Many Sydney households rent, particularly in the Inner West and around Parramatta, and every lease that ends creates a bond-back clean. Bonds in NSW are lodged with NSW Fair Trading, so tenants and agents both care about the final inspection.
Terraces in Newtown and Marrickville, apartment blocks near Parramatta and Ashfield, and family homes on the North Shore each need different crew sizes and time windows. Commercial cleaning follows the office districts, with Parramatta, North Sydney and Chatswood the obvious clusters.
Crews cannot double back across the Harbour Bridge between jobs without losing margin, so geography sets the economics as much as price does.