Split the building into constant and variable space
Start by marking every room as constant or variable. Constant space is used whether or not anyone books it: reception, corridors, staff amenities, public washrooms, kitchens and the entry. That space carries a fixed frequency and behaves like any ordinary schedule. Variable space is the set of rooms whose condition depends entirely on whether a group used them, and it needs a different treatment because a fixed frequency applied to an unused room buys nothing.
Most Fairfield buildings that host community, training or consultation activity end up roughly two thirds constant and one third variable. Getting that proportion right on paper matters, because it determines how much of the price is committed and how much flexes. A bidder who is told only the total floor area will assume everything is serviced every visit, and the resulting figure will look higher than a competitor who quietly assumed the opposite.
