wing are independent buildings, especially large families, to avoid disputes caused by too many departments involved in the family; It doesn't matter if you have a small family. There are not so many departments.
⑤ Geomantic meaning of sharing a wall: Different buildings have something in common, which means they have * * * places and * * * camps. If a family lives in a place where most couples' careers and external environment will intersect.
There is a saying among the people that the East Palace does not hurt children and the West Palace does not defeat women. This generally refers to the eaves of the wing leaning out and cutting on the main room to form an angle. But there is no similar example at present, so you can refer to it.
The above answers are based on professional architectural geomantic omen. I hope they can help you and be adopted.