"4. NET RENTABLE AREA (N.R.A.)
Application:-
To be used in relation to commercial office buildings for:-
. Calculating tenancy areas for whole buildings, whole floors,
or sub-divided floors.
. Operating Cost Analysis
. Capital Cost Analysis
. Floor space ratio and site coverage calculation in some
areas.
Definition:-
4.1 The net rentable area of a building is the total of all the
whole floor rentable areas.
4.2 Net Rentable Area - Whole Floors
The whole floor net rentable area is the floor space in
square metres confined within the building at each floor
level adopting the following method of measurement:
4.2.1 Measurement is taken from the internal finished
surfaces of permanent walls and from the internal
finished surfaces of dominant portions of the
permanent outer building walls.
4.2.2 Areas occupied by structural columns and engaged
perimeter columns are included in the net rentable
area.
4.2.3 The following areas of each floor are to be excluded
from the net rentable area:
4.2.3.1 All stairs, toilets, cleaners
cupboards, lift shafts and motor
rooms, escalators, tea rooms and
plant rooms, and other service
areas, where all are provided as
standard facilities in the building.
4.2.3.2 Lobbies between lifts facing other
lifts serving the same floor.
4.2.3.3 Areas set aside as public space or
thoroughfares and not for the
exclusive use of occupiers of the
floor or building.
(Note: Any additional common areas
resulting from the sub-division of a
whole floor for the purpose of sub
leasing does not constitute 'public
areas or thoroughfares' in this
context.)
4.2.3.4 Areas set aside for the provision of
facilities or services to the floor
or building where such facilities
are not for the exclusive use of
occupiers of the floor or building.
4.2.3.5 Areas set aside for use by service
vehicles and for delivery of goods
and access ways thereto where such
areas are not for the exclusive use
of particular occupiers of the floor
or building.
4.2.3.6 Areas set aside for car parking and
access ways thereto where such areas
are not for the exclusive use of
occupiers of the floor or building."