Occupation Certificate (OC)
Final approval after construction is finished, certifying the building is safe to occupy and was built according to plans.
An Occupation Certificate (OC) is the final tick of approval after building work is complete, confirming the building is safe to occupy and was constructed according to approved plans and Building Code. Issued by the Principal Certifier (council or private) after final inspections verify compliance. You legally cannot occupy or use a building without an OC - this includes moving into new homes, using renovated spaces, or changing building use. The OC process includes: final inspection of all building work, checking fire safety equipment, verifying compliance with DA conditions (like landscaping), confirming services are connected (power, water, sewer), and checking accessibility features. There are different types: Interim OC (for part of building), Final OC (whole building complete), and OC for change of use. Don't organize removalists until you have the OC in hand.
What does it mean for my project?
Plan for the OC from the start . all approvals and inspections need to line up. You cannot lawfully occupy a new home or major addition until an OC is issued. Lenders and solicitors typically require an OC before settlement on new builds. Any missing documentation (engineers certificates, waterproofing certificates, etc.) can delay your OC
What do I need to think about?
Don't let the builder walk off the job without providing all compliance certificates and as-built documents. Unauthorised changes during construction can create OC headaches. If you move in without an OC, you may have insurance and legal issues. Strata and multi-dwelling projects have extra OC-related obligations
Examples where it might impact a project
We finished building in December but couldn't move in until we got the OC in January, had to wait for final inspections.
State specific stuff...
No state specific requirements - used across Australia (check your local council for any local variations).