NET FLOOR AREA
means the sum of any gross floor area; and includes: both freehold and leased areas; and any stock storage or preparation areas; but excludes: void areas such as liftwells and stair wells, including landing areas; shared corridors and mall common spaces; entrances, lobbies and plant areas within a building; open or roofed outdoor areas, and external balconies, decks, porches and terraces; off street loading areas; building service rooms; parking areas and basement areas used for parking, manoeuvring and access; and non-habitable floor spaces in rooftop structures.