The last five percent of a build takes twenty percent of the effort, and it’s the part owner-builders most often fumble — because the family wants to move in, the trades want their final payments, and the paperwork feels like admin. It isn’t admin. The occupancy certificate, the defect list and the handover pack are what convert a construction site into a legal, insurable, sellable home.
The final inspection and occupancy certificate
Before anyone sleeps in the house, the certifier issues the final approval — the occupancy certificate (names vary by state: occupation certificate, certificate of occupancy, certificate of final inspection). To get there, the certifier needs:
- The final mandatory inspection passed — the completed building against the approved plans.
- Every compliance certificate collected along the way: waterproofing, glazing, smoke alarms, termite management, plumbing, electrical, insulation/energy measures, and the structural certificates from slab and frame.
- Conditions of your development approval closed out — landscaping, driveways and stormwater conditions are the classic stragglers that stall certificates.
The defect walk: your one moment of maximum leverage
Before final payments move, walk every room with a checklist and painter’s tape — doors, drawers, taps, windows, switches, finishes, externals. List everything, however small, in writing, per trade.
This is the last moment the leverage runs your way: money still owed is the only reliable schedule a defect fix ever gets. Which is why the retention or final-payment terms you negotiated at contract stage matter — a defects liability period with something held against it turns your list into their to-do list. Pay everyone out first and the same list becomes a series of favours.
The handover pack: build it once, use it for a decade
Assemble one indexed file (digital, backed up):
- Approvals — DA/CDC or permit, endorsed plans, engineering.
- The inspection trail — every mandatory inspection record, slab to final.
- Compliance certificates — every trade, every wet area.
- Warranties and manuals — appliances, roof, membranes, HWS, with install dates.
- The photo archive — under-slab, in-wall, membranes; everything that’s now hidden.
- As-built notes — where the services actually run, paint codes, tile batches.
This pack is simultaneously your warranty enforcement file, your insurance evidence, your maintenance manual — and, because statutory warranties on your work follow the house for years after you sell, your legal defence file. Owner-builders in every state carry sale-time disclosure and insurance obligations (see your state hub for the specifics); the pack is what makes those obligations painless.
After the certificate
- Switch insurance from construction/contract works to home and contents the day the certificate issues — there’s a gap between the two that shouldn’t have a night in it.
- Diarise the defects liability period end for each trade package and re-walk the house the week before it expires.
- Keep the pack current — every warranty claim, every repair, into the file.
That’s the sequence complete — from site prep to keys. If you’re earlier in the journey than this page, the walkthrough works forwards too: start at step one.
Before you get here
Almost everything on this page is easy if the previous six stages filed their paperwork as they went — and miserable to reconstruct if they didn’t. The Pre-Start Review sets up the certificate trail before the slab; the stage guides above keep it running.