This discussion addresses how multiple housing societies within a shared campus can equitably divide the costs for maintaining common areas like private streets and gardens. The secretary of a housing society with several buildings seeks advice on whether to base these shared expenses on the square footage of each building or the number of flats. While individual societies often use a mix of per-square-foot and per-flat charges for their internal maintenance, the consensus leans towards using the square footage area as a fairer method for allocating common campus maintenance costs.