If the entrance of the north house is shorter than the entrance of the east house (refers to the door pillow), the feng shui is bad and unlucky, and the owner will break the money or get sick, which is even worse in the long run. It is suggested that the door pillow and the whole ground (commonly known as the door) in the north house should be raised as a whole, which must be higher than that in the east house.
In addition, it is unlucky if the lintel of the north house is lower than that of the east house. The lintel (that is, the overall height of the door) must be raised to make it higher than the East House.
Of course, the criteria for judging the main house are orientation and gate.
If your house faces south and the gate faces south, then the north house is naturally the main house.
If your house is east-west and the gate is in the west, then the East House is naturally the main house.
If your house really faces east, the roof of the north house can't be higher than that of the east house in any case.