Occupation Certificate (OC)

An Occupation Certificate is a type of development certificate issued under the Environmental Planning and Assessment Act 1979.


An Occupation Certificate can only be issued by the Principal Certifying Authority (PCA) for the development. 


An Occupation Certificate allows a person to occupy or use a new building.


It is illegal to occupy or use any type of new building without an Occupation Certificate.


To enable an Occupation Certificate to be issued, the PCA must be satisfied that:

  • All mandatory critical stage inspections have been satisfactorily carried out
  • The building work is not inconsistent with the Development Consent or CDC
  • Any required “prior to the issue of an Occupation Certificate” conditions have been satisfied
  • BASIX commitments have been completed
  • All relevant installation/compliance certificates have been provided
  • The building is suitable to occupy or use, in terms of the Building Code of Australia

The issuing of an Occupation Certificate may be jeopardised if a critical stage inspection is missed.


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