The Stages of Building a House in Australia (In Order)

An Australian residential build runs through nine stages, from site establishment to handover. Those nine group into the six build phases every trade on site uses — base, frame, lock-up, fix, fit-off and completion.

These are the words trades actually use. Nobody says "we're at stage eleven"; they say "we're at lock-up". If you have a construction loan, its drawdowns will usually line up with these phases too — though as an owner builder you have no head contract, so you pay each trade on its own terms rather than against a single schedule.

This is a generalised industry guide. Requirements vary between states, councils and sites. Always check your building permit conditions and your state's Building Act and Regulations.

The sequence at a glance

Base: stages 1–2

1. Site establishment. Your building surveyor is appointed, the permit is issued, and the site is set up — temporary fencing, power, water, toilet and bins. Vegetation and tree clearing happens here under permit, then the land surveyor sets out the building.

Appoint the surveyor at the start. They are your first professional engagement once you have plans.

2. Earthworks & footings — slab or stumps. Cut and fill to create the platform, underground drainage and service trenches, then footings and either a slab pour or stumps and a subfloor.

Hold point: footings inspection before any concrete is poured. This applies in every state and it stops a pour dead if it hasn't happened. NSW and QLD also list excavation as its own stage.

Frame: stage 3

3. Frame. Wall frames, roof trusses, bracing, tie-downs, lintels and any structural steel. Scaffolding goes up here and usually stays until the roof and external cladding are done.

Hold point: frame inspection once all framing is complete and braced, before anything covers it. The surveyor checks structural members, bracing and fixings against the engineering and AS 1684.

Lock-up: stage 4

4. Roof & lock-up. Roof covering, gutters, fascia and downpipes, then brickwork or lightweight cladding, render if specified, and windows and external doors. When this is finished the house is weathertight and can be locked — hence the name.

This is the most expensive single stage and the point where cash flow gets tested. By the end of it roughly two-thirds of the money is committed and the house still has no kitchen, no paint and no floor coverings.

Fix: stages 5–6

5. Rough-in. Plumbing pipework, electrical cabling, gas lines and HVAC ducting run through open framing, then insulation goes in.

There is no universal mandatory pre-plaster inspection in Australia — a common misconception. NSW's critical stages and Queensland's prescribed stages don't include one, and in Victoria your Relevant Building Surveyor decides which stages apply and lists them on your permit. What rough-in does require is a compliance certificate from each licensed trade — a Certificate of Electrical Safety or your state's equivalent, and a plumbing compliance certificate. Plumbing is regulated separately from building work in most states.

Your surveyor can list extra stages on your permit, so check yours. Many builders also time the frame inspection to happen after rough-in, so both are seen in one visit.

6. Fix. Plasterboard and cornice, then internal doors, architraves, skirting and robes, kitchen and bathroom cabinetry, waterproofing and tiling, and any staircase.

Hold point in NSW — and note where it falls. The waterproofing inspection happens inside this stage, not at the end of it: the membrane goes on, it is inspected, and only then does tiling cover it. It does not gate the rest of the fix work, and it is the only inspection in this stage.

It is a mandatory critical stage in NSW only. Not a separate mandatory stage elsewhere — including Queensland, where it's assessed at final — but have it inspected regardless. Membrane failure is among the most expensive defects in Australian housing, and work must comply with AS 3740.

Fit-off: stage 7

7. Fit-off & finishes. Tapware, basins, toilets, power points, switches, light fittings and appliances go in. Painting happens here, then floor coverings — carpet last, so other trades don't damage it. Mirrors and shower screens go in at the end.

Completion: stages 8–9

8. External completion. Driveway, paths, external slabs, stormwater drainage, decking, fencing, retaining and landscaping. Often trimmed when budgets are tight — but some of it is usually a permit condition, so check before you defer it. In NSW, stormwater is its own critical stage inspection, carried out before the drainage is covered.

9. Certification & handover. Builder's clean, defect list and rectification, then the final inspection. Passing it issues your Occupancy Permit or Certificate of Final Inspection. Collect every compliance certificate, warranty and manual — you'll need the full set at handover, at sale, and in any dispute.

Where the sequence actually bites

Services trades come back more than twice. Rough-in (stage 5) and fit-off (stage 7) are the two everyone knows about, but they are not the first visit. The plumber lays under-slab drainage before the slab is poured, and comes back again for external plumbing at completion — four visits. The electrician is usually on site at the very start to connect temporary power. Owner builders regularly book these trades for rough-in and fit-off only, then scramble.

Carpenters come three or four times. Frame, lock-up, fixing, then fit-off. Treat carpentry as a relationship across the whole build, not a single booking.

Lock-up is the cash-flow crunch. Around two-thirds of the money committed, and the house is still an empty shell.

Trades stack badly if you slip. Every trade after a delay is booked elsewhere. A one-week overrun at frame stage can become a four-week hole because the roofer moved to another job.

The mistake that costs the most

Closing up walls before the services behind them have been checked and certificated. It happens because the plasterer is available and chasing the electrician's paperwork feels like it can wait — and it means demolishing new plasterboard to get back to a cable or a pipe.

What makes this one dangerous is that, unlike footings or frame, no inspector will stop you. There is no universal mandatory pre-plaster inspection. The discipline has to come from you: get the compliance certificates in hand, walk the rough-in against your plans, and only then book the plasterer.

The regulated hold points exist because that work becomes very expensive to reach again. Rough-in carries exactly the same risk without the enforcement.

SiteForeman generates your build timeline in this order automatically from your plans, with the inspection checkpoints built in as blocking items.

Related reading

• What it costs to owner build in Australia — how the budget splits across these stages
• Mandatory building inspections by state — the hold points in detail
• Free owner builder cost calculator — an indicative range for your city and specification
• How to get quotes tradies actually take seriously — scoping a request that gets a real price back