Certificate of occupancy (cross-state)
Certificate of occupancy is the cross-state term for the final document allowing a building to be lawfully occupied: OC in NSW, OP in Vic, Form 21 in Qld.
Ask Chalkline about this →A certificate of occupancy is the generic Australian term for the final-stage statutory document, issued by the principal certifier or the local council, that allows a completed building to be lawfully occupied or used. The specific document name and statute differ by state, but they all serve the same purpose: the hard gate between practical completion and handover.
| State | Document | Statute | Issued by |
|---|---|---|---|
| NSW | Occupation Certificate (OC) | EP&A Act 1979 | Principal certifier |
| VIC | Occupancy Permit (OP) | Building Act 1993 | Relevant Building Surveyor (RBS) |
| QLD | Final Inspection Certificate (Form 21) | Building Act 1975 | Building certifier |
| WA | Notice of Completion / Occupancy Permit | Building Act 2011 | Permit authority / building surveyor |
| SA | Statement of Compliance and Occupation | Planning, Development and Infrastructure Act 2016 | Council or private certifier |
| TAS | Certificate of Completion / Occupancy Permit | Building Act 2016 | Building surveyor |
| ACT | Certificate of Occupancy | Building Act 2004 | Construction Occupations Registrar (Access Canberra) |
| NT | Occupancy Permit | Building Act 1993 (NT) | Building certifier |
(All references verified 2026-05-16.)
Why the term matters in residential contracts. Many residential contracts link the final progress payment, and the start of the defects liability period, to “certificate of occupancy” or “occupation certificate”. The contractual term must be read in the state context: an HIA NSW contract uses “Occupation Certificate”; an ABIC Vic contract uses “Occupancy Permit”. The two are not interchangeable on the paperwork, but they perform the same function. A contract drafted in a different state to the project location will sometimes carry the wrong terminology, which is a contract-formation defect rather than a substantive problem if both parties understand the equivalent document.
The pacing risk. The certifier issues the document after they are satisfied that all mandatory inspections passed, compliance certificates are on file, and the project meets the Building Code. The builder cannot force the certifier to act faster than their internal turnaround. On a residential build, missed inspections or missing certificates can hold the certificate of occupancy for weeks past practical completion, even when the work is physically complete. Contracts that link the final payment to the document accept the certifier’s pace as the bottleneck.
Also known as: OC (NSW); occupancy permit (Vic, NT); Form 21 (Qld); notice of completion (WA); statement of compliance (SA); final inspection certificate (Qld); certificate of completion (Tas).
Category: Approvals.
Related
- OC (Occupation Certificate, NSW)
- Occupation certificates (NSW deep dive)
- PCA (Principal Certifying Authority)
See also
Last updated: 2026-05-16. Verified: 2026-05-16. Quarterly review for currency.