Occupation Certificate NSW: cost & requirements
You can't legally move in or use your building until the Occupation Certificate is issued — and you can't get the OC until every inspection has passed and every supporting certificate is in. Here's what's required, what it costs, and how to see the full checklist for your project.
See your OC checklist →What actually drives the cost
The Occupation Certificate is normally issued by your Principal Certifier as part of their fee — so the OC line item is small. The real cost is everything you have to complete before they can issue it:
- Mandatory inspections — footings, slab, frame, waterproofing, stormwater, final. Each must be booked and pass; a failed re-inspection costs time and money.
- Supporting certificates — structural adequacy, waterproofing, BASIX completion, electrical/plumbing compliance, and for units the fire safety, glazing and accessibility certificates.
- Principal Certifier fee — covers inspections + issuing the OC (often bundled with your CDC/CC fee).
- Bond refunds — chasing back damage/infrastructure bonds usually happens around OC time. Miss the paperwork and you lose them.
Why builds get stuck at OC
The most common trap: reaching the end of the build and discovering a required certificate was never collected, or an inspection was skipped. The OC can't be issued until the exact checklist for your building class and pathway is complete — so knowing that list up front, not at the end, is what keeps you out of trouble.
Get your full OC checklist for your property
Enter your address and project — we'll list every inspection and certificate required from CC/CDC through to OC, specific to your building class. $39 for the complete report.
See your requirements →Frequently asked questions
How much does an Occupation Certificate cost in NSW?
The OC itself is usually part of your certifier's fee — the cost is completing the inspections and supporting certificates required first. Those vary by project, which is why the real number is property-specific.
Can I move in without an Occupation Certificate?
No — occupying a new building or a substantially altered one without an OC is a breach and can create insurance and resale problems. The OC is the legal sign-off that the building is safe to occupy.
What's the difference between an interim and final OC?
An interim OC lets you occupy part of a building before all work is finished; a final OC is issued once the whole project is complete and every requirement is met.
Don't get stuck at the finish line
Know every inspection and certificate you'll need — from day one, not at OC time.
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