What is an occupation certificate in NSW?
An occupation certificate in NSW is the document that allows you to move into and use a new building. Your principal certifier issues it after the final inspection, once the house is consistent with its approval and suitable for occupation under the Building Code of Australia. It is the last formal step in building a new home.
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What an occupation certificate does
The NSW Planning Portal states that an occupation certificate (OC) must be obtained before anyone occupies and uses a new building or part of one. The rule applies whether your home was approved through a development application (DA) to council or a complying development certificate (CDC), because both routes end with the same certificate. The NSW Government's guide to the DA process describes the final OC as the last step in the formal approval and construction process.
The certificate matters beyond the move itself. Where your building contract does not define completion, NSW home building law can use the date of the OC to mark completion of the work. Completion is when statutory warranty periods and Home Building Compensation cover begin to run, so keep a copy of the certificate with your contract and insurance papers.
Who issues the occupation certificate?
Your principal certifier issues it. You appoint the principal certifier before work starts. Building Commission NSW is clear that your builder cannot appoint them or influence your choice. The certifier can be a registered building surveyor in private practice or your local council.
During the build the certifier carries out mandatory inspections at set stages of the work. It falls to the builder to tell the certifier when each stage is ready. The government's information sheet on certifiers warns that a missed inspection may force the certifier to refuse the occupation certificate. You can ask the certifier and builder to copy you into their correspondence, which keeps you aware of each inspection as it happens.
What the certifier checks before issuing it
Before a final OC is issued the certifier must be satisfied that development consent is in force and that the building is consistent with it. Any conditions that had to be met beforehand must be satisfied. On the DA route a construction certificate must also have been issued. Finally the building must be suitable for occupation under its Building Code of Australia classification.
New homes carry one further step. After the final inspection and before the final OC, the certifier issues a BASIX completion receipt for the home's energy, water and thermal commitments. If windows, insulation or the hot water system changed during the build, the BASIX certificate needs to be revised to match well before this point.
What an occupation certificate does not tell you
An OC confirms a minimum standard of compliance. The information sheet notes that a house can be suitable for occupation while painting or landscaping is still being finished. It also makes clear that the certificate does not confirm your builder has met the contract. Those are separate questions, settled between you and your builder when the work reaches completion under the contract.
For staged work a partial certificate can let you occupy the finished part of a building while the rest continues. Whichever form it takes, walk the house against your drawings and specification before you accept it as finished and list anything outstanding in writing.
How the certificate fits into a SHORE build
We carry our own documentation from approval through to construction detailing, as our design and build process sets out. That means the drawings your certifier inspects against are the drawings we prepared and build from. Our own supervisors check the structure against those drawings as the house goes up. We also measure the set-out twice because every trade that follows builds on it.
Once the home is complete, a guided handover walks you through the house, its systems and its warranties. We then return at three, six and twelve months to attend to settlement and defects. To see how approvals, construction and handover sit within one project, explore our custom homes in Sydney.
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