Find out what outgoings already buy
Building management usually holds a base building cleaning specification, and most will share a summary on request. It typically covers ground floor lobby, lift cars and lobbies on each level, common amenities, fire stairs, loading dock and external glazing on a cycle. Some buildings also collect tenancy waste from a floor holding point, which materially changes what a tenancy cleaner needs to do. Confirm which of these apply to your floor rather than assuming the standard arrangement.
Read it for exclusions as well as inclusions. Base building specifications often stop at the tenancy line even where the floor is single-occupancy, and they rarely include internal kitchen equipment, tenant meeting rooms or dishwashing. Knowing precisely where the specification stops tells you where your own scope has to begin, and prevents a bidder pricing a corridor twice. Write the boundary into your own document even when management has already described it verbally.
