Typical wall height for modern houses in my area is 8 ft. Interior plus floor framing and support - 1 ft, plus ceiling framing .5 ft . Roof height also varies based on pitch and building size. A common pitch is 4/12 meaning for every 12â³ horizontal run the roof rises 4â³ so a house 24 feet deep the peak would sit 4 feet above the top of wall If peak is in the center.