We have small heritage type government buildings with really small floor sizes like 50 to 80 sqms(ie 540 to 860 sq feet) of Occupant area per floor. At these sizes the floors don't lend themselves easily to housing multi-tenants per floor with a common washroom particularly when the washroom isn't strategically located need the stairs. Is there a limit to floor size where one doesn't apply a Base Building Circulation and instead consider the floor suitable for single tenant occupation only?