But here is the actual rule of thumb for setting floor to floor heights.
Height from ceiling to floor.
Today s standard ceiling height is nine feet.
Habitable spaces that have a sloped ceiling shall at no point have a ceiling height less than 5 feet and no less than 50 of the floor area shall have a ceiling height less than 7 feet.
Many new homes have a higher ceiling height on the first floor.
The true floor is the area s lowest structural element be it the floor or the concrete slab beneath the floor.
Newer houses are often built with nine foot ceilings on the first floor and sometimes eight foot ceilings on the second story.
Do be aware that you will probably lose some height because of the need for insulation and floor ceiling finishes roughly 20 25cm.
The true ceiling height or simply ceiling height is the distance between the floor and the area under the roof i e not the lowest hanging object or drop ceilings.
This is often close to 9 0.
Decide on the typical ceiling height based on the kind of spaces your building will have.
Most building codes consider a habitable room such as a living room or bedroom to only have the square footage that has an average height from nominal top of floor to nominal bottom of.
I greatly prefer a ceiling height of 8 4.
It may be slightly less or more than this but depends on your existing roof structure which also may need to be configured to remove any struts that you currently need to step over to move around the space.
9 0 9 6 and 10 0 are not unusual.