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Handover on a factory-built home — the two inspections instead of one

From Modular Living Australia — the independent knowledge base Last updated: 8 Oct 2026

In New South Wales a new home carries statutory warranties of six years for major defects and two years for minor defects, and NSW Fair Trading runs a free complaint handling service.^[1] A pre-handover inspection checks the building against the NCC, the approved plans and the contract, the warranty period runs from practical completion rather than the move-in date, and most contracts allow the final progress payment to be held back until practical completion.^[2]

On a conventional build, handover is a single event. The builder finishes, you walk through with a list, items get fixed, you get the keys.

An off-site build has two moments that matter, and most standard contracts are written as though it only has one. The house is substantially finished inside a factory you may never visit, then transported, then craned onto a foundation, then connected. Between "finished" and "yours" sit a truck journey and a lift — and the walk-through everyone plans for happens at the end of that, when the last opportunity to see how the building was assembled has already passed.

This page is about structuring the handover around that reality.

Why the date matters more than the walk-through §

Warranty periods start from the date of practical completion, not the date you move in.^[2] In New South Wales, a homeowner has statutory warranties of six years for major defects and two years for minor defects.^[1]

So the question "when did practical completion occur?" is not paperwork. It is the start of a clock that determines how long you can raise a defect, and on a modular project the answer is genuinely ambiguous. Was it when the module was finished in the factory? When it landed on the piers? When the plumber connected the last service? When the occupation certificate issued?

Get the definition written into the contract before you sign it, in terms that name the physical milestone rather than a stage label. If the contract is a standard form written for on-site construction, the milestone it describes may not correspond to anything that happens in this project.

The factory checkpoint §

This is the inspection that only exists on an off-site build, and the one people skip.

Once wall linings go on in the factory, the framing, insulation, waterproofing membranes, services rough-in and any structural reinforcement behind bathroom walls are closed up permanently. On a site build you would have seen those stages, or a certifier would have inspected them. In a factory two states away, you will not — unless you arrange it.

Ask, in writing and before the contract:

• Can I, or an inspector I appoint, attend the factory before linings are installed?
• If not, who inspects at that stage, what is their independence from the manufacturer, and do I receive their report?
• Will I receive dated photographs of framing, insulation, membranes and services rough-in for each module?
• Is bathroom wall reinforcement documented? It is invisible once lined and effectively unverifiable afterwards. See the Livable Housing Design Standard and factory-built homes.

If the answer to all of the above is no, that is not necessarily a reason to walk away — but it tells you the entire construction quality question rests on the manufacturer's internal process and on statutory warranty rights exercised later, rather than on anything you can verify at the time.

The delivery checkpoint §

Transport and craneage are where a finished building is most likely to acquire damage, and the moment of arrival is the only clean line between the manufacturer's responsibility and the site builder's.

Worth resolving in advance:

• Who bears risk during transport and lifting, and does insurance sit with the manufacturer, the transporter or you? See insuring a modular or prefab build.
• Is there a documented condition inspection at the point of dispatch and again on arrival, before the modules are set and joined?
• Cracked cornices and popped joints at module junctions are common enough that they are often treated as expected. Is that stated in the contract, and who rectifies them? How interior finishes and cracking are judged is covered in interior finishes in modular homes.

Once modules are joined and the roof is closed, distinguishing transport damage from a manufacturing defect becomes an argument rather than an observation. Related coverage at delivery, transport and craneage.

The site checkpoint §

This is the inspection that resembles a conventional handover, and it is the one an independent inspector is most useful for.

A pre-occupancy or practical completion inspection checks the building against the National Construction Code, the approved building plans and the construction contract, to identify defects, incomplete work and non-compliant items for rectification before handover.^[2] On a modular home the list has some additions that a site-built inspection would not carry:

• Module junctions — floor level continuity across the join, ceiling and cornice alignment, and whether the join is weatherproofed at roof and wall
• The connection between the modules and the foundation, particularly where the home is raised on piers
• Services that were split across modules and joined on site: plumbing at the junction, electrical circuits crossing between modules, and anything that was capped in the factory
• Site works that were never in the factory scope at all — stairs, decks, ramps, driveway, drainage, and the accessible entry path where a raised floor is involved

Two of those interact with material covered elsewhere: raised floors are common on flood-prone land, and step-free entry is a Livable Housing requirement.

Money as leverage §

Under most building contracts and state legislation, an owner is entitled to withhold the final progress payment until the building reaches practical completion.^[2]

On an off-site build that leverage is structurally weaker than on a site build, because a much larger share of the contract value has already been paid before anything arrives on your block. By the time you are standing in the finished house with a defect list, the amount still outstanding may be small relative to the work in dispute.

That is not an argument against off-site construction. It is an argument for reading the payment schedule as a risk document rather than an administrative one, and for making sure the final tranche is large enough to matter. This is the central issue in progress payments and off-site construction, and it is why what happens if your builder becomes insolvent reads differently for a factory-built home.

If it goes wrong §

Try to resolve the matter with the contractor or builder first. Where that fails in New South Wales, NSW Fair Trading provides a free complaint handling service covering home building work — houses and multi-unit dwellings as well as the quality of specialist trade work — and can assist with complaints under the Home Building Act 1989.^[1]

Note the boundary that catches modular buyers: statutory home warranty schemes are generally directed at residential building work, and the treatment of the off-site manufacturing portion is not the same as the on-site portion. That gap is set out in insuring a modular or prefab build and building insurance and warranty schemes by state. State-by-state dispute pathways are at what to do about a building dispute.

A short list to take to the builder §

Before signing, ask for written answers to these:

1. What physical milestone constitutes practical completion for this contract?
2. Can I or my inspector attend the factory before linings are installed?
3. What documentation of concealed work will I receive, and when?
4. Who carries risk for transport and craneage damage, and how is it inspected?
5. What proportion of the contract value remains payable after the modules are set on site?
6. What is the defects rectification process, who attends, and over what period?
7. Which parts of the finished home are covered by the statutory warranty scheme in my state, and which are not?

What is not covered here §

This page does not give a room-by-room defect checklist. Inspection standards, tolerances for surface finishes and what counts as a defect rather than an acceptable variation are technical matters covered by industry guides and assessed by qualified inspectors.

It does not state the statutory warranty periods for any state other than New South Wales. Those periods, and the events they run from, differ between jurisdictions and no primary source establishing each was compiled for this page.

It does not define practical completion. The definition comes from your contract, and standard forms differ; the sources here describe the concept and its consequences rather than a legal test.

It does not cover occupation certificates, the inspections a certifier carries out, or the sequence of mandatory inspections during construction, all of which are set by state building legislation. It does not cover strata or apartment handover. And it does not tell you how much to withhold from a final payment — an unreasonable holdback can itself put you in breach, and that is a question for your own legal adviser.

References §