The ___________ is the vertical distance from grade plane to the average height of the highest roof surface.

Building height is defined as the vertical distance from the grade plane to the average height of the highest roof surface. This measurement is essential in determining various regulations and requirements related to zoning, construction, and safety protocols for commercial buildings.

Understanding building height is crucial because it impacts fire safety regulations, accessibility requirements, and the overall design of the structure. Local building codes often establish maximum heights to ensure that buildings fit within the character of the surrounding area and comply with infrastructure and safety considerations. Therefore, accurately determining the building height is foundational for compliance with these standards.

Other terms like building area refer to the total area of the building's footprint and are not concerned with vertical measurements. A court typically refers to an open space surrounded by buildings, and an exhausted enclosure may relate to specifics of design in terms of ventilation or pressure but does not pertain to height measurements. This reinforces why building height is the appropriate term in this context.