Buying or building a brand new home comes with an assumption that everything will be perfect. In practice, new builds are one of the most common sources of defect reports we write, simply because a home involves thousands of individual trades and details, dozens of subcontractors moving through the site over several months, and mistakes happen even with good, well established builders.
Knowing what a proper new construction inspection actually checks helps you understand what you are paying for, and gives you a mental checklist if you are walking through the property yourself before your formal inspection. This article covers the finished home end to end. For how these same checks apply while the home is still being built, at base, frame, lockup and fixing, see our companion guide to building stage inspections explained.
Structural and Framing Checks
Even after handover, when the frame is no longer visible, an inspector reviews every accessible structural element for signs of movement, incorrect construction, or departures from the approved plans. This includes checking the roof structure from the roof space where accessible, the subfloor where the home has one, and any visible framing around openings such as garage doors and large windows.
The inspector is also looking for secondary evidence of structural problems that were not caught during construction: doors and windows that do not sit square in their frames, hairline cracking radiating from the corners of openings, floors that feel slightly uneven underfoot, or roof lines that are not straight when viewed along their length. None of these on their own is necessarily serious, but together they can point to a framing or footing issue worth investigating further.
For a fuller picture of the specific warning signs that matter most and why, see our article on signs of structural damage in houses, which applies just as much to a home that is only months old as it does to an older property.
Roof, Guttering and Waterproofing
Roof coverings, flashings, gutters and downpipes are checked for correct installation, adequate overlap, and correct fall towards the outlets. Poor roof drainage is one of the most common causes of long term water damage in Australian homes, and it is far easier to identify and correct in a brand new home, while the builder is still contractually responsible, than years later once staining, timber decay or mould have already set in.
Valleys, where two roof planes meet, deserve particular attention, along with any point where the roof meets a wall, such as behind a parapet or where a lower roof abuts an upper storey. These junctions are consistently the highest risk points on any roof, and a flashing detail that looks fine from the ground can still be wrong in a way that only shows up during heavy or wind driven rain.
Windows, Doors and Weatherproofing
Windows and external doors are checked for correct sealing, flashing above and around the frame, and smooth, correct operation. A window that is difficult to open or close, or that has visible gaps around the frame, is not just an inconvenience. It is often a sign that the flashing behind the reveal was not installed correctly, which is a direct path for water into the wall cavity.
Gaps or poor flashing around openings are a leading cause of water ingress in newer homes, and are covered in more detail in our article on why building inspectors check for signs of water. Because these issues are hidden inside the wall, they can go unnoticed for a long time, which is exactly why a thorough visual and functional check of every window and door at handover matters so much.
Internal Finishes and Fixtures
This covers paint quality and coverage, joinery alignment, door and drawer operation, skirting and architrave junctions, tiling consistency, and general presentation throughout the home. While cosmetic issues rarely affect the structural integrity of a home, they are usually the easiest defects to have rectified before handover, since your builder is contractually obligated to fix them at this stage rather than treating them as an afterthought once you have moved in.
A close inspection at this level typically finds a genuinely long list of minor items on almost every new home, from paint touch ups and misaligned cabinet doors through to skirting that has not been properly mitred at corners. Our interior building inspection service is specifically designed to work through this level of detail room by room, rather than doing a quick surface level walk through.
Wet Areas and Plumbing
Bathrooms, ensuites and laundries are inspected closely for waterproofing evidence, correct falls to floor waste and drainage, tapware installation, and any visible signs of leaks around baths, showers and vanities. Because the waterproof membrane itself is hidden under tiling by the time you inspect a finished home, the inspector is largely relying on indirect evidence: correct falls, properly sealed junctions, and the absence of any staining or dampness that would suggest water is already tracking somewhere it should not be.
Wet area defects that are missed at handover are consistently among the most expensive new build issues to fix later, since rectification usually means removing tiling to access and repair the waterproof membrane underneath, then re-tiling the entire area. This is exactly the kind of cost that is worth spending a modest amount up front to avoid.
Site and External Works
Beyond the building itself, an inspector checks site drainage, retaining walls, paths, driveways and any external structures for correct construction and grading. Ground levels should fall away from the building on all sides. Where they do not, water pools against the foundation instead of draining away, which over time is a common contributor to dampness issues inside the home. This is covered in more detail in our article on site drainage.
External works are also where builders sometimes cut corners toward the very end of a project, once the main build is complete and attention has moved on to the next job. Checking fencing, letterboxes, external taps, and the condition of paths and driveways as part of a formal inspection ensures these smaller items do not simply get forgotten.
Retaining walls deserve a specific mention, since they carry real structural and safety consequences if built incorrectly, particularly on sloping blocks common across the outer south east. A retaining wall over a certain height typically requires its own engineering, and an inspector checking a new build will look for obvious signs that a wall has been built without adequate drainage behind it, since trapped water pressure is one of the more common causes of retaining wall failure over time.
Common Defects Found in Brand New Melbourne Homes
Across the new builds we inspect, the most frequently reported issues are minor plastering and paint defects, doors and windows that do not close or seal correctly, incomplete or inconsistent waterproofing in wet areas, and drainage that has not been properly graded away from the building. For a fuller picture of what commonly turns up across Melbourne new builds, see our articles on common building defects in Melbourne homes and what lurks within your building, we’ll find it.
Knowing this pattern in advance is useful for two reasons. First, it tells you roughly what to expect, so a modest list of minor items at handover is normal and not a sign of a poorly built home. Second, it helps you focus attention on the areas that genuinely matter most, wet areas, structural elements and weatherproofing, rather than treating every item on the list as equally important.
It is also worth understanding that the volume of defects found tends to correlate more closely with how thoroughly a home is inspected than with how well it was actually built. A rushed walk through will always find fewer items than a methodical, room by room inspection, which is why two owners of similar quality homes can come away with very different sized defect lists depending entirely on how the inspection itself was carried out.
How This Differs From a Standard Pre-Purchase Inspection
It is worth understanding that a new construction inspection is a different exercise from a standard pre-purchase inspection on an established home. A pre-purchase inspection is assessing decades of accumulated wear, previous renovations, and the cumulative effects of age. A new construction inspection is assessing whether a home that is only months old was built correctly in the first place, which means comparing what has actually been built against the approved plans and the National Construction Code, not just documenting general condition. Our new home inspection service is scoped specifically around this distinction.
This distinction also affects how a report is written. A pre-purchase report on an established home is largely describing condition and flagging risk for a buyer who has not yet committed. A new construction report is measuring compliance against a specific, documented standard the builder was contractually obligated to meet, which tends to make findings more clear cut and easier to action with the builder directly.
Timing Your Inspection Around Practical Completion
Timing matters more than many owners expect. Booking the inspection too early, before the home is genuinely complete, means walking through a property still mid-way through final trades, with tape on the floor, protective film on benchtops, and items simply not yet finished, which makes it hard to separate a real defect from unfinished work. Booking it too late, after you have already accepted handover and made final payment, weakens your negotiating position considerably.
The ideal window is generally once your builder has notified you the home is ready for practical completion, but before you sign off and release final payment. This gives you a genuinely finished home to assess, while your builder is still contractually motivated to action the defect list quickly, since final payment and the handover date both depend on it.
Frequently Asked Questions
Q. Do new homes really need inspecting if they come with a builder’s warranty?
Yes. A warranty means defects can be claimed after the fact, but it does not stop defects from happening in the first place, and claiming under a warranty after you have moved in is far more disruptive than having an issue fixed before handover, while your builder still has trades on site and full access to the property. An inspection before you accept the keys gives your builder a documented list to action while they remain contractually obligated to fix it at no cost to you.
Q. What is the difference between a new construction inspection and a stage inspection?
A stage inspection happens during construction and checks work that is about to be covered up. A new construction inspection, typically done at practical completion, reviews the finished home as a whole. Ideally a new build gets both. See our guide to building stage inspections for how the two work together across a full build.
Q. What happens if defects are found after I’ve already moved in?
Most new home building contracts include a defects liability period, typically several months after handover, during which your builder remains responsible for rectifying issues. It is still far better to catch problems before handover wherever possible, since post-handover rectification usually means scheduling access, moving your own furniture out of the way, and living alongside tradespeople in your home.
Q. Should I be at the property during the inspection?
It is not required, but many owners find it useful to walk through with the inspector once the assessment is complete, so specific items can be pointed out directly, in addition to receiving the full written report with photos that documents everything found across the property.
Q. How long after handover can I still raise defects with my builder?
This depends on your specific building contract and the applicable defects liability period, which is commonly around three months for many residential contracts, though terms vary. Structural defects generally fall under separate, longer statutory warranty periods. It is worth checking the specific terms in your contract rather than assuming a standard timeframe applies.
Book Your Inspection
If you would like to talk through your specific property or situation, get in touch with Casey Building Inspections for a quote and to discuss the right type of inspection for your needs.
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