Building Certification for New Homes
A complete guide to the building certification process for new residential builds in Australia, from plan assessment to occupation certificate.
Last reviewed: 2026-03-19
When to engage a certifier
Ideally during the design phase, before plans are finalised. Early engagement allows the certifier to flag potential compliance issues when they are cheapest to address. At minimum, you must have a certifier appointed and a construction certificate or building permit issued before any building work begins on site.
Many certifiers will do a preliminary plan review to identify obvious compliance issues before you commit to the full certification process. This early consultation can save significant costs if design changes are needed.
The certification process
The process has three stages. First, plan assessment: your certifier reviews the architectural, structural, and engineering documentation against the NCC and state requirements, then issues the construction certificate or building permit.
Second, construction inspections: the certifier visits the site at mandatory hold points (foundation, frame, waterproofing, pre-lining, final) to verify the work matches the approved plans. Construction cannot proceed past each hold point without sign-off. Third, completion: the final inspection confirms the building is ready for the occupation certificate, which legally authorises you to move in.
Required documentation
You typically need architectural plans, structural engineering drawings and calculations, an energy efficiency assessment (NatHERS rating or BASIX Certificate in NSW), a site survey, a geotechnical report (where required by soil conditions), and any specialist reports such as fire engineering, acoustic, or bushfire assessments.
Your certifier will provide a specific checklist based on your project. Having all documentation complete before lodging the application avoids processing delays.
Typical inspection schedule
A standard new house typically requires four to six mandatory inspections: foundation or footing stage, slab preparation, frame stage, waterproofing of wet areas, pre-lining (before plasterboard is installed), and the final inspection.
More complex designs, multi-storey homes, or sites in bushfire or flood zones may require additional inspections. Your certifier provides the full inspection schedule at the start of the project so you and your builder can plan accordingly.