Which of the following spaces is typically excluded from Rentable Area?

The reason stairwells are typically excluded from Rentable Area is that Rentable Area is defined as the total space that is available for tenants to occupy and use, which generally does not include access and core facilities meant for circulation and safety. These core areas, such as stairwells, are essential for the building's functionality and are considered common areas that support the overall occupancy but are not available for tenant-specific activities or use. Therefore, because stairwells serve a structural and access purpose rather than being directly usable for tenant business activities, they are not included in the Rentable Area calculation. This approach promotes a clear distinction between areas tenants can directly utilize versus communal building infrastructure.

In contrast, elevator lobbies, service spaces, and usable areas are generally included or considered in different contexts of space measurement as they relate more closely to user experience and tenant operations.