Building Classifications

Russ Porteous
CEO, Firewize
10 May, 2007

The Building Code of Australia ("BCA") is a nationally consistent technical document that represents the level of safety that meets community expectations. Compliance with the BCA is the responsibility of local government authorities.

The BCA provides a classification system for a building or part of a building and is determined by the purpose for which it is designed, constructed or adapted to be used.

NCC BCA Building Classifications

Building Classifications

Building Code of Australia, Building Classifications
Building Class Type of building
Class 1 Class 1a - a single dwelling being
  1. a detached house;
  2. one of a group of two or more attached dwellings, each being a building, separated by a fire-resisting wall, including a row house, terrace house, town house or villa unit;
Class 1b - a boarding house, guest house, hostel or the like
  1. with a total area of all floors not exceeding 300 m2 measured over the enclosing walls of the Class 1b; and
  2. in which not more than 12 persons would ordinarily be resident, which is not located above or below another dwelling or another Class of building other than a private garage.
Class 2 a building containing 2 or more sole-occupancy units each being a separate dwelling.
Class 3 Backpacker accommodation, residential parts of hotels or motels, residential parts of schools, accommodation for the aged, disabled or children a residential building, other than a building of Class 1 or 2, which is a common place of long term or transient living for a number of unrelated persons, including -
  1. a boarding-house, guest house, hostel, lodging-house or backpackers accommodation; or
  2. a residential part of a hotel or motel; or
  3. a residential part of a school; or
  4. accommodation for the aged, children or people with disabilities; or
  5. a residential part of a health-care building which accommodates members of staff; or
  6. a residential part of a detention centre.
Class 4 a dwelling in a building that is Class 5, 6, 7, 8 or 9 if it is the only dwelling in the building.
Class 5 an office building used for professional or commercial purposes, excluding buildings of Class 6, 7, 8 or 9.
Class 6 a shop or other building for the sale of goods by retail or the supply of services direct to the public, including?
  1. an eating room, cafe, restaurant, milk or soft-drink bar; or
  2. a dining room, bar, shop or kiosk part of a hotel or motel; or
  3. a hairdresser?s or barber?s shop, public laundry, or undertaker?s establishment; or
  4. market or sale room, showroom, or service station.
Class 7

Class 7a - a carpark; or

Class 7b - for storage, or display of goods or produce for sale by wholesale.

Class 8 a laboratory, or a building in which a handicraft or process for the production, assembling, altering, repairing, packing, finishing, or cleaning of goods or produce is carried on for trade, sale, or gain.
Class 9

Class 9a - a health-care building, including those parts of the building set aside as a laboratory; or

Class 9b - an assembly building, including a trade workshop, laboratory or the like in a primary or secondary school, but excluding any other parts of the building that are of another Class; or

Class 9c - an aged care building.

Class 10

Class 10a - a non-habitable building being a private garage, carport, shed, or the like; or

Class 10b - a structure being a fence, mast, antenna, retaining or free-standing wall, swimming pool, or the like.

Class 10c — a private bushfire shelter.