The standard buyer due diligence checklist that gets handed out by conveyancers and buyer’s agents covers the basics adequately. What it doesn’t always emphasise is which items routinely surface real issues versus which items get checked because checking them is procedure. After watching dozens of property purchases play out over the past two years, here’s the version of the due diligence list that actually catches what matters.

The framing matters. Due diligence isn’t about producing a clean report; it’s about identifying what could go wrong with the property purchase before you’re contractually committed to it. The items that catch real issues are the items worth spending real time on.

Building and pest inspection — the items that actually matter

Building inspection reports follow a standard format and produce a lot of detail. Most of the detail is noise. The items that actually matter are specific.

Active termite damage versus historical evidence. The reports often note signs of past termite activity. The question is whether the activity is current and whether the damage compromises structure. Buyers who don’t read this carefully sometimes interpret historical evidence as a deal-killer when it isn’t, or interpret active infestation as a minor issue when it isn’t. Get clarity from the inspector on the question, not just the documented finding.

Roof condition and remaining life. Roofs are expensive to replace and the assessment of remaining service life is one of the genuinely useful things a building inspection provides. A roof with 5+ years of remaining life is fine. A roof with 2 years or less of remaining life is a financial commitment the buyer is taking on. The pricing implications of this matter and aren’t always reflected in the offered price.

Drainage and waterproofing in wet areas. The bathrooms, the kitchen, and the laundry are where slow leaks accumulate damage that’s expensive to remedy. Active leakage indications, signs of past water damage, or ageing waterproofing membranes all warrant follow-up. Property reports that flag these without clear assessment of severity should be discussed with the inspector directly.

Structural movement and footings. Cracks in walls and slabs are sometimes purely cosmetic and sometimes indicate genuine structural movement. The inspector’s assessment of which is which is important and isn’t always clearly conveyed in written reports.

Asbestos presence and condition. Most pre-1990s Australian houses contain some asbestos. The condition matters more than the presence. Friable damaged asbestos is a real cost; intact bonded asbestos in a stable wall sheet is generally not.

Title and property certificates

The standard title search produces useful information but the items worth focusing on are specific.

Easements and encumbrances. The detail of what easements exist, what they permit, and what restrictions they impose on the use of the property matters. Buyers who skim past easement detail can find themselves owning property with significant restrictions on their use of it.

Caveat or other charges. Active caveats indicate disputes that haven’t been resolved. The detail matters and the resolution should be confirmed before settlement.

Strata or owner’s corporation reports for unit and townhouse purchases. The financial position of the body corporate, the existence of special levies, the maintenance fund balance, and any planned major works can all be significant financial implications for the buyer post-purchase. The strata search isn’t a routine procedural item; it’s substantive financial due diligence.

Council certificates regarding compliance of any improvements. Unauthorised structural alterations, additions without permits, work done outside building approvals — all of this can produce future costs and complications. Council searches that confirm compliance versus searches that flag issues should be carefully read.

Council and planning matters

Less commonly emphasised in routine due diligence but often the source of significant post-purchase surprises.

Zoning and permitted use. Confirming that the existing use is the permitted use, that any planned modifications are permissible, and that any latent development potential is correctly understood. Properties with constraints not visible on routine inspection — heritage overlays, environmental controls, flood zone designations — can have substantial implications for future use and resale.

Adjoining property approvals or development applications. The neighbour’s planned development that wasn’t built yet at inspection time but might be obvious as a future imposition on the property’s amenity. Council searches in the vicinity catch these.

Council infrastructure plans. Road widening, public transport additions, drainage works — all of this can affect a property’s amenity over time. The major plans are usually well-publicised; the minor plans sometimes aren’t and surface in council search reports.

Finance and insurance verification

The items that buyers sometimes assume are sorted but aren’t always:

Pre-approval limits versus actual property valuation. The bank’s pre-approval limit doesn’t translate directly into the loan they’ll provide for the specific property. The bank’s valuation of the property may differ from the contract price. The implications for the deposit and the loan structure matter and need to be confirmed before contract.

Insurance availability and pricing. For some property types and locations, insurance is non-trivial. Bushfire prone properties, flood-affected properties, properties in areas with subsidence histories can all face significant insurance limitations or premium premiums. Confirming that the property is insurable at acceptable terms before contract is sound practice and is sometimes overlooked.

Lender’s mortgage insurance implications. For purchases that will require LMI, the cost is significant and varies by lender. The buyer’s structuring of the deposit and the loan can affect both the LMI cost and the long-term loan economics in ways that aren’t always made clear in the standard advice.

The contract itself

The contract terms beyond the price matter and are sometimes underweighted in due diligence.

Settlement period and conditions. The standard 42 or 60 day settlement may not work for the buyer’s circumstances. Longer or shorter settlements have implications for finance, for ongoing rent or living arrangements, and for the practical logistics of moving. Negotiating the right settlement is part of due diligence.

Inclusions and exclusions. The fixtures, fittings, and chattels that are included in the sale should be specifically listed in the contract. Verbal assurances about what’s included don’t survive contract execution. Confirming the inclusions list matches the buyer’s expectations is genuinely useful work.

Special conditions. Any special conditions in the contract — vendor warranties, allowances, rectification works to be completed by vendor — need to be specifically reviewed for adequacy and enforceability. Special conditions written loosely often produce post-settlement disputes.

Cooling-off rights. The cooling-off period and any waivers should be understood. In some states cooling-off rights are limited or waivable; the implications of any waiver matter.

What buyers consistently overlook

A few patterns I see repeatedly:

Future capital expenditure on the property. The roof replacement that’s two years out, the bathroom renovation that the property obviously needs, the kitchen that’s nearing end of life — all of these are real future costs that should be in the buyer’s overall economic assessment of the purchase. Properties priced as if they’re move-in-ready when they’re not are properties where the buyer’s all-in cost is higher than the contract price suggests.

Body corporate and ongoing cost projections. For unit and townhouse purchases, the body corporate fees and special levy history is the most reliable predictor of future costs. Properties with consistent moderate fees and no special levies tend to continue that pattern. Properties with rising fees or recent special levies often have additional costs coming.

Neighbourhood-level considerations. The property’s amenity is affected by what surrounds it. Construction activity in the area, planned developments, the trajectory of the local retail and services environment, school catchment changes — all of this affects the property’s medium-term experience and value. Buyers who assess the property in isolation from its context often produce purchase decisions they regret.

The honest summary: due diligence is the buyer’s last chance to identify problems before contract execution. The items worth focusing on are the ones that produce material findings, not the ones that produce procedural completeness. Spending the time and money to do the substantive items properly, rather than treating due diligence as a formality, produces better purchase outcomes.