For every meter increase in the height of the house, the cost will be higher than 1%-3%, so there should be a reasonable scope of use. There are no hard and fast rules, just feel the space. The corridors, rooms and halls themselves are not uniform. If you are on the same floor and obey the main space, the ceiling height can be adjusted. When making a floor plan, you can draw a sketch in proportion to find a sense of space.
Extended data:
The height of residential buildings should be 2.80m m. The indoor clear height of bedrooms and living rooms (halls) should not be less than 2.40 m, the local clear height should not be less than 2. 10 m, and the indoor area of local clear height should not be greater than 1/3 of the indoor usable area. When using the space in the sloping roof as a bedroom and living room (hall), the indoor clear height with at least 1/2 usable area should not be less than 2. 10m.
The corridor shall not be less than 2.2 meters, and the indoor clear height of kitchen and bathroom shall not be less than 2.20 meters. The clear distance between the lower surface of the horizontal drainage pipe in the kitchen and bathroom and the floor and ground should not be less than 1.90 m, and it will not affect the opening of doors and window sashes.
Baidu Encyclopedia-Code for Residential Design