One entrance, two populations, several cost questions
A mixed building has areas used almost entirely by one part of it and areas used by everybody. The commercial lift lobby on level two serves the tenancies. The residential corridors serve the apartments. The street entrance, the main lift core and the waste room serve both. Those three categories have quite different claims to being shared costs, and schemes handle the question in different ways.
None of that is a cleaning decision, but it determines what kind of document is useful. A single combined price cannot be allocated to anything. Three or four separate lines can be applied against whatever structure the scheme actually uses, and can be adjusted if that structure changes. Producing the quote in that form at the start costs nothing and preserves every option. Preserving that option costs nothing at the point the quote is written.
