The finished floor to finished ceiling height (or floor-to-ceiling height) is defined as the occupiable distance between the floor slab and the ceiling, selected from among differing levels in accordance with the principles outlined above in floor-to-floor height.

This distance may be reduced by the thickness or positioning of fixed floor or ceiling tiles, but not by carpets, rugs, suspended lights, or similar fixtures. A floor which is raised above the slab (e.g. to conceal utilities) is considered the official floor for purposes of this measurement.

Three fields measure the same story and give three descending numbers. Floorplate to floorplate is the full story including the slab, floor to ceiling is what is left inside the finished room, and the indoor clearance is what remains once ducts and lighting hang below it. A value in the wrong field is out by the thickness of a slab or a ceiling void.

A building rarely has one value throughout. The lobby and the mechanical levels differ from the typical office story, and this field describes the typical one unless the record says otherwise.